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  • E-mailHalvor.Sommerfelt@uib.no
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    Jussbygg II, Jekteviksbakken 31
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    5020 Bergen
Journal articles
  • Jull, Janet E.G.; Whitehead, Margaret; Petticrew, Mark; Kristjansson, Elizabeth; Gough, David; Petkovic, Jennifer; Volmink, Jimmy; Weijer, Charles; Taljaard, Monica; Edwards, Sarah Jane L.; Mbuagbaw, Lawrence; Cookson, Richard; McGowan, Jessie L.; Lyddiatt, Anne; Boyer, Yvonne; Cuervo, Luis Gabriel; Armstrong, Rebecca; White, Howard; Yoganathan, Manosila; Pantoja, Tomás; Shea, Beverley J.; Pottie, Kevin; Norheim, Ole Frithjof; Baird, Sarah; Robberstad, Bjarne; Sommerfelt, Halvor; Asada, Yukiko; Wells, George A.; Tugwell, Peter; Welch, Vivian. 2017. When is a randomised controlled trial health equity relevant? Development and validation of a conceptual framework. BMJ Open. 7. doi: 10.1136/bmjopen-2016-015815
  • Mazumder, Sarmila; Taneja, Sunita; Dalpath, Suresh Kumar; Gupta, Rakesh; Dube, Brinda; Sinha, Bireshwar; Bhatia, Kiran; Yoshida, Sachiyo; Norheim, Ole Frithjof; Bahl, Rajiv; Sommerfelt, Halvor; Bhandari, Nita; Martines, Jose Carlos. 2017. Impact of community-initiated Kangaroo Mother Care on survival of low birth weight infants: Study protocol for a randomized controlled trial. Trials. 18:262: 1-10. doi: 10.1186/s13063-017-1991-7
  • Nankabirwa, Victoria; Tumwine, James K; Namugga, Olive; Tylleskär, Thorkild; Ndeezi, Grace; Robberstad, Bjarne; Netea, Mihai G.; Sommerfelt, Halvor. 2017. Early versus late BCG vaccination in HIV-1-exposed infants in Uganda: Study protocol for a randomized controlled trial. Trials. 18:152: 1-17. doi: 10.1186/s13063-017-1881-z
  • Nankabirwa, Victoria; Tylleskär, Thorkild; Tumuhamye, Josephine; Tumwine, James K; Ndeezi, Grace; Martines, Jose Carlos; Sommerfelt, Halvor. 2017. Efficacy of umbilical cord cleansing with a single application of 4% chlorhexidine for the prevention of newborn infections in Uganda: Study protocol for a randomized controlled trial. Trials. 18:322: 1-9. doi: 10.1186/s13063-017-2050-0
  • Singh, Prashant; Arora, Palak; Strand, Tor A; Sommerfelt, Halvor; Lodha, Rakesh; Kabra, Sushil Kumar; Aneja, Satinder; Natchu, Uma Chandra Mouli; Chandra, Jagdish; Rath, Bimbadhar; Sharma, Kumar; Kumari, Meena; Saini, Savita; Bhatnagar, Shinjini; Wadhwa, Nitya. 2017. Predictors of death in infants with probable serious bacterial infection. Pediatric Research. Published 2017-11-22. doi: 10.1038/pr.2017.299
  • Verani, Jennifer R.; Baqui, Abdullah H.; Broome, Claire V.; Cherian, Thomas; Cohen, Cheryl; Farrar, Jennifer L.; Feikin, Daniel R.; Groome, Michelle J.; Hajjeh, Rana A.; Johnson, Hope L.; Madhi, Shabir A.; Mulholland, Kim; O'Brien, Katherine L.; Parashar, Umesh D.; Patel, Manish M.; Rodrigues, Laura C.; Santosham, Mathuram; Scott, J. Anthony; Smith, Peter G.; Sommerfelt, Halvor; Tate, Jacqueline E.; Victor, J. Chris; Whitney, Cynthia G.; Zaidi, Anita K.; Zell, Elizabeth R. 2017. Case-control vaccine effectiveness studies: Preparation, design, and enrollment of cases and controls. Vaccine. 35: 3295-3302. doi: 10.1016/j.vaccine.2017.04.037
  • Verani, Jennifer R.; Baqui, Abdullah H.; Broome, Claire V.; Cherian, Thomas; Cohen, Cheryl; Farrar, Jennifer L.; Feikin, Daniel R.; Groome, Michelle J.; Hajjeh, Rana A.; Johnson, Hope L.; Madhi, Shabir A.; Mulholland, Kim; O'Brien, Katherine L.; Parashar, Umesh D.; Patel, Manish M.; Rodrigues, Laura C.; Santosham, Mathuram; Scott, J. Anthony; Smith, Peter G.; Sommerfelt, Halvor; Tate, Jacqueline E.; Victor, J. Chris; Whitney, Cynthia G.; Zaidi, Anita K.; Zell, Elizabeth R. 2017. Case-control vaccine effectiveness studies: Data collection, analysis and reporting results. Vaccine. 35: 3303-3308. doi: 10.1016/j.vaccine.2017.04.035
  • Wadhwa, Nitya; Basnet, Sudha; Natchu, Uma Chandra Mouli; Shrestha, Laxman P.; Bhatnagar, Shinjini; Sommerfelt, Halvor; Strand, Tor A; Ramji, Siddarth; Aggarwal, Kailash Chander; Chellani, Harish; Govil, Anuradha; Jajoo, Mamta; Mathur, N.B.; Bhatt, Meenakshi; Mohta, Anup; Ansari, Imran; Basnet, Srijana; Chapagain, Ram H.; Shah, Ganesh P.; Shrestha, Binod M. 2017. Zinc as an adjunct treatment for reducing case fatality due to clinical severe infection in young infants: study protocol for a randomized controlled trial. BMC Pharmacology & Toxicology. 18:56: 1-10. doi: 10.1186/s40360-017-0162-5
  • Aase, Audun; Sommerfelt, Halvor; Petersen, Lizette Balle; Bolstad, Merete; Cox, Rebecca Jane; Langeland, Nina; Guttormsen, Anne Berit; Steinsland, Hans; Skrede, Steinar; Brandtzæg, Per. 2016. Salivary IgA from the sublingual compartment as a novel noninvasive proxy for intestinal immune induction. Mucosal Immunology. 9: 884-893. doi: 10.1038/mi.2015.107
  • Chandyo, Ram Krishna; Ulak, Manjeswori; Sommerfelt, Halvor; Schneede, Jørn; Ueland, Per Magne; Strand, Tor A. 2016. Nutritional intake and status of cobalamin and folate among non-pregnant women of reproductive age in Bhaktapur, Nepal. Nutrients. 8:375. doi: 10.3390/nu8060375
  • Fadnes, Lars T.; Nankabirwa, Victoria; Engebretsen, Ingunn Marie S.; Sommerfelt, Halvor; Birungi, Nancy; Lombard, Carl; Swanevelder, Sonja; Van den Broeck, Jan; Tylleskär, Thorkild; Tumwine, James K. 2016. Effects of an exclusive breastfeeding intervention for six months on growth patterns of 4-5 year old children in Uganda: The cluster-randomised PROMISE EBF trial. BMC Public Health. 16. 9 pages. doi: 10.1186/s12889-016-3234-3
  • Nagot, Nicolas; Kankasa, Chipepo; Tumwine, James K; Meda, Nicolas; Hofmeyr, G. Justus; Vallo, Roselyne; Mwiya, Mwiya; Kwagala, Mary; Traore, Hugues; Sunday, Amwe; Singata, Mandisa; Siuluta, Chafye; Some, Eric; Rutagwera, David; Néboua, Désiré; Ndeezi, Grace; Jackson, Debra; Maréchal, Valérie; Neveu, Dorine; Engebretsen, Ingunn Marie S.; Lombard, Carl; Blanche, Stéphane; Sommerfelt, Halvor; Rekacewicz, Claire; Tylleskär, Thorkild; Van de Perre, Philippe. 2016. Extended pre-exposure prophylaxis with lopinavir-ritonavir versus lamivudine to prevent HIV-1 transmission through breastfeeding up to 50 weeks in infants in Africa (ANRS 12174): a randomised controlled trial. The Lancet. 387: 566-573. doi: 10.1016/S0140-6736(15)00984-8
  • Sow, Samba O.; Muhsen, Khitam; Nasrin, Dilruba; Blackwelder, William C.; Wu, Yukun; Farag, Tamer H.; Panchalingam, Sandra; Sur, Dipika; Zaidi, Anita K.M.; Faruque, Abu Syed Golam; Saha, Debasish; Adegbola, Richard A.; Alonso, Pedro L.; Breiman, Robert F.; Bassat, Quique; Tamboura, Boubou; Sanogo, Doh; Onwuchekwa, Uma; Manna, Byomkesh; Ramamurthy, Thandavarayan; Kanungo, Suman; Ahmed, Shahnawaz; Qureshi, Shahida; Quadri, Farheen; Hossain, Anowar; Das, Sumon K.; Antonio, Martin; Hossain, Mohammad Jahangir; Mandomando, Inacio; Nhampossa, Tacilta; Acácio, Sozinho; Omore, Richard; Oundo, Joseph O.; Ochieng, John B.; Mintz, Eric D.; O'Reilly, Ciare E.; Berkeley, Lynette Y.; Livio, Sofie; Tennant, Sharon M.; Sommerfelt, Halvor; Nataro, James Paul; Ziv-Baran, Tomer; Robins-Browne, Roy M.; Mishcherkin, Vladimir; Zhang, Jixian; Liu, Jie; Houpt, Eric R.; Kotloff, Karen L.; Levine, Myron M. 2016. The Burden of Cryptosporidium Diarrheal Disease among Children < 24 Months of Age in Moderate/High Mortality Regions of Sub-Saharan Africa and South Asia, Utilizing Data from the Global Enteric Multicenter Study (GEMS). PLoS Neglected Tropical Diseases. 10. doi: 10.1371/journal.pntd.0004729
  • Taxt, Arne Michael; Diaz, Yuleima; Aasland, Rein; Clements, John D.; Nataro, James Paul; Sommerfelt, Halvor; Puntervoll, Pål. 2016. Towards rational design of a toxoid vaccine against the heatstable toxin of Escherichia coli. Infection and Immunity. 84: 1239-1249. doi: 10.1128/IAI.01225-15
  • Basnet, Sudha; Sharma, Arun; Mathisen, Maria; Shrestha, Prakash Sunder; Ghimire, Ram Kumar; Shrestha, Dhiraj Man; Valentiner-Branth, Palle; Sommerfelt, Halvor; Strand, Tor. 2015. Predictors of duration and treatment failure of severe pneumonia in hospitalized young nepalese children. PLoS ONE. 10. 11 pages. doi: 10.1371/journal.pone.0122052
  • Chandyo, Ram Krishna; Ulak, Manjeswori; Adhikari, Ramesh K.; Sommerfelt, Halvor; Strand, Tor. 2015. Prevalence of iron deficiency and anemia among young children with acute diarrhea in Bhaktapur, Nepal. Healthcare. 3: 593-606. Published 2015-07-21. doi: 10.3390/healthcare3030593
  • Chola, Lumbwe; Fadnes, Lars T.; Engebretsen, Ingunn Marie S.; Nkonki, Lungiswa; Nankabirwa, Victoria; Sommerfelt, Halvor; Tumwine, James K; Tylleskär, Thorkild; Robberstad, Bjarne. 2015. Cost-effectiveness of peer counselling for the promotion of exclusive breastfeeding in Uganda. PLoS ONE. 10. 18 pages. doi: 10.1371/journal.pone.0142718
  • Lindsay, Brianna; Oundo, Joseph O.; Hossain, Mohammad Anowar; Antonio, Martin; Tamboura, Boubou; Walker, Alan W.; Paulson, Joseph N.; Parkhill, Julian; Omore, Richard; Faruque, Abu Syed Golam; Das, Suman Kumar; Ikumapayi, Usman Nurudeen; Adeyemi, Mitchell; Sanogo, Doh; Saha, Debasish; Sow, Samba O.; Farag, Tamer H.; Nasrin, Dilruba; Li, Shan; Panchalingam, Sandra; Levine, Myron M.; Kotloff, Karen; Magder, Laurence S.; Hungerford, Laura L.; Sommerfelt, Halvor; Pop, Mihai; Nataro, James Paul; Stine, Oscar Colin. 2015. Microbiota that affect risk for shigellosis in children in low-income countries. Emerging Infectious Diseases. 21: 242-250. doi: 10.3201/eid2102.140795
  • Nankabirwa, Victoria; Tumwine, James K; Mugaba, Proscovia M.; Tylleskär, Thorkild; Sommerfelt, Halvor; Van De Perre, Philippe; Engebretsen, Ingunn Ms; Fadnes, Lars Thore; Fjeld, Eli; Fylkesnes, Knut; Klungsøyr, Jørn; Nordrehaug-Åstrøm, Anne; Olsen, Øystein Evjen; Robberstad, Bjarne; Ekström, Eva-Charlotte; Meda, Nicolas; Diallo, Hama; Ouedrago, Thomas; Rouamba, Jeremi; Traore, Bernadette Traore Germain; Zabsonre, Emmanuel; Tumwine, James K; Bwengye, Caleb; Karamagi, Charles; Nankunda, Jolly; Ndeezi, Grace; Wandera, Margaret; Kankasa, Chipepo; Katepa-Bwalya, Mary; Siuluta, Chafye; Siziya, Seter; Jackson, Debra; Chopra, Mickey; Colvin, Mark; Doherty, Tanya; Goga, Ameena; Matizirofa, Lyness; Nkonki, Lungiswa; Sanders, David; Zembe, Wanga. 2015. Child survival and BCG vaccination: A community based prospective cohort study in Uganda. BMC Public Health. 15. 10 pages. doi: 10.1186/s12889-015-1497-8
  • Singh, Prashant; Wadhwa, Nitya; Lodha, Rakesh; Sommerfelt, Halvor; Aneja, Satinder; Natchu, Uma Chandra Mouli; Chandra, Jagdish; Rath, Bimbadhar; Sharma, Vinod Kumar; Kumari, Mohini; Saini, Saviti; Kabra, Sushil Kumar; Bhatnagar, Shinjini; Strand, Tor A. 2015. Predictors of time to recovery in infants with probable serious bacterial infection. PLoS ONE. 10. 11 pages. doi: 10.1371/journal.pone.0124594
  • Engebretsen, Ingunn Marie S.; Jackson, Debra; Fadnes, Lars T.; Nankabirwa, Victoria; Diallo, Abdoulaye Hama; Doherty, Tanya; Lombard, Carl; Swanevelder, Sonja; Nankunda, Jolly Kaharuza; Ramokolo, Vundli; Sanders, David; Wamani, Henry; Meda, Nicolas; Tumwine, James K.; Ekström, Eva-Charlotte M; Van de Perre, Philippe; Kankasa, Chipepo; Sommerfelt, Halvor; Tylleskär, Thorkild. 2014. Growth effects of exclusive breastfeeding promotion by peer counsellors in sub-Saharan Africa: the cluster-randomised PROMISE EBF trial. BMC Public Health. 14. 12 pages. doi: 10.1186/1471-2458-14-633
  • Engebretsen, Ingunn Marie S.; Nankabirwa, Victoria; Doherty, Tanya; Diallo, Hama; Nankunda, Jolly Kaharuza; Fadnes, Lars T.; Ekström, Eva-Charlotte; Ramokolo, Vundli; Meda, Nicolas; Sommerfelt, Halvor; Jackson, Debra; Tylleskär, Thorkild; Tumwine, James K. 2014. Early infant feeding practices in three African countries: the PROMISE-EBF trial promoting exclusive breastfeeding by peer counsellors. International Breastfeeding Journal. 18: 19. doi: 10.1186/1746-4358-9-19
  • Lindsay, Brianna R.; Chakraborty, Subhra; Harro, Clayton; Li, Shan; Nataro, James Paul; Sommerfelt, Halvor; Sack, David A.; Stine, Oscar Colin. 2014. Quantitative PCR and culture evaluation for enterotoxigenic Escherichia coli (ETEC) associated diarrhea in volunteers. FEMS Microbiology Letters. 352: 25-31. doi: 10.1111/1574-6968.12362
  • Mazumder, Sarmila; Taneja, Sunita; Bahl, Rajiv; Mohan, Pavitra; Strand, Tor; Sommerfelt, Halvor; Kirkwood, Betty; Goyal, Nidhi; Van Den Hombergh, Henri; Martines, Jose Carlos; Bhandari, Nita. 2014. Effect of implementation of Integrated Management of Neonatal and Childhood Illness programme on treatment seeking practices for morbidities in infants: cluster randomised trial. BMJ (British Medical Journal). 349:g4988. doi: 10.1136/bmj.g4988
  • Rongsen-Chandola, Temsunaro; Strand, Tor; Goyal, Nidhi; Flem, Elmira; Singh Rathore, Sudeep; Arya, Alok; Winje, Brita Askeland; Lazarus, Robin; Shanmugasundaram, Elango; Babji, Sudhir; Sommerfelt, Halvor; Vainio, M Kirsti; Kang, Gagandeep; Bhandari, Nita. 2014. Effect of withholding breastfeeding on the immune response to a live oral rotavirus vaccine in North Indian infants. Vaccine. 32: A134-A139. doi: 10.1016/j.vaccine.2014.04.078
  • Skrede, Steinar; Steinsland, Hans; Sommerfelt, Halvor; Aase, Audun; Brandtzæg, Per; Langeland, Nina; Cox, Rebecca Jane; Sævik, Marianne; Wallevik, Marita; Skutlaberg, Dag Harald; Tellevik, Marit Gjerde; Sack, David A.; Nataro, James Paul; Guttormsen, Anne Berit. 2014. Experimental infection of healthy volunteers with enterotoxigenic Escherichia coli wild-type strain TW10598 in a hospital ward. BMC Infectious Diseases. 14. 9 pages. doi: 10.1186/1471-2334-14-482
  • Taxt, Arne Michael; Diaz, Yuleima; Bacle, Amélie; Grauffel, Cédric; Reuter, Nathalie; Aasland, Rein; Sommerfelt, Halvor; Puntervoll, Pål. 2014. Characterization of immunological cross-reactivity between enterotoxigenic Escherichia coli heat-stable toxin and human guanylin and uroguanylin. Infection and Immunity. 82: 2913-2922. doi: 10.1128/IAI.01749-14
  • Ulak, Manjeswori; Chandyo, Ram Krishna; Adhikari, Ramesh K.; Sharma, Pushpa R.; Sommerfelt, Halvor; Refsum, Helga; Strand, Tor. 2014. Cobalamin and folate status in 6 to 35 months old children presenting with acute diarrhea in Bhaktapur, Nepal. PLoS ONE. 9. doi: 10.1371/journal.pone.0090079
  • Kotloff, Karen L.; Nataro, James Paul; Blackwelder, William C.; Nasrin, Dilruba; Farag, Tamer H.; Panchalingam, Sandra; Wu, Yukun; Sow, Samba O.; Sur, Dipika; Breiman, Robert F.; Faruque, Abu Syed Golam; Zaidi, Anita K.M.; Saha, Debasish; Alonso, Pedro L.; Tamboura, Boubou; Sanogo, Doh; Onwuchekwa, Uma; Manna, Byomkesh; Ramamurthy, Thandavarayan; Kanungo, Suman; Ochieng, John B.; Omore, Richard; Oundo, Joseph O.; Hossain, Anowar; Das, Sumon K.; Ahmed, Shahnawaz; Qureshi, Shahida; Quadri, Farheen; Adegbola, Richard A.; Antonio, Martin; Hossain, Mohammad Jahangir; Akinsola, Adebayo; Mandomando, Inacio; Nhampossa, Tacilta; Acácio, Sozinho; Biswas, Kousick; O'Reilly, Ciare E.; Mintz, Eric D.; Berkeley, Lynette Y.; Muhsen, Khitam; Sommerfelt, Halvor; Robins-Browne, Roy M.; Levine, Myron M. 2013. Burden and aetiology of diarrhoeal disease in infants and young children in developing countries (the Global Enteric Multicenter Study, GEMS): a prospective, case-control study. The Lancet. 382: 209-222. doi: 10.1016/S0140-6736(13)60844-2
  • Lindsay, Brianna; Ochieng, John B.; Ikumapayi, Usman N.; Toure, Aliou; Ahmed, Dilruba; Li, Shan; Panchalingam, Sandra; Levine, Myron; Kotloff, Karen; Rasko, David A.; Morris, Carolyn R.; Juma, Jane; Fields, Barry S.; Dione, Michel; Malle, Dramane; Becker, Stephen M.; Houpt, Eric R.; Nataro, James Paul; Sommerfelt, Halvor; Pop, Mihai; Oundo, Joe; Antonio, Martin; Hossain, Anowar; Tamboura, Boubou; Stine, O. Colin. 2013. Quantitative PCR for Detection of Shigella Improves Ascertainment of Shigella Burden in Children with Moderate-to-Severe Diarrhea in Low-Income Countries. Journal of Clinical Microbiology. 51: 1740-1746. doi: 10.1128/JCM.02713-12
  • Strand, Tor A; Taneja, Sunita; Ueland, Per Magne; Refsum, Helga; Bahl, Rajiv; Schneede, Jørn; Sommerfelt, Halvor; Bhandari, Nita. 2013. Cobalamin and folate status predicts mental development scores in North Indian children 12-18 mo of age. American Journal of Clinical Nutrition. 97: 310-317. doi: 10.3945/ajcn.111.032268
  • Basnet, Sudha; Shrestha, Prakash S.; Sharma, Arun; Mathisen, Maria; Prasai, Renu; Bhandari, Nita; Adhikari, Ramesh K.; Sommerfelt, Halvor; Valentiner-Branth, Palle; Strand, Tor A. 2012. A randomized controlled trial of zinc as adjuvant therapy for severe pneumonia in young children. Pediatrics. 129: 701-708. doi: 10.1542/peds.2010-3091
  • Bhandari, Nita; Mazumder, Sarmila; Taneja, Sunita; Sommerfelt, Halvor; Strand, Tor A. 2012. Effect of implementation of Integrated Management of Neonatal and Childhood Illness (IMNCI) programme on neonatal and infant mortality: cluster randomised controlled trial. BMJ (British Medical Journal). 344. 13 pages. doi: 10.1136/bmj.e1634
  • Bhatnagar, Shinjini; Natchu, Uma Chandra Mouli; Wadhwa, Nitya; Lodha, Rakesh; Sommerfelt, Halvor; Strand, Tor A. 2012. Zinc for probable serious bacterial infection in infants reply. The Lancet. 380: 1144-1144.
  • Bhatnagar, Shinjini; Wadhwa, Nitya; Aneja, Satinder; Lodha, Rakesh; Kabra, Sushil Kabra; Natchu, Uma Chandra Mouli; Sommerfelt, Halvor; Dutta, Ashok Kumar; Chandra, Jagdish; Rath, Bimbadhar; Sharma, Mamta; Sharma, Vinod Kumar; Kumari, Mohini; Strand, Tor Arne. 2012. Zinc as adjunct treatment in infants aged between 7 and 120 days with probable serious bacterial infection: a randomised, double-blind, placebo-controlled trial. The Lancet. 379: 2072-2078. doi: 10.1016/S0140-6736(12)60477-2
  • Blackwelder, William C.; Biswas, Kousick; Wu, Yukun; Kotloff, Karen L.; Farag, Tamer H.; Nasrin, Dilruba; Graubard, Barry I.; Sommerfelt, Halvor; Levine, Myron M. 2012. Statistical methods in the Global Enteric Multicenter Study (GEMS). Clinical Infectious Diseases. 55: S246-S253. doi: 10.1093/cid/cis788
  • Diallo, Abdoulaye Hama; Meda, Nicolas; Sommerfelt, Halvor; Traore, Germain S; Cousens, Simon; Tylleskar, Thorkild. 2012. The high burden of infant deaths in rural Burkina Faso: a prospective community-based cohort study. BMC Public Health. 12. 15 pages. doi: 10.1186/1471-2458-12-739
  • Kotloff, Karen L.; Blackwelder, William C.; Nasrin, Dilruba; Nataro, James Paul; Farag, Tamer H.; van Eijk, Annemieke; Adegbola, Richard A.; Alonso, Pedro L.; Breiman, Robert F.; Faruque, Abu Syed Golam; Saha, Debasish; Sow, Samba O.; Sur, Dipika; Zaidi, Anita K.M.; Biswas, Kousick; Panchalingam, Sandra; Clemens, John D.; Cohen, Dani; Glass, Roger I; Mintz, Eric D.; Sommerfelt, Halvor; Levine, Myron M. 2012. The global enteric multicenter study (GEMS) of diarrheal disease in infants and young children in developing countries: epidemiologic and clinical methods of the case/control study. Clinical Infectious Diseases. 55: S232-S245. doi: 10.1093/cid/cis753
  • Nagot, Nicolas; Kankasa, Chipepo; Meda, Nicolas; Hofmeyr, Justus; Nikodem, Cheryl; Tumwine, James K.; Karamagi, Charles Amnon S.; Sommerfelt, Halvor; Neveu, Dorine; Tylleskar, Thorkild; Van de Perre, Philippe. 2012. Lopinavir/Ritonavir versus Lamivudine peri-exposure prophylaxis to prevent HIV-1 transmission by breastfeeding: the PROMISE-PEP trial Protocol ANRS 12174. BMC Infectious Diseases. 12. 11 pages. doi: 10.1186/1471-2334-12-246
  • Sommerfelt, Halvor; Steinsland, Hans; van der Merwe, Lize; Blackwelder, William C.; Nasrin, Dilruba; Faraq, Tamer H.; Kotloff, Karen L.; Levine, Myron M.; Gjessing, Håkon K. 2012. Case/Control studies with follow-up: constructing the source population to estimate effects of risk factors on development, disease, and survival. Clinical Infectious Diseases. 55: s262-s270. doi: 10.1093/cid/cis802
  • Strand, Tor A; Sharma, Pushpa R; Gjessing, Håkon K.; Ulak, Manjeswori; Chandyo, Ram Krishna; Adhikari, Ramesh K; Sommerfelt, Halvor. 2012. Risk factors for extended duration of acute diarrhea in young children. PLoS ONE. 7. doi: 10.1371/journal.pone.0036436
  • Tylleskar, Thorkild; Diallo, Hama; Nankabirwa, Victoria; Meda, Nicolas; Tumwine, James; Sommerfelt, Halvor. 2012. High perinatal mortality in Burkina Faso and Uganda. Acta Obstetricia et Gynecologica Scandinavica. 91: 138-138.
  • Bolstad, Merete; Sommerfelt, Halvor; Brandtzæg, Per; Aase, Audun. 2011. Stability of secretory IgA in saliva. Scandinavian Journal of Immunology. 73: 381-382. doi: 10.1111/j.1365-3083.2011.02516.x
  • Del Canto, Felipe; Valenzuela, Patricio; Cantero, Lidia; Bronstein, Jonathan; Blanco, Jesus E; Blanco, Jorge; Prado, Valeria; Levine, Myron; Nataro, James Paul; Sommerfelt, Halvor; Vidal, Roberto. 2011. Distribution of Classical and Nonclassical Virulence Genes in Enterotoxigenic Escherichia coli Isolates from Chilean Children and tRNA Gene Screening for Putative Insertion Sites for Genomic Islands. Journal of Clinical Microbiology. 49: 3198-3203. doi: 10.1128/JCM.02473-10
  • Fadnes, Lars T.; Jackson, Debra; Engebretsen, Ingunn Marie S.; Zembe, Wanga; Sanders, David; Sommerfelt, Halvor; Tylleskar, Thorkild. 2011. Vaccination coverage and timeliness in three South African areas: a prospective study. BMC Public Health. 11. 11 pages. doi: 10.1186/1471-2458-11-404
  • Fadnes, Lars T.; Nankabirwa, Victoria; Sommerfelt, Halvor; Tylleskar, Thorkild; Tumwine, James K; Engebretsen, Ingunn Marie S. 2011. Is vaccination coverage a good indicator of age-appropriate vaccination? A prospective study from Uganda. Vaccine. 29: 3564-3570. doi: 10.1016/j.vaccine.2011.02.093
  • Kvåle, Gunnar; Sommerfelt, Halvor. 2011. Internasjonal satsing for bedre helse - Norges rolle. Tidsskrift for Den norske legeforening. 131: 1796-1798.
  • Lie, Sverre O.; Gulati, Dipali; Sommerfelt, Halvor; Sundby, Johanne. 2011. Millennium development goals for health--will we reach them by 2015? Tidsskrift for Den norske legeforening. 131: 1904-1907. doi: 10.4045/tidsskr.11.0618
  • Manger, Mari Skar; Strand, Tor A; Taneja, Sunita; Refsum, Helga; Ueland, Per Magne; Nygård, Ottar; Schneede, Jørn; Sommerfelt, Halvor; Bhandari, Nita. 2011. Cobalamin Status Modifies the Effect of Zinc Supplementation on the Incidence of Prolonged Diarrhea in 6-to 30-Month-Old North Indian Children. Journal of Nutrition. 141: 1108-1113. doi: 10.3945/jn.110.127415
  • Manger, Mari Skar; Taneja, Sunita; Strand, Tor A; Ueland, Per Magne; Refsum, Helga; Schneede, Jørn; Nygård, Ottar; Sommerfelt, Halvor; Bhandari, Nita. 2011. Poor folate status predicts persistent diarrhea in 6- to 30-month-old north Indian children. Journal of Nutrition. 141: 2226-2232. doi: 10.3945/jn.111.144220
  • Mathisen, Maria; Basnet, Sudha; Sharma, Arun; Shrestha, Prakash S; Sharma, Biswa Nath; Valentiner-Branth, Palle; Sommerfelt, Halvor; Strand, Tor A. 2011. RNA viruses in young Nepalese children hospitalized with severe pneumonia. The Pediatric Infectious Disease Journal. 30: 1032-1036. doi: 10.1097/INF.0b013e31822f845f
  • Nankabirwa, Victoria; Tumwine, James K; Tylleskar, Thorkild; Nankunda, Jolly Kaharuza; Sommerfelt, Halvor. 2011. Perinatal mortality in Eastern Uganda: A community based prospective cohort study. PLoS ONE. 6. 7 pages. doi: 10.1371/journal.pone.0019674
  • Nankabirwa, Victoria; Tylleskar, Thorkild; Nankunda, Jolly Kaharuza; Engebretsen, Ingunn Marie S.; Sommerfelt, Halvor; Tumwine, James K. 2011. Prevalence of malaria parasitaemia among infants in Uganda and its association with breastfeeding, peer counselling and vitamin a supplementation. Tropical medicine & international health. 16: 97-97.
  • Nankabirwa, Victoria; Tylleskar, Thorkild; Nankunda, Jolly Kaharuza; Engebretsen, Ingunn Marie S.; Sommerfelt, Halvor; Tumwine, James K. 2011. Malaria Parasitaemia among Infants and Its Association with Breastfeeding Peer Counselling and Vitamin A Supplementation: A Secondary Analysis of a Cluster Randomized Trial. PLoS ONE. 6. 8 pages. doi: 10.1371/journal.pone.0021862
  • Sahl, Jason W.; Steinsland, Hans; Redman, Julia C.; Angiuoli, Samuel V.; Nataro, James Paul; Sommerfelt, Halvor; Rasko, David A. 2011. A Comparative genomic analysis of diverse clonal types of enterotoxigenic escherichia coli reveals pathovar-specific conservation. Infection and Immunity. 79: 950-960. doi: 10.1128/IAI.00932-10
  • Tylleskar, Thorkild; Jackson, Debra; Meda, Nicolas; Engebretsen, Ingunn Marie S.; Chopra, Mickey; Diallo, Abdoulaye Hama; Doherty, Tanja; Ekström, Eva-Charlotte M; Fadnes, Lars T.; Goga, Ameena; Kankasa, Chipepo; Klungsøyr, Jørn Ivar; Lombard, Carl; Nankabirwa, Victoria; Nankunda, Jolly Kaharuza; Van de Perre, Philippe; Sanders, David; Shanmugam, Rebecca; Sommerfelt, Halvor; Wamani, Henry; Tumwine, James K. 2011. Exclusive breastfeeding promotion by peer counsellors in sub-Saharan Africa (PROMISE-EBF): a cluster-randomised trial. The Lancet. 378: 420-427. doi: 10.1016/S0140-6736(11)60738-1
  • Wadhwa, Natya; Natchu, Uma Chandra Mouli; Sommerfelt, Halvor; Strand, Tor A; Kapoor, V ishal; Saini, Savita; Kainth, Udaypal S.; Bhatnagar, Shinjini. 2011. ORS containing zinc does not reduce duration or stool volume of acute diarrhea in hospitalized children. Journal of Pediatric Gastroenterology and Nutrition - JPGN. 53: 161-167. doi: 10.1097/MPG.0b013e318213ca55
  • Chandyo, Ram K; Shrestha, Prakash S; Valentiner-Branth, Palle; Mathisen, Maria; Basnet, Sudha; Ulak, Manjeswori; Adhikari, Ramesh K; Sommerfelt, Halvor; Strand, Tor Arne. 2010. Two weeks of zinc administration to Nepalese children with pneumonia does not reduce the incidence of pneumonia or diarrhea during the next six months. Journal of Nutrition. 140: 1677-1682. doi: 10.3945/jn.109.117978
  • Diallo, Abdoulaye Hama; Meda, Nicolas; Zabsonre, Emmanuel; Sommerfelt, Halvor; Cousens, Simon; Tylleskar, Thorkild. 2010. Perinatal mortality in rural Burkina Faso: a prospective community-based cohort study. BMC Pregnancy and Childbirth. 10. 9 pages. doi: 10.1186/1471-2393-10-45
  • Fleckenstein, James M; Hardwidge, Philip R; Munson, George P; Rasko, David A; Sommerfelt, Halvor; Steinsland, Hans. 2010. Molecular mechanisms of enterotoxigenic Escherichia coli infection. Microbes and infection. 12: 89-98. doi: 10.1016/j.micinf.2009.10.002
  • Mapaseka, Seheri Luyanda; Dewar, John Barr; van der Merwe, Lize; Geyer, Annelise; Tumbo, John; Zweygarth, Monika; Bos, Pieter; Esona, Mathew Dioh; Steele, A Duncan; Sommerfelt, Halvor. 2010. Prospective hospital-based surveillance to estimate rotavirus disease burden in the Gauteng and North West Province of South Africa during 2003-2005. Journal of Infectious Diseases. 202: S131-S138. doi: 10.1086/653558
  • Mathisen, Maria; Strand, Tor Arne; Sharma, Biswa N; Chandyo, Ram K; Valentiner-Branth, Palle; Basnet, Sudha; Adhakari, Ramesh K; Hvidsten, Dag; Shrestha, Prakash S; Sommerfelt, Halvor. 2010. Clinical presentation and severity of viral community-acquired pneumonia in young Nepalese children. The Pediatric Infectious Disease Journal. 29: e1-e6. doi: 10.1097/INF.0b013e3181c2a1b9
  • Mathisen, Maria; Strand, Tor Arne; Valentiner-Branth, Palle; Chandyo, Ram Krishna; Basnet, Sudha; Sharma, Biswa N; Adhikari, Ramesh K; Hvidsten, Dag; Shrestha, Prakash S; Sommerfelt, Halvor. 2010. Respiratory viruses in Nepalese children with and without pneumonia: a case-control study. The Pediatric Infectious Disease Journal. 29: 731-735. doi: 10.1097/INF.0b013e3181d9bcce
  • Nankabirwa, Victoria; Tylleskar, Thorkild; Tumwine, James K.; Sommerfelt, Halvor. 2010. Maternal education is associated with vaccination status of infants less than 6 months in Eastern Uganda: a cohort study. BMC Pediatrics. 10. doi: 10.1186/1471-2431-10-92
  • Steinsland, Hans; Lacher, David W; Sommerfelt, Halvor; Whittam, Thomas S. 2010. Ancestral Lineages of Human Enterotoxigenic Escherichia coli. Journal of Clinical Microbiology. 48: 2916-2924. doi: 10.1128/JCM.02432-09
  • Taneja, Sunita; Strand, Tor A; Sommerfelt, Halvor; Bahl, Rajiv; Bhandari, Nita. 2010. Zinc supplementation for four months does not affect growth in young north Indian children. Journal of Nutrition. 140: 630-634. doi: 10.3945/jn.109.115766
  • Taxt, Arne Michael; Aasland, Rein; Sommerfelt, Halvor; Nataro, James; Puntervoll, Pål. 2010. Heat-stable enterotoxin of enterotoxigenic escherichia coli as a vaccine target. Infection and Immunity. 78: 1824-1831. doi: 10.1128/IAI.01397-09
  • Valentiner-Branth, Palle; Shrestha, Prakash S; Chandyo, Ram K; Mathisen, Maria; Basnet, Sudha; Bhandari, Nita; Adhikari, Ramesh K; Sommerfelt, Halvor; Strand, Tor Arne. 2010. A randomized controlled trial of the effect of zinc as adjuvant therapy in children 2-35 mo of age with severe or nonsevere pneumonia in Bhaktapur, Nepal. American Journal of Clinical Nutrition. 91: 1667-1674. doi: 10.3945/ajcn.2009.28907
  • Chandyo, RK; Strand, Tor Arne; Mathisen, M; Ulak, M; Adhikari, RK; Bolann, BJ; Sommerfelt, Halvor. 2009. Zinc deficiency is common among healthy women of reproductive age in Bhaktapur, Nepal. Journal of Nutrition. 139: 594-597. doi: 10.3945/jn.108.102111
  • Chandyo, Ram Krishna; Shrestha, Prakash S.; Valentiner-Branth, P; Mathisen, Maria; Basnet, Sudha; Ulak, M; Adhikari, RK; Sommerfelt, Halvor; Strand, Tor A. 2009. EFFICACY OF SHORT COURSE ORAL ZINC GIVEN DURING PNEUMONIA ON SUBSEQUENT MORBIDITY AMONG YOUNG CHILDREN IN NEPAL. Annals of Nutrition and Metabolism. 55: 264-264.
  • Kvåle, G; Sommerfelt, Halvor. 2009. Measuring the impact of health interventions in complex settings: need for a common evaluation framework. Tropical medicine & international health. 14: S6-S7. doi: 10.1111/j.1365-3156.2009.02352.x
  • Kvåle, Gunnar; Sommerfelt, Halvor. 2009. Measuring the impact of health interventions in complex settings: need for a common evaluation framework. European Journal of Tropical Medicine and International Health. 14: 6-7.
  • Kvåle, Gunnar; Sommerfelt, Halvor. 2009. Bistand for bedre helse - Norges rolle. Tidsskrift for Den norske legeforening. 129: 2471. doi: 10.4045/tidsskr.09.1158
  • Manger, Mari Skar; Bhan, Maharaj Kishan; Strand, Tor A; Taneja, Sunita; Bahl, Rajiv; Sommerfelt, Halvor; Refsum, Helga; Ueland, Per Magne; Schneede, Jørn; Bhandari, Nita. 2009. DOES VITAMIN B12 OR FOLATE STATUS MODIFY THE IMPACT OF ZINC SUPPLEMENTATION ON THE INCIDENCE OF DIARRHEA? Annals of Nutrition and Metabolism. 55: 261-262.
  • Mathisen, Maria; Strand, Tor A; Sharma, Biswa N; Chandyo, Ram K; Valentiner-Branth, Palle; Basnet, Sudha; Adhikari, Ramesh K; Hvidsten, Dag; Shrestha, Prakash S; Sommerfelt, Halvor. 2009. RNA viruses in community-acquired childhood pneumonia in semi-urban Nepal; a cross-sectional study. BMC Medicine. 7. 12 pages. doi: 10.1186/1741-7015-7-35
  • Strand, Tor A; Sharma, PR; Chandyo, RK; Refsum, Helga; Ulak, M; Adhikari, RK; Sommerfelt, Halvor. 2009. FOLATE AND VITAMIN B12 STATUS IN YOUNG NEPALESE CHILDREN. Annals of Nutrition and Metabolism. 55: 488-489.
  • Taneja, S.; Strand, Tor A; Sommerfelt, Halvor; Bahl, Rajiv; Bhandari, N. 2009. ZINC SUPPLEMENTATION FOR FOUR MONTHS DOES NOT HAVE A SUBSTANTIAL EFFECT ON GROWTH IN YOUNG NORTH INDIAN CHILDREN. Annals of Nutrition and Metabolism. 55: 689-689.
  • Tylleskär, Thorkild; Chopra, Mickey; Diallo, Hama; Doherty, Tanya M; Ekström, Eva-Charlotte M; Engebretsen, Ingunn Marie S.; Goga, Ameena; Kankasa, Chipepo; Klungsøyr, Jørn Ivar; Lombard, Carl; Meda, Nicolas; Nankabirwa, Victoria; Nankunda, Jolly Kaharuza; Shanmugam, Rebecca; Sommerfelt, Halvor; Tumwine, James K.; Van de Perre, Philippe; Wamani, Henry. 2009. Preliminary results from the multi-centre cluster-randomised behaviour intervention trial PROMISE EBF: breastfeeding promotion in Sub-Saharan Africa. Annals of Nutrition and Metabolism. 55: 99-99.
  • Checkley, W; Buckley, G; Gilman, RH; Assis, AM; Guerrant, RL; Morris, SS; Mølbak, Kåre; Valentiner-Branth, Palle; Lanata, CF; Black, RE; Barreto, ML; Santos, LM; Moore, SR; Lima, AA; Pinkerton, RC; Aaby, Peter; Cabrera, LZ; Bern, C; Sterling, CR; Epstein, LD; Arthur, P; Gyapong, J; Kirkwood, BR; Ross, DA; Brown, KH; Becker, S.; Moulton, L; Cousens, SN; Perch, Michael; Fischer, Thea Kølsen; Sommerfelt, Halvor; Steinsland, Hans; Verastegui, H. 2008. Multi-country analysis of the effects of diarrhoea on childhood stunting. International Journal of Epidemiology. 37: 816-830. doi: 10.1093/ije/dyn099
  • Mathisen, Maria; Strand, Tor A; Sharma, Biswa N.; Chandyo, Ram Krishna; Valentiner-Branth, Palle; Basnet, Sudha; Adhikari, Ramesh K; Hvidsten, Dag; Shrestha, Prakash S.; Sommerfelt, Halvor. 2008. RNA Viruses Are an Important Cause of Community-acquired Pneumonia in Nepalese Children Living in a Semi-urban District in Kathmandu Valley. International Journal of Infectious Diseases. 12: E56-E56. doi: 10.1016/j.ijid.2008.05.030
  • Chandyo, Ram Krishna; Strand, Tor A; Ulvik, Rune Johan; Adhikari, Ramesh K; Ulak, Manju S; Dixit, Hemang; Sommerfelt, Halvor. 2007. Prevalence of iron deficiency and anemia among healthy women of reproductive age in Bhaktapur, Nepal. European Journal of Clinical Nutrition. 61: 262-269. doi: 10.1038/sj.ejcn.1602508
  • Strand, Tor A; Taneja, Sunita; Bhandari, Nita; Refsum, Helga; Ueland, Per Magne; Gjessing, Håkon K.; Bahl, Rajiv; Schneede, Joern; Bhan, Maharaj K; Sommerfelt, Halvor. 2007. Folate, but not vitamin B-12 status, predicts respiratory morbidity in north Indian children. American Journal of Clinical Nutrition. 86: 139-144.
  • Taneja, Sunita; TaneJa, S; Bhandari, Nita; Strand, Tor A; Sommerfelt, Halvor; Sonnnerfelt, H; Refsum, Helga; Ueland, Per Magne; Schneede, Jørn; Bahl, Rajiv; Bhan, Maharaj Kishan. 2007. Cobalamin and folate status in infants and young children in a low-to-middle income community in India. American Journal of Clinical Nutrition. 86: 1302-1309.
  • Valentiner-Branth, Palle; Perch, Michael; Nielsen, Jens; Steinsland, Hans; Garly, May-Lill; Fischer, Thea Kølsen; Sommerfelt, Halvor; Mølbak, Kåre; Aaby, Peter. 2007. Community cohort study of Cryptosporidium parvum infections: sex-differential incidences associated with BCG and diptheria-tetanus-pertussis vaccinations. Vaccine. 25: 2733-2741. doi: 10.1016/j.vaccine.2006.01.035
  • Kvåle, Gunnar; Sommerfelt, Halvor; Fylkesnes, Knut. 2005. Intervention studies for improving global health and health care: an important arena for epidemiologists. Norsk Epidemiologi. 15: 123-126.
  • Robberstad, Bjarne; Strand, Tor A; Black, Robert E; Sommerfelt, Halvor. 2004. Cost-effectiveness of zinc as adjunct therapy for acute childhood diarrhoea in developing countries. Bulletin of the World Health Organization. 87: 523-531.
  • Steinsland, Hans; Valentiner-Branth, Palle; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2004. Clonal relatedness of enterotoxigenic Escherichia coli strains isolated from a cohort of young children in Guinea-Bissau. Journal of Clinical Microbiology. 42: 3100-3107.
  • Steinsland, Hans; Valentiner-Branth, Palle; Gjessing, Håkon K; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2004. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. Ugeskrift for læger. 166: 4051-4053.
  • Strand, Tor A; Adhikari, Ramesh K; Chandyo, Ram K; Sharma, Pushpa R; Sommerfelt, Halvor. 2004. Predictors of plasma zinc concentrations in children with acute diarrhea. American Journal of Clinical Nutrition. 79: 451-456. Published 2004-04-01.
  • Valvatne, Håvard; Steinsland, Hans; Grewal, Harleen; Mølbak, Kåre; Vuust, Jens; Sommerfelt, Halvor. 2004. Identification and molecular characterization of the gene encoding coli surface antigen 20 of enterotoxigenic Escherichia coli. FEMS Microbiology Letters. 239: 131-138. doi: doi:10.1016/j.femsle.2004.08.0
  • Benn, CS; Bale, C; Sommerfelt, Halvor; Friis, Henrik; Aaby, Peter. 2003. Vitamin A supplementation and childhood mortality: amplification of the non-specific effects of vaccines? International Journal of Epidemiology. 32: 822-828.
  • Fischer, Thea Kølsen; Page, NA; Griffin, D; Eugen-Olsen, J; Pedersen, AG; Valentiner-Branth, Palle; Mølbak, Kåre; Sommerfelt, Halvor; Munk Nielsen, N. 2003. Characterization of nontypeable rotavirus strains from Guinea-Bissau: Identification of G8 and G9 types and a high frequency of mixed infections. Virology. 311: 125-133.
  • Karlsen, Tom Hemming; Sommerfelt, Halvor; Klomstad, Skjalg; Andersen, Per Kragh; Strand, Tor A; Ulvik, Rune Johan; Åhrén, Christina; Grewal, Harleen M. S. 2003. Intestinal and systemic immune responses to an oral B-subunit-whole-cell cholera vaccine administered during zinc supplementation. Infection and Immunity. 71: 3909-3913.
  • Steinsland, Hans; Valentiner-Branth, Palle; Gjessing, Håkon K; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 362: 286-291.
  • Steinsland, Hans; Valentiner-Branth, Palle; Gjessing, Håkon K; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 362: 286-291.
  • Steinsland, Hans; Valentiner-Branth, Palle; Grewal, Harleen M. S.; Gaastra, Wim; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Development and evaluation of genotypic assays for the detection and characterization of enterotoxigenic Escherichia coli. Diagnostic microbiology and infectious disease. 45: 97-105.
  • Strand, Tor A; Aaberge, IS; Maage, Amund; Ulvestad, Elling; Sommerfelt, Halvor. 2003. The immune response to pneumococcal polysaccharide vaccine in zinc depleted mice. Scandinavian Journal of Immunology. 58: 76-80.
  • Strand, Tor A; Hollingshead, SK; Julshamn, K; Briles, DE; Blomberg, Bjørn; Sommerfelt, Halvor. 2003. Effects of zinc deficiency and pneumococcal surface protein A immunization on zinc status and the risk of severe infection in mice. Infection and Immunity. 71: 2009-2013.
  • Strand, Tor A; Hollingshead, SK; Julshamn, Kåre; Briles, David E; Blomberg, Bjørn; Sommerfelt, Halvor. 2003. Effects of zinc deficiency and pneumococcal surface protein A immunization on zinc status and the risk of severe infection in mice. Infection and Immunity. 71: 2009-2013.
  • Valentiner-Branth, Palle; Steinsland, Hans; Fischer, Thea Kølsen; Perch, M; Scheutz, F; Dias, F; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Cohort study of Guinean children: incidence, pathogenicity, conferred protection and attributable risk for enteropathogens during the first 2 years of life. Journal of Clinical Microbiology. 41: 4238-4245.
  • Valentiner-Branth, Palle; Steinsland, Hans; Fischer, Thea Kølsen; Perch, Michael; Scheutz, Flemming; Dias, Fransisco; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2003. Cohort study of Guinean children: incidence, pathogenicity, conferred protection and attributable risk for enteropathogens during the first 2 years of life. Journal of Clinical Microbiology. 41.
  • Bahl, Rajiv; Bhandari, Nita; Saksena, M.; Strand, Tor A; Kumar, G.T.; Bhan, Maharaj Kishan; Sommerfelt, Halvor. 2002. Efficacy of Zinc-fortified oral rehydration solution in 6- to 35-month-old children with acute diarrhea. Journal of Pediatrics. 141: 677-682.
  • Bhandari, Nita; Bahl, Rajiv; Taneja, S.; Strand, Tor A; Mølbak, Kåre; Ulvik, Rune Johan; Sommerfelt, Halvor; Bhan, Maharaj Kishan. 2002. Effect of routine zinc supplementation on pneumonia in children aged 6 months to 3 years: randomised controlled trial in an urban slum. BMJ (British Medical Journal). 324: 1358-1362.
  • Bhandari, Nita; Bahl, Rajiv; Taneja, S.; Strand, Tor A; Mølbak, Kåre; Ulvik, Rune Johan; Sommerfelt, Halvor; Bhan, Maharaj Kishan. 2002. Substantial Reduction in Severe Diarrheal Morbidity by Daily Zinc Supplementation in Young North Indian Children. Pediatrics. 109: 86.
  • Fischer, Thea Kølsen; Valentiner-Branth, Palle; Steinsland, Hans; Perch, Michael; Santos, Gina; Aaby, P; Mølbak, Kåre; Sommerfelt, Halvor. 2002. Protective immunity after natural rotavirus infection. A community cohort study of newborn children in Guinea-Bisau, West Africa. Journal of Infectious Diseases. 186: 593-597.
  • Gaastra, W.; Sommerfelt, Halvor; van Dijk, L; Kusters, JG; Svennerholm, AM; Grewal, Harleen M. S. 2002. Antigenic variation within the subunit protein of members of the colonization factor antigen I group of fimbrial proteins in human enterotoxigenic Escherichia coli. International Journal of Medical Microbiology. 292: 43-50.
  • Steinsland, Hans; Valentiner-Branth, Palle; Perch, Michael; Dias, Francisco; Fischer, Thea Kølsen; Aaby, Peter; Mølbak, Kåre; Sommerfelt, Halvor. 2002. Enterotoxigenic Escherichia coli infections and diarrhea in a cohort of young children in Guinea-Bissau. Journal of Infectious Diseases. 186. 1740-1747.
  • Strand, Tor A; Chandyo, RK; Bahl, Rajiv; Sharma, PR; Adhikari, RK; Bhandari, Nita; Ulvik, Rune Johan; Mølbak, Kåre; Bhan, Maharaj Kishan; Sommerfelt, Halvor. 2002. Effectiveness and efficacy of zinc for the treatment of acute diarrhea in young children. Pediatrics. 109: 898-903.
  • Valvatne, Håvard; Steinsland, Hans; Sommerfelt, Halvor. 2002. Clonal clustering and colonization factors among thermolabile and porcine thermostable enterotoxin-producing Escherichia coli. Acta Pathologica, Microbiologica et Immunologica Scandinavica (APMIS). 110: 665-672.
  • Bhan, Maharaj Kishan; Sommerfelt, Halvor; Strand, Tor A. 2001. Micronutrient deficiency in children. Commentary. British Journal of Nutrition. 85: 199-203.
  • Grewal, Harleen M. S.; Sommerfelt, Halvor. 2001. Genotypic simultaneous detection of enterotoxigenic Escherichia coli harbouring genes for colonisation factor antigen I, coli surface antigens 1, 2, 4, 17, or putative colonisation factor O166. Acta Pathologica, Microbiologica et Immunologica Scandinavica (APMIS). 109: 447-453.
  • Strand, Tor A; Briles, DE; Gjessing, HK; Maage, Amund; Bhan, Maharaj Kishan; Sommerfelt, Halvor. 2001. Pneumococcal pulmonary infection, septicemia and survival in young zinc-depleted mice. British Journal of Nutrition. 86: 301-306.
  • Valentiner-Branth, Palle; Steinsland, Hans; Santos, Gina; Perch, Michael; Bergtrup, Kamilla; Bhan, Maharaj Kishan; Dias, Fransisco; Aaby, Peter; Sommerfelt, Halvor; Mølbak, Kåre. 2001. Community-based controlled trial of dietary management of children with persistent diarrhea: sustained beneficial effect on ponderal and linear growth. American Journal of Clinical Nutrition. 73: 968-974.
  • Fischer, Thea Kølsen; Steinsland, Hans; Mølbak, Kåre; Ca, Rui; Gentsch, Jon R.; Valentiner-Branth, Palle; Aaby, Peter; Sommerfelt, Halvor. 2000. Genotype Profiles of Rotavirus Strains from Children in a Suburban Community in Guinea-Bissau, Western Africa. Journal of Clinical Microbiology. 38: 264-267.
  • Grewal, Harleen M. S.; Karlsen, Tom Hemming; Vetvik, H; Ahren, C; Gjessing, Håkon K; Sommerfelt, Halvor; Haneberg, B. 2000. Measurement of specific IgA in faecal extracts and intestinal lavage fluid for monitoring of mucosal immune responses. JIM - Journal of Immunological Methods. 239: 53-62.
  • Grewal, Harleen M. S.; Vetvik, H; Karlsen, Hemming T; Ahren, C; Gjessing, HK; Sommerfelt, Halvor; Haneberg, B. 2000. The measurement of specific IgA in fecal extracts and in intestinal lavage fluid for the monitoring of mucosal immune responses. JIM - Journal of Immunological Methods. 239: 53-62.
  • Valentiner-Brandt, Palle; Steinsland, Hans; Gjessing, Håkon K; Santos, Gina; Bhan, Maharaj; Aaby, Peter; Sommerfelt, Halvor; Mølbak, Kåre. 1999. Community-based randomized controlled trial of reduced osmolarity oral rehydration solution in acute childhood diarrhea. Pediatr Infect Dis J. 18: 789-795.
  • Grewal, Harleen; Valvatne, Håvard; Bhan, M. K.; van Dijk, L; Gaastra, W.; Sommerfelt, Halvor. 1997. A new fimbrial putative colonization factor, CS19 in human enterotoxigenic <I>Escherichia coli</I>. Infection and Immunity. 65: 507-13.
  • Grewal, Harleen; Valvatne, Håvard; Bhan, M. K.; van Dijk, Linda; Gaastra, W.; Sommerfelt, Halvor. 1997. A new putative colonization factor, CS19, of human enterotoxigenic Escherichia coli. Infection and Immunity. 65: 507-513.
  • Halvorsen, T.; Valvatne, Håvard; Grewal, Harleen; Gaastra, W.; Sommerfelt, Halvor. 1997. Expression of colonization factor antigen I fimbriae by enterotoxigenic Escherichia coli; influence by growth conditions and a recombinant positive regulatory gene. Acta Pathologica, Microbiologica et Immunologica Scandinavica (APMIS). 105: 247-254.
  • Halvorsen, T.; Valvatne, Håvard; Grewal, Harleen; Gaastra, W.; Sommerfelt, Halvor. 1997. Expression of colonization factor antigen I by enterotoxigenic <I>Escherichia coli</I>; influence of growth conditions and a recombinant positive regulatory gene. Acta Pathologica, Microbiologica et Immunologica Scandinavica (APMIS). 105: 247-254.
  • Sommerfelt, Halvor; Steinsland, Hans; Grewal, H.M.S.; Viboud, G.; Bhandari, N.; Gaastra, W.; Svennerholm, A-M.; Bhan, M.K. 1996. Colonization factors of enterotoxigenic Echerichia coli isolated from children in North India. Journal of Infectious Diseases. 174: 768-776.
  • Sommerfelt, Halvor; Steinsland, Hans; Grewal, H.M.S.; Viboud, G.; Bhandari, N.; Gaastra, W.; Svennerholm, A-M.; Bhan, M.K. 1996. Colonization factors of enterotoxigenic Esherichia coli isolated from children in North India. Journal of Infectious Diseases. 174: 768-776.
  • Valvatne, Håvard; Sommerfelt, Halvor; Gaastra, W; Bahn, MK; Grewal, H.M.S. 1996. Identification and characterization of a new putative colonization fac tor of enterotoxigenic Escherichia coli. Infection and Immunity. 64: 2635-2642.
  • Grewal, Harleen; Hellander, A; Svennerholm, A-M.; Bhan, MK; Gaastra, W; Sommerfelt, Halvor. 1994. Genotypic and phenotypic identification of coli surface antigen 6-positive enterotoxigenic Escherichia coli. Journal of Clinical Microbiology. 32: 1295-1301.
  • Bhatnagar, S.; Bhan, M. K.; Sommerfelt, Halvor; Kumar, R.; Sazawal, S.; Saini, S. 1993. Enteroaggregative Escherichia coli, a possible new pathogen causing acute and persistent diarrhea. Scandinavian Journal of Infectious Diseases. 25: 579-583.
  • Grewal, Harleen; Gaastra, W.; Svennerholm, A-M.; Røli, J.; Sommerfelt, Halvor. 1993. Induction of Colonization Factor Antigen I and Coli Surface Antigen 4 of enterotoxigenic Escherichia coli. Vaccine. 11: 221-226.
  • Sommerfelt, Halvor; Bhan, M. K.; Srivastava, R.; Bhatnagar, S. 1993. Evaluation of DNA-DNA hybridization for the direct detection of enterotoxigenic Escherichia coli in stool blots. Scandinavian Journal of Infectious Diseases. 25: 457-463.
  • Sommerfelt, Halvor; Grewal, Harleen; Gaastra, W.; Svennerholm, A-M.; Bhan, M. K. 1992. Use of nonradioactive DNA Hybridization for the identification of enterotoxigenic Escherichia coli harboring genes for colonization factor antigen/1, coli surface antigen 4 and putative colonization factor 0166. Journal of Clinical Microbiology. 30: 1823-1828.
  • Sommerfelt, Halvor; Grewal, Harleen; Svennerholm, A-M.; Gaastra, W.; Bhan, M. K. 1992. Colonization factor antigen I, coli surface antigen 4 and putative colonization factor 0166 of enterotoxigenic Escherichia coli are genetically related. Vaccine. 10: 289-289.
  • Sommerfelt, Halvor; Grewal, Harleen; Svennerholm, A-M.; Gaastra, W.; Flood, P.; Viboud, G.; Bhan, M. K. 1992. Genetic relationship of putative colonization factor 0166 to colonization factor antigen I and coli surface antigen 4 of enterotoxigenic Escherichia coli. Infection and Immunity. 60: 3799-3806.
  • Sommerfelt, Halvor. 1991. Nucleic acid hybridization for the identification of enterotoxigenic Escherichia coli. Reviews in Medical Microbiology. 2: 138-146.
  • Sommerfelt, Halvor; Grewal, Harleen; Gaastra, W.; Bhan, M. K.; Svennerholm, A-M.; Kalland, Karl-Henning; Asphaug, V.; Aasland, Rein; Bjorvatn, B. 1991. Presence of cfaD-homologous sequences and expression of coli surface antigen 4 on enterotoxigenic Escherichia coli; relevance for diagnostic procedures. Microbial Pathogenesis. 11: 297-304.
  • Sommerfelt, Halvor; Haukanes, Bjørn Ivar; Kalland, Karl-Henning; Svennerholm, Ann-Mari; Sanchez, Joaquin; Bjorvatn, Bjarne. 1989. Mechanism of spontaneous loss of heat-stable toxin (STa) Production in enterotoxigenic Escherichia coli. Acta Pathologica, Microbiologica et Immunologica Scandinavica (APMIS). 97: 436-440.
  • Sommerfelt, Halvor; Svennerholm, Ann-Mari; Kalland, Karl-Henning; Haukanes, Bjørn Ivar; Bjorvatn, Bjarne. 1988. Comparative Study of Colony Hybridization With Synthetic Oligonucleotide Probes and Enzyme-Linked Immunosorbent Assay for Identification of Enterotoxigenic Escherichia Coli. Journal of Clinical Microbiology. 26: 530-534.
Reports and theses
  • Sommerfelt, Halvor. 1990. DNA-DNA hybridization for identification of enterotoxigenic Escherichia coli. Institute of International Health and Medical Departm ent B, Bergen. 1 pages.

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