Halvor
Sommerfelt
Professor
Visit Address:
Kalfarveien 31
5018 Bergen
Postal Address:
Postboks 7804
5018 Bergen
Phone:
+47 55 58 85 75
+47 406 40 882
E-mail:
Journal articles
- 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
- 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). doi: 10.1136/bmj.g4988
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 2012. Zinc for probable serious bacterial infection in infants reply. The Lancet. 380: 1144-1144.
- 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
- 2012. Statistical methods in the Global Enteric Multicenter Study (GEMS). Clinical Infectious Diseases. 55: S246-S253. doi: 10.1093/cid/cis788
- 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
- 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
- 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
- 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
- 2012. Risk factors for extended duration of acute diarrhea in young children. PLoS ONE. 7. doi: 10.1371/journal.pone.0036436
- 2012. High perinatal mortality in Burkina Faso and Uganda. Acta Obstetricia et Gynecologica Scandinavica. 91: 138-138.
- 2011. Stability of secretory IgA in saliva. Scandinavian Journal of Immunology. 73: 381-382. doi: 10.1111/j.1365-3083.2011.02516.x
- 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
- 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
- 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
- 2011. Internasjonal satsing for bedre helse - Norges rolle. Tidsskrift for Den norske legeforening. 131: 1796-1798.
- 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
- 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
- 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
- 2011. RNA viruses in young Nepalese children hospitalized with severe pneumonia. The Pediatric Infectious Disease Journal. 30: 1032-1036. doi: 10.1097/INF.0b013e31822f845f
- 2011. Perinatal mortality in Eastern Uganda: A community based prospective cohort study. PLoS ONE. 6. 7 pages. doi: 10.1371/journal.pone.0019674
- 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
- 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.
- 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
- 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
- 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
- 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
- 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
- 2010. Molecular mechanisms of enterotoxigenic Escherichia coli infection. Microbes and infection. 12: 89-98. doi: 10.1016/j.micinf.2009.10.002
- 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
- 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
- 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
- 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
- 2010. Ancestral Lineages of Human Enterotoxigenic Escherichia coli. Journal of Clinical Microbiology. 48: 2916-2924. doi: 10.1128/JCM.02432-09
- 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
- 2010. Heat-stable enterotoxin of enterotoxigenic escherichia coli as a vaccine target. Infection and Immunity. 78: 1824-1831. doi: 10.1128/IAI.01397-09
- 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
- 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
- 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.
- 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
- 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.
- 2009. Bistand for bedre helse - Norges rolle. Tidsskrift for Den norske legeforening. 129: 2471. doi: 10.4045/tidsskr.09.1158
- 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.
- 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
- 2009. FOLATE AND VITAMIN B12 STATUS IN YOUNG NEPALESE CHILDREN. Annals of Nutrition and Metabolism. 55: 488-489.
- 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.
- 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.
- 2008. Multi-country analysis of the effects of diarrhoea on childhood stunting. International Journal of Epidemiology. 37: 816-830. doi: 10.1093/ije/dyn099
- 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
- 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
- 2007. Folate, but not vitamin B-12 status, predicts respiratory morbidity in north Indian children. American Journal of Clinical Nutrition. 86: 139-144.
- 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.
- 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
- 2005. Intervention studies for improving global health and health care: an important arena for epidemiologists. Norsk Epidemiologi. 15: 123-126.
- 2004. Cost-effectiveness of zinc as adjunct therapy for acute childhood diarrhoea in developing countries. Bulletin of the World Health Organization. 87: 523-531.
- 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.
- 2004. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. Ugeskrift for læger. 166: 4051-4053.
- 2004. Predictors of plasma zinc concentrations in children with acute diarrhea. American Journal of Clinical Nutrition. 79: 451-456. Published 2004-04-01.
- 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
- 2003. Vitamin A supplementation and childhood mortality: amplification of the non-specific effects of vaccines? International Journal of Epidemiology. 32: 822-828.
- 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.
- 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.
- 2003. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 362: 286-291.
- 2003. Protection from natural infections with enterotoxigenic Escherichia coli: longitudinal study. The Lancet. 362: 286-291.
- 2003. Development and evaluation of genotypic assays for the detection and characterization of enterotoxigenic Escherichia coli. Diagnostic microbiology and infectious disease. 45: 97-105.
- 2003. The immune response to pneumococcal polysaccharide vaccine in zinc depleted mice. Scandinavian Journal of Immunology. 58: 76-80.
- 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.
- 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.
- 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.
- 2002. Efficacy of Zinc-fortified oral rehydration solution in 6- to 35-month-old children with acute diarrhea. Journal of Pediatrics. 141: 677-682.
- 2002. Substantial Reduction in Severe Diarrheal Morbidity by Daily Zinc Supplementation in Young North Indian Children. Pediatrics. 109: 86.
- 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.
- 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.
- 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.
- 2002. Enterotoxigenic Escherichia coli infections and diarrhea in a cohort of young children in Guinea-Bissau. Journal of Infectious Diseases. 186. 1740-1747.
- 2002. Effectiveness and efficacy of zinc for the treatment of acute diarrhea in young children. Pediatrics. 109: 898-903.
- 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.
- 2001. Micronutrient deficiency in children. Commentary. British Journal of Nutrition. 85: 199-203.
- 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.
- 2001. Pneumococcal pulmonary infection, septicemia and survival in young zinc-depleted mice. British Journal of Nutrition. 86: 301-306.
- 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.
- 2000. Genotype Profiles of Rotavirus Strains from Children in a Suburban Community in Guinea-Bissau, Western Africa. Journal of Clinical Microbiology. 38: 264-267.
- 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.
- 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.
- 1999. Community-based randomized controlled trial of reduced osmolarity oral rehydration solution in acute childhood diarrhea. Pediatr Infect Dis J. 18: 789-795.
- 1997. A new fimbrial putative colonization factor, CS19 in human enterotoxigenic <I>Escherichia coli</I>. Infection and Immunity. 65: 507-13.
- 1997. A new putative colonization factor, CS19, of human enterotoxigenic Escherichia coli. Infection and Immunity. 65: 507-513.
- 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.
- 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.
- 1996. Colonization factors of enterotoxigenic Echerichia coli isolated from children in North India. Journal of Infectious Diseases. 174: 768-776.
- 1996. Colonization factors of enterotoxigenic Esherichia coli isolated from children in North India. Journal of Infectious Diseases. 174: 768-776.
- 1996. Identification and characterization of a new putative colonization fac tor of enterotoxigenic Escherichia coli. Infection and Immunity. 64: 2635-2642.
- 1994. Genotypic and phenotypic identification of coli surface antigen 6-positive enterotoxigenic Escherichia coli. Journal of Clinical Microbiology. 32: 1295-1301.
- 1993. Enteroaggregative Escherichia coli, a possible new pathogen causing acute and persistent diarrhea. Scandinavian Journal of Infectious Diseases. 25: 579-583.
- 1993. Induction of Colonization Factor Antigen I and Coli Surface Antigen 4 of enterotoxigenic Escherichia coli. Vaccine. 11: 221-226.
- 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.
- 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.
- 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.
- 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.
- 1991. Nucleic acid hybridization for the identification of enterotoxigenic Escherichia coli. Reviews in Medical Microbiology. 2: 138-146.
- 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.
- 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.
- 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
- 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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