Sam Newton

Summary

Publications

  1. ncbi request reprint Vitamin a supplementation does not affect infants' immune responses to polio and tetanus vaccines
    Sam Newton
    Kintampo Health Research Centre, Ghana
    J Nutr 135:2669-73. 2005
  2. ncbi request reprint Vitamin A supplementation enhances infants' immune responses to hepatitis B vaccine but does not affect responses to Haemophilus influenzae type b vaccine
    Sam Newton
    Kintampo Health Research Centre, Kintampo, Ghana
    J Nutr 137:1272-7. 2007
  3. doi request reprint Seroprotection associated with infant vitamin A supplementation given with vaccines is not related to antibody affinity to Hepatitis B and Haemophilus influenzae type b vaccines
    Sam Newton
    Kintampo Health Research Centre, Ghana
    Vaccine 28:4738-41. 2010
  4. doi request reprint Vitamin A supplements are well tolerated with the pentavalent vaccine
    Sam Newton
    Kintampo Health Research Centre, Ghana
    Vaccine 26:6608-13. 2008
  5. doi request reprint Drawing blood from young children: lessons learned from a trial in Ghana
    Sam Newton
    Kintampo Health Research Centre, P O Box 200, Kintampo, Ghana
    Trans R Soc Trop Med Hyg 103:497-9. 2009
  6. pmc Epidemiology of malaria in the forest-savanna transitional zone of Ghana
    Seth Owusu-Agyei
    Kintampo Health Research Centre, Kintampo, Ghana
    Malar J 8:220. 2009
  7. doi request reprint Prevalence of clinically captured and confirmed malaria among HIV seropositve clinic attendants in five hospitals in Ghana
    Dennis Adu-Gyasi
    Kintampo Health Research Centre, P, O, Box 200, Kintampo North, Ghana
    Malar J 12:382. 2013
  8. pmc An assessment of the likely acceptability of vaginal microbicides for HIV prevention among women in rural Ghana
    Martha A Abdulai
    Kintampo Health Research Centre, P O Box 200, Kintampo, Ghana
    BMC Womens Health 12:40. 2012
  9. ncbi request reprint Is there any monitoring of the quality of vitamin A capsules used in supplementation programs?
    Sam Newton
    Am J Clin Nutr 86:1254. 2007
  10. ncbi request reprint Need to worry: wrong vitamin A doses reported!
    Sam Newton
    Vaccine 25:4514. 2007

Collaborators

Detail Information

Publications11

  1. ncbi request reprint Vitamin a supplementation does not affect infants' immune responses to polio and tetanus vaccines
    Sam Newton
    Kintampo Health Research Centre, Ghana
    J Nutr 135:2669-73. 2005
    ..We found no evidence that vitamin A supplementation affects infants' antibody responses to tetanus toxoid or oral polio vaccine delivered at EPI contacts...
  2. ncbi request reprint Vitamin A supplementation enhances infants' immune responses to hepatitis B vaccine but does not affect responses to Haemophilus influenzae type b vaccine
    Sam Newton
    Kintampo Health Research Centre, Kintampo, Ghana
    J Nutr 137:1272-7. 2007
    ..9 vs. 90.2%, P = 0.04). However, given the high percentage of infants with seroprotection in the control group, it is doubtful that inclusion of vitamin A in the EPI would be justified on these grounds alone...
  3. doi request reprint Seroprotection associated with infant vitamin A supplementation given with vaccines is not related to antibody affinity to Hepatitis B and Haemophilus influenzae type b vaccines
    Sam Newton
    Kintampo Health Research Centre, Ghana
    Vaccine 28:4738-41. 2010
    ..The significant effect of vitamin A supplementation on the Hepatitis B vaccine component observed in a previous seroprotection analysis is probably due to the amount of antibodies since affinity was unaffected...
  4. doi request reprint Vitamin A supplements are well tolerated with the pentavalent vaccine
    Sam Newton
    Kintampo Health Research Centre, Ghana
    Vaccine 26:6608-13. 2008
    ..65 (0.55-39.5), p = 0.12. Due to the high point estimate of 4.65, we wish to urge caution in administering high doses of vitamin A to young infants with the pentavalent vaccine at 6, 10 and 14 weeks of age...
  5. doi request reprint Drawing blood from young children: lessons learned from a trial in Ghana
    Sam Newton
    Kintampo Health Research Centre, P O Box 200, Kintampo, Ghana
    Trans R Soc Trop Med Hyg 103:497-9. 2009
    ..Monitoring losses to follow-up as they emerged and allowing mothers to witness the blood draw, as well as holding community meetings, helped to allay anxieties in the community...
  6. pmc Epidemiology of malaria in the forest-savanna transitional zone of Ghana
    Seth Owusu-Agyei
    Kintampo Health Research Centre, Kintampo, Ghana
    Malar J 8:220. 2009
    ..As a background to the establishment of a site for anti-malarial drugs and vaccine trials, the epidemiology of malaria in a rural site in central Ghana was investigated...
  7. doi request reprint Prevalence of clinically captured and confirmed malaria among HIV seropositve clinic attendants in five hospitals in Ghana
    Dennis Adu-Gyasi
    Kintampo Health Research Centre, P, O, Box 200, Kintampo North, Ghana
    Malar J 12:382. 2013
    ..This study was carried out in five Ghanaian hospitals to estimate the prevalence of clinically confirmed malaria among HIV patients by evaluating their hospital records...
  8. pmc An assessment of the likely acceptability of vaginal microbicides for HIV prevention among women in rural Ghana
    Martha A Abdulai
    Kintampo Health Research Centre, P O Box 200, Kintampo, Ghana
    BMC Womens Health 12:40. 2012
    ..However it is in only a limited number of countries in sub-Saharan Africa that the acceptability of microbicides has been evaluated. We conducted a study to assess the acceptability of vaginal microbicides among women in rural Ghana...
  9. ncbi request reprint Is there any monitoring of the quality of vitamin A capsules used in supplementation programs?
    Sam Newton
    Am J Clin Nutr 86:1254. 2007
  10. ncbi request reprint Need to worry: wrong vitamin A doses reported!
    Sam Newton
    Vaccine 25:4514. 2007
  11. ncbi request reprint Stable isotope dilution techniques for assessing vitamin A status and bioefficacy of provitamin A carotenoids in humans
    Harold C Furr
    Craft Technologies, 4344 Frank Price Church Road, Wilson, NC 27893, USA
    Public Health Nutr 8:596-607. 2005
    ..This review summarises recent applications of stable isotope methodology to determine human vitamin A status, estimate human vitamin A requirements, and calculate the bioconversion and bioefficacy of food carotenoids...