Seroprevalence of measles and natural rubella antibodies among children in Bangui, Central African Republic

BMC Public Health

Research Article

Alexandre Manirakiza¹  Ionela Gouandjika-Vasilache¹  Régis M'Bary Daba²  Jean Marie Kipela³  Stephen Sosler⁴ 

[1] Institut Pasteur de Bangui, Réseau International des Instituts Pasteur, BP 923, Bangui, Central African Republic;World Health Organization, Bangui, Central African Republic;World Health Organization, Libreville, Gabon;World Health Organization, New Delhi, India;

关键词: Measle;    Rubella;    Measle Virus;    Vaccination Status;    Maternal Antibody;   

DOI  :  10.1186/1471-2458-11-327

 received in 2010-11-05, accepted in 2011-05-17,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundPassively acquired maternal antibodies are necessary to protect infants against circulating measles virus until they reach the eligible age of vaccination. Likewise, high levels of population immunity must be achieved and maintained to reduce measles virus transmission. This study was undertaken to (1) assess the presence of maternally acquired measles-specific IgG antibodies among infants less than 9 months of age in Bangui, Central African Republic and (2) determine the immune status of vaccination-age children and the concordance with reported vaccination status. A secondary objective was to describe the presence of rubella-specific IgG antibody in the study population.MethodsVaccination history and blood samples were collected from 395 children using blotting paper. Samples were analyzed for the presence of measles-specific IgG antibodies using commercial ELISA kits.ResultsMeasles-specific IgG antibodies were detected in 51.3% of vaccinated children and 27.6% of non-vaccinated children. Maternally derived measles IgG antibodies were present in only 14.8% of infants aged 0-3 months and were absent in all infants aged 4-8 months. The presence of IgG-specific measles antibodies varied among children of vaccination age, from 57.3% for children aged 9 months to 5 years, to 50.6% for children aged 6-9 years and 45.6% for chidren aged 10 years and above. The overall prevalence of rubella-specific IgG was 55.4%, with a high prevalence (87.4%) among children over 10 years of age.ConclusionThe findings suggest that despite efforts to accelerate measles control by giving a second dose of measles vaccine, a large number of children remain susceptible to measles virus. Further research is required to determine the geographic extent of immunity gaps and the factors that influence immunity to measles virus in the Central African Republic.

【 授权许可】

Unknown   
© Manirakiza et al; licensee BioMed Central Ltd. 2011. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.