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Published on: October 31, 2010
HIV risk exposure among South African children in public health facilities
O Shisana1, C Connolly, T M Rehle
1Human Science Research Council, Cape Town, South Africa. oshisana@hsrc.ac.za
Insights
HIV risk in South African children is primarily mother-to-child, but other transmission routes exist. Breastfeeding by non-biological mothers and dental procedures pose risks, highlighting the need for improved infection control and education.
Area of Science:
- Pediatric Infectious Diseases
- Epidemiology
- Public Health
Background:
- Mother-to-child transmission (MTCT) is a significant route of Human Immunodeficiency Virus (HIV) infection in children.
- Understanding non-vertical transmission routes is crucial for comprehensive HIV prevention strategies in pediatric populations.
- South Africa faces a substantial burden of pediatric HIV, necessitating detailed risk assessment.
Purpose of the Study:
- To investigate risk factors for HIV infection exposure in South African children aged 2-9 years.
- To identify modes of HIV transmission beyond mother-to-child transmission in the study population.
- To inform public health interventions for preventing pediatric HIV infections.
Main Methods:
- A cohort of 3471 children and their biological mothers were recruited from public health services in the Free State Province.
- Blood samples were collected for HIV testing, and exposure factors were assessed through nurse-administered questionnaires.
- DNA testing confirmed maternity in cases of HIV-discordant mother-child pairs. Statistical analyses included chi-square tests and multiple logistic regression.
Main Results:
- Maternal HIV status was a strong predictor of child HIV infection (OR: 310).
- Seven HIV-positive children had HIV-negative mothers, with transmission linked to non-biological mother breastfeeding (OR: 437), milk room expressed breast milk (OR: 37.6), dental injection history (OR: 31.5), and dental visits (OR: 26.9).
- These findings indicate potential risks of non-vertical HIV transmission in children.
Conclusions:
- While MTCT is the predominant HIV transmission route in South African children, other transmission pathways are evident.
- Non-vertical transmission risks, particularly associated with breastfeeding practices and dental procedures, require targeted prevention efforts.
- Enhanced education and improved infection-control measures are essential to mitigate non-vertical HIV transmission risks in children.
Abstract:
The study investigates the risk exposure to HIV infection among South African children aged 2-9 years served by public health services. Together with their biological mothers, 3471 children and were recruited from inpatient and outpatient children in the Free State Province. Blood samples were taken by professional nurses and a history taken of exposure factors associated with HIV transmission. DNA testing was used to confirm biological maternity where the child was HIV-positive and the mother HIV-negative. Mother-child pairs were stratified by mother's HIV status. Exposure factors related to the child's HIV status were examined in each stratum using a chi-square test. Independent factors were then included in a multiple logistic regression model. Having an HIV-positive mother was strongly related to HIV infection in children (OR: 310; 95%CI: 148-781). However, seven HIV-positive children had HIV-negative mothers. Transmission in this group was significantly associated with breastfeeding by a non-biological mother (OR: 437; 95%CI: 53-5020), being fed with expressed breast milk from a milk room (OR: 37.6; 95%CI: 6.2-259.0), dental injection history (OR: 31.5; 95%CI: 4.5-189.4) and visits to a dentist (OR: 26.9; 95%CI: 4.4-283.5). Although mother-to-child-transmission is shown to be the primary mode of HIV transmission in South African children, the few HIV-positive children infected by other modes of transmission suggest a potential risk of non-vertical HIV infections. These infections can be prevented through education and improved infection-control procedures.
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