HIV Mother-to-Child Transmission in Cameroon: EID Positivity Yields and Key Risk Factors by Health Service Points After Usage of POC EID Systems

Background Most HIV-exposed infants access early infant diagnosis (EID) through the prevention of mother-to-child transmission (PMTCT) service points. However, there are limited data on HIV positivity in non-PMTCT health care settings (pediatric wards, emergency departments, outpatient departments, tuberculosis clinics, etc.). The introduction of point-of-care testing provided an opportunity to describe HIV positivity at alternative health service points and associated risk factors. Methods We performed a cross-sectional subanalysis with data from 58 health facilities in Cameroon. The risk of a child being HIV positive at a health service point was considered as a dependent variable, and exploratory variables were assessed using multivariate models with a significance level of 0.05. Results Overall, 2254 HIV-exposed infants identified by clinical or biological screening were tested by polymerase chain reaction using point-of-care EID. Approximately 74.3% of the infants were tested at a PMTCT entry point, whereas 25.7% were tested at non-PMTCT service points. The positivity yield was 5.7% (95 of the 1674) at the PMTCT service point and 17.6% (102 of the 580) at non-PMTCT service points. Non-PMTCT service points [adjusted odds ratio (aOR): 1.95; 95% confidence interval (CI): 1.36 to 2.80] and vaginal delivery (aOR: 2.56; 95% CI: 1.25 to 5.25) were independently associated with HIV positivity. In a separate analysis (infants aged 0-6 months), mixed feeding mode (aOR: 3.68; 95% CI: 2.00 to 6.77) was also associated with HIV positivity. Conclusions More than half of children newly identified as HIV-positive were tested at non-PMTCT service points. The highest EID positivity yields were found in non-PMTCT service points. Strengthening HIV testing in non-PMTCT service points may help to identify additional infected children and improve timely initiation of treatment and care.