LAUSR

BACKGROUND Congenital cytomegalovirus (CMV) infection (cCMV) is an important cause of hearing loss and cognitive impairment. Prior studies suggest that HIV-exposed children are at higher risk of acquiring cCMV. We assessed the presence, magnitude, and risk factors associated with cCMV among infants born to HIV-infected women, who were not receiving antiretrovirals during pregnancy. METHODS cCMV and urinary CMV load were determined in a cohort of infants born to HIV-infected women not receiving antiretrovirals during pregnancy. Neonatal urines obtained at birth were tested for CMV DNA by qualitative and reflex quantitative real-time PCR. RESULTS Urine specimens were available for 992 (58.9%) of 1684 infants; 64 (6.5%) were CMV-positive. Mean CMV load (VL) was 470,276 copies/ml (range: <200-2,000,000 copies/ml). Among 89 HIV-infected infants, 16 (18%) had cCMV versus 42 (4.9%) of 858 HIV-exposed, uninfected infants (p <0.0001). cCMV was present in 23.2% of infants with in utero and 9.1% infants with intrapartum HIV infection (p <0.0001). Rates of cCMV among HIV-infected infants were four-fold greater (aOR 4.4, 95% CI 2.3-8.2) and six-fold greater among HIV in utero-infected infants (aOR 6, 95% CI 3-12.1) compared with HIV-exposed, uninfected infants. cCMV was not associated with mode of delivery, gestational age, Apgar scores, six-month infant mortality, maternal age, race/ethnicity, HIV viral load, or CD4 count. Primary cCMV risk factors included infant HIV-infection, particularly in utero infection. CONCLUSION High rates of cCMV with high urinary CMV VL were observed in HIV-exposed infants. In utero HIV-infection appears to be a major risk factor for cCMV in infants whose mothers have not received combination antiretroviral therapy in pregnancy.