Church, Jessica D.Huang, WeiMwatha, AnthonyMusoke, PhilippaJackson, J. BrooksBagenda, DanstanOmer, Saad B.Donnell, DeborahNakabiito, ClemensiaEure, ChinetaGuay, Laura A.Taylor, AllanBakaki, Paul M.Matovu, FlaviaMcConnell, MichelleFowler, Mary GlennEshleman, Susan H.2021-12-152021-12-152010D Church, Jessica, Wei Huang, Anthony Mwatha, Philippa Musoke, J. Brooks Jackson, Danstan Bagenda, Saad B Omer et al. "Analysis of HIV tropism in Ugandan infants." Current HIV research 8, no. 7 (2010): 498-503. https://doi.org/10.2174/157016210793499187https://doi.org/10.2174/157016210793499187https://nru.uncst.go.ug/xmlui/handle/123456789/556HIV-infected infants may have CXCR4-using (X4-tropic) HIV, CCR5-using (R5-tropic) HIV, or a mixture of R5-tropic and X4-tropic HIV (dual/mixed, DM HIV). The level of infectivity for R5 virus (R5-RLU) varies among HIV-infected infants. HIV tropism and R5-RLU were measured in samples from HIV-infected Ugandan infants using a commercial assay. DM HIV was detected in 7/72 (9.7%) infants at the time of HIV diagnosis (birth or 6–8 weeks of age, 4/15 (26.7%) with subtype D, 3/57 (5.3 %) with other subtypes, P=0.013). A transition from R5-tropic to DM HIV was observed in only two (6.7%) of 30 infants over 6–12 months. Six (85.7%) of seven infants with DM HIV died, compared to 21/67 (31.3%) infants with R5-tropic HIV (p=0.09). Higher R5- RLU at 6–8 weeks was not associated with decreased survival. Infants with in utero infection had a higher median R5-RLU than infants who were HIV-uninfected at birth (p=0.025).enCCR5CXCR4HIV-1InfantSurvivalTransmissionTropismArticle