Abstract
Simian foamy viruses (SFVs) are thought to infect virtually any adult nonhuman primate (NHP). While many data have accumulated about patterns of codivergence with their hosts and cross-species transmission events, little is known about the modalities of SFV transmission within NHP species, especially in the wild. Here we provide a detailed investigation of the dynamics of SFV circulation in a wild community of Western chimpanzees (Pan troglodytes verus). We demonstrate that mother-offspring (vertical) SFV transmission is common and hypothesize that it accounts for a number of primary infections. We also show that multiple infections with several chimpanzee-specific SFV strains (i.e., superinfection) commonly happen in adult chimpanzees, which might point to adult-specific aggressive behaviors as a lifelong source of SFV infection. Our data give evidence for complex SFV dynamics in wild chimpanzees, even at a single community scale, and show that linking wild NHP social interactions and their microorganisms' dynamics is feasible.
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