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The cell type that hosts parvovirus B19 (B19V) DNA lifelong is currently unknown. Here, the authors identify tonsillar B cells as a reservoir, detect an extinct B19V type in older adults, supporting a long-term association, and show that B19V uptake into B cells is antibody dependent.
CD32a expression is induced on the surface of HIV-1-infected quiescent CD4 T cells, and could thus be used as a biomarker to facilitate future study of how the virus persists in cellular reservoirs in infected hosts.
Bats are natural hosts for Marburg virus (MARV), but the mechanism of bat-to-bat transmission is unclear. Here, Schuh et al. monitor MARV infection in a cohort of 38 bats over nine months, find ‘supershedders’ and show that MARV can horizontally transmit between bats.
A recent study using a humanized mouse model shows that HIV-1 can persist in macrophages during antiretroviral therapy (ART), and suggests that macrophages may represent an obstacle to efforts to cure HIV-1 infection.
Deep-sequencing of lymphoid tissue samples from patients infected with HIV who were undergoing suppressive antiretroviral therapy reveals ongoing replication in lymphoid tissues and replenishment of the latent reservoir.