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• W3125568035 endingPage "1584" @default.
• W3125568035 startingPage "1569" @default.
• W3125568035 abstract "Temperate phages are viruses of bacteria that can establish two types of infection: a lysogenic infection in which the virus replicates with the host cell without producing virions, and a lytic infection where the host cell is eventually destroyed, and new virions are released. While both lytic and lysogenic infections are routinely observed in the environment, the ecological and evolutionary processes regulating these viral dynamics are still not well understood, especially for uncultivated virus-host pairs. Here, we characterized the long-term dynamics of uncultivated viruses infecting green sulfur bacteria (GSB) in a model freshwater lake (Trout Bog Lake, TBL). As no GSB virus has been formally described yet, we first used two complementary approaches to identify new GSB viruses from TBL; one in vitro based on flow cytometry cell sorting, the other in silico based on CRISPR spacer sequences. We then took advantage of existing TBL metagenomes covering the 2005-2018 period to examine the interactions between GSB and their viruses across years and seasons. From our data, GSB populations in TBL were constantly associated with at least 2-8 viruses each, including both lytic and temperate phages. The dominant GSB population in particular was consistently associated with two prophages with a nearly 100% infection rate for >10 years. We illustrate with a theoretical model that such an interaction can be stable given a low, but persistent, level of prophage induction in low-diversity host populations. Overall, our data suggest that lytic and lysogenic viruses can readily co-infect the same host population, and that host strain-level diversity might be an important factor controlling virus-host dynamics including lytic/lysogeny switch." @default.
• W3125568035 created "2021-02-01" @default.
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• W3125568035 date "2021-01-15" @default.
• W3125568035 modified "2023-10-01" @default.
• W3125568035 title "Host population diversity as a driver of viral infection cycle in wild populations of green sulfur bacteria with long standing virus-host interactions" @default.
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• W3125568035 doi "https://doi.org/10.1038/s41396-020-00870-1" @default.
• W3125568035 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8163819" @default.

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