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Virulent coliphages in 1-year-old children fecal samples are fewer, but more infectious than temperate coliphages.

07:00 EST 17th January 2020 | BioPortfolio

Summary of "Virulent coliphages in 1-year-old children fecal samples are fewer, but more infectious than temperate coliphages."

Bacteriophages constitute an important part of the human gut microbiota, but their impact on this community is largely unknown. Here, we cultivate temperate phages produced by 900 E. coli strains isolated from 648 fecal samples from 1-year-old children and obtain coliphages directly from the viral fraction of the same fecal samples. We find that 63% of strains hosted phages, while 24% of the viromes contain phages targeting E. coli. 150 of these phages, half recovered from strain supernatants, half from virome (73% temperate and 27% virulent) were tested for their host range on 75 E. coli strains isolated from the same cohort. Temperate phages barely infected the gut strains, whereas virulent phages killed up to 68% of them. We conclude that in fecal samples from children, temperate coliphages dominate, while virulent ones have greater infectivity and broader host range, likely playing a role in gut microbiota dynamics.

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This article was published in the following journal.

Name: Nature communications
ISSN: 2041-1723
Pages: 378

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Medical and Biotech [MESH] Definitions

The type species of the genus MICROVIRUS. A prototype of the small virulent DNA coliphages, it is composed of a single strand of supercoiled circular DNA, which on infection, is converted to a double-stranded replicative form by a host enzyme.

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