Enrichment of gram-negative anaerobic bacteria and phages in an in vitro faecal fermentation model

A faecal fermentation was initiated using faeces from an individual previously identified as a persistent carrier of multiple crAss-like phages. The fermentation was performed under anaerobic conditions with vancomycin and kanamycin added in an attempt to suppress the growth of Gram-positive and facultative anaerobic bacteria and favour the strictly anaerobic Gram-negative Bacteroidales, as well as crAss-like phages infecting these bacteria