We report the relative frequencies of members of the were the least frequently isolated spp. in the faeces of the 10 subjects. and ranked second and third in the faeces. The relative frequencies of all species except were lower in the lavage fluid and in cultures of mucosa. The relative frequency of increased from 4% in faeces to 39% in the final lavage fluid and to 42% in the colonic mucosa culture. Our results suggest that has a more intimate association with the gut mucosa than other members of the group, which might be one explanation for the high incidence of this species in gut-associated intra-abdominal infections.


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