FIG 7.

The intestinal anaerobic microbiota of DSS-fed mice displays a bacterial load and composition altered from those of the intestinal anaerobic microbiota of conventionally fed mice. DSS promotes a pronounced shift in the anaerobic Gram-negative microbial composition of mouse feces and intestinal contents. The intestinal and colon anaerobic bacterial loads and compositions of control SPF mice and DSS-fed mice (day 7) were determined. (A) Intestines from DSS-treated mice mouse obtained on day 7 of treatment exhibit an increased anaerobic bacterial load compared to that of control SPF mouse intestines. (B) Colons from DSS-treated mice obtained on day 7 of treatment exhibit a decreased anaerobic bacterial load compared to that of control SPF mouse colons. (C) Gram-negative Enterobacteriaceae are more prevalent in intestines from DSS-treated mice mouse obtained on day 7 of treatment than control SPF mouse intestines. (D) Gram-negative Enterobacteriaceae are more prevalent in colons from DSS-treated mice obtained on day 7 of treatment than control SPF mouse intestines.