Physiological state of Escherichia coli BJ4 growing in the large intestines of streptomycin-treated mice

作者：Lars Kongsbak Poulsen, Tine Rask Licht, Camilla Ulla Rang, Karen Angeliki Krogfelt, Søren Molin · 发表于：Journal of Bacteriology · 年份：1995 · DOI：10.1128/jb.177.20.5840-5845.1995 · 被引用次数：210 · 研究领域：Antibiotic Resistance in Bacteria、Gut microbiota and health、Mycobacterium research and diagnosis

Growth rates of Escherichia coli BJ4 colonizing the large intestine of streptomycin-treated mice were estimated by quantitative hybridization with rRNA target probes and by epifluorescence microscopy. The ribosomal contents in bacteria isolated from the cecal mucus, cecal contents, and feces were measured and correlated with the ribosomal contents of bacteria growing in vitro at defined rates. The data suggest that E. coli BJ4 grows at an overall high rate in the intestine. However, when taking into account the total intestinal volume and numbers of bacteria present in cecal mucus, cecal contents, and feces, we suggest that E. coli BJ4 in the intestine consists of two populations, one in the mucus which has an apparent generation time of 40 to 80 min and one in the luminal contents which is static.