Pascopella L, Raupach B, Ghori N, Monack D, Falkow S, Small P L
Rocky Mountain Laboratories, Hamilton, Montana 59840, USA.
Infect Immun. 1995 Nov;63(11):4329-35. doi: 10.1128/iai.63.11.4329-4335.1995.
Salmonella typhi and Salmonella gallinarum phenotypes correlated with mouse host restriction have been identified by using in vitro and in vivo systems. S. typhi is capable of entering the murine intestinal epithelium via M cells, as is Salmonella typhimurium, which causes systemic infection in the mouse. But, unlike S. typhimurium, S. typhi does not destroy the epithelium and is cleared from the Peyer's patches soon after M-cell entry. S. gallinarum appears to be incapable of entering the murine Peyer's patch epithelium. Our in vitro evidence suggests that S. gallinarum is taken up in murine phagocytic cells by a mechanism different from that of S. typhimurium. S. typhimurium is taken up at a higher frequency and is maintained at higher viable counts throughout a 24-h time course in a murine macrophage-like cell line than are S. gallinarum and S. typhi.
通过使用体外和体内系统,已鉴定出与小鼠宿主限制相关的伤寒沙门氏菌和鸡沙门氏菌的表型。伤寒沙门氏菌能够通过M细胞进入小鼠肠道上皮,鼠伤寒沙门氏菌也能如此,后者可在小鼠体内引起全身感染。但是,与鼠伤寒沙门氏菌不同,伤寒沙门氏菌不会破坏上皮细胞,并且在进入M细胞后不久便会从派尔集合淋巴结中清除。鸡沙门氏菌似乎无法进入小鼠派尔集合淋巴结上皮。我们的体外证据表明,鸡沙门氏菌被小鼠吞噬细胞摄取的机制与鼠伤寒沙门氏菌不同。在鼠类巨噬细胞样细胞系中,鼠伤寒沙门氏菌的摄取频率更高,并且在整个24小时的时间进程中,其存活菌数都比鸡沙门氏菌和伤寒沙门氏菌维持得更高。