Non-O157 Shiga-toxin-producing Escherichia coli.

摘要

The recent outbreak of a non-0157 Shiga-toxin-producing Escherichia coli (STEC) did not surprise me. In 2007, I noted the widespread nature of non-0157 STEC: most ruminants carry them in their intestinal flora, and improved methods of isolation suggest that the serotype could be present in almost all ruminants; whereas 0157 STEC are the minority, if found at all.0157 isolates are rare when all STEC are sought rather than a single serotype (by use of a 0157-specific medium). The absurdity of the use of special media that detect the 0157 clone only was shown in 1996 during an investigation of an outbreak of mainly STEC 0111, but also other serotypes, such as O157 The degree of clinical severity of the patients' condition was proportional to the number of different STEC serotypes to which they were exposed, rather than a particular STEC serotype.