Emergence of a Novel Shigella flexneri Serotype 4s Strain That Evolved from a Serotype X Variant in China

摘要

This paper describes the first isolation of a new Shigella flexneri serotype, designated 4s, in Beijing, China. Genotypic and phenotypic profiling suggests that this isolate is a clone of the S. flexneri serotype X variant reference strain. Of particular concern is the multidrug resistance exhibited by this isolate.