Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Prevalence of O serogroups in 360 strains of all Escherichia coli isolates examined (A) and in 306 or 54 strains in which typical virulence factor genes of diarrheagenic E. coli were detected (B) or not detected (C), respectively. The proportions of each O serogroup are indicated in different colors.
