Fig. 3From: Expanding dynamics of the virulence-related gene variations in the toxigenic Vibrio cholerae serogroup O1The distribution for the number of virulence-related genes in the different biotypes and epidemic periods of V. cholerae serogroup O1. (a) The distribution of the number of virulence-related genes in classical and El Tor biotypes. C indicates the classical biotype, E indicated the El Tor biotype. (b) The distribution of the number of virulence-related genes in three epidemic periodsBack to article page