Figure 5.

Four-way Venn diagram of Campylobacter jejuni comparative genomic fingerprinting (CGF) subtypes recovered from beef cattle throughout the production continuum (95% level of resolution). (A) Subtypes susceptible to tetracycline isolated from animals administered chlortetracycline and sulfamethazine (i.e., AS700 treatment). (B) Subtypes resistant to tetracycline isolated from AS700 treatment animals. (C) Subtypes susceptible to tetracycline isolated from animals not administered antibiotics (i.e., control treatment). (D) Subtypes resistant to tetracycline isolated from control treatment animals. Notably, the majority of subtypes contained C. jejuni isolates that were exclusively resistant or exclusively susceptible to tetracycline; subtypes that contained isolates that were both resistant and susceptible to tetracycline were less common. The total number of C. jejuni isolates examined and CGF subtypes obtained (95% level of resolution) are 664 and 126, respectively.