Figure 3.

Race/ethnicity is associated with clustering and antibiotic susceptibility among heterosexuals. A, Race/ethnicity of heterosexuals and clustering are associated. Isolates were considered clustered if they were grouped with at least one other isolate in the dataset using the 10 nonrecombinant SNP cutoff. We identified a significant association between heterosexual race/ethnicity and whether an isolate was clustered (P = .04563). B, Unclustered isolates are associated with white heterosexuals. The χ ² residual for each category is displayed where blue represents more isolates than expected for the category and red represents fewer isolates than expected for the category. C, Isolates from white heterosexuals have higher MICs than isolates from black heterosexuals across antibiotics, including cefixime (P < .01). Significant pairwise comparisons are denoted by a bracket and asterisks (* P < .05, ** P < .01). Abbreviations: AZM, azithromycin; CIP, ciprofloxacin; CRO, ceftriaxone; MIC, minimum inhibitory concentrations.