FIG 1.

Phenotypic and biochemical features of Erysipelothrix rhusiopathiae. (A) Gram stain of positive blood culture broth demonstrating Gram-positive bacilli. (B) Inset of image (A) highlighting Gram-positive bacilli appearing at times Gram negative (arrows). (C) Small, alpha-hemolytic colonies of E. rhusiopathiae growing on 5% sheep blood agar after 3 days of incubation. (D) Growth of E. rhusiopathiae isolate abuts 30-µg vancomycin disk demonstrating vancomycin resistance. (E) Hydrogen sulfide production is noted by formation of black precipitate when a triple sugar iron (TSI) Agar slant is inoculated with E. rhusiopathiae.