HardyCHROM SS NoPRO contains a proprietary antimicrobial that the firm claims eliminates the growth of Proteus spp. Hektoen Enteric (HE) Agar was introduced almost 50 years ago to select for most ...

Shigella colonies on a chromagar plate culture medium are teal, while E. coli colonies are pink. This photograph from the Harborview Medical Center Microbiology Lab in Seattle was taken Jan. 30, 2023.