Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) Appearance of two colonial morphotypes on blood agar. Predominantly large, beta-hemolytic colonies (at right) and predominantly small nonhemolytic colonies (at left) are shown. (B) Appearance of colonial morphotypes on Congo red agar. Large dark red colonies (at right) and small transparent colonies (at left) are shown.
