What organism on SBA has grayish white colonies surrounded by a small zone of $\beta$-hemolysis?
A) Viridans strep
B) Enterococcus
C) Streptococcus pyogenes
D) Streptococcus agalactiae

Question

Quizplus · Accepted Answer

Streptococcus agalactiae (Group B Streptococcus) typically forms grayish white colonies with a narrow zone of beta-hemolysis on sheep blood agar (SBA).

What Organism on SBA Has Grayish White Colonies Surrounded by a Small