Microbiology – MCQ 26 – A child with pustular lesion on his leg

A child had pustular lesion on leg. On gram staining gram positive cocci are seen. To establish the diagnosis of Group A streptococcal erythroderma, the test used is
a) Bile solubility test
b) Catalase test
c) Optochin sensitivity
d) Bacitracin sensitivity

Correct answer : d) Bacitracin sensitivity