What test is used as a presumptive identification of Streptococcus pneumoniae?
A)Optochin
B)Bacitracin
C)PYR
D)Hippurate hydrolysis

Question

Quizplus · Accepted Answer

In the optochin test, a filter paper disk containing optochin is added to the surface of an SBA plate that has just been inoculated with an a-hemolytic streptococcus.The plate is incubated overnight at 35° C in a carbon dioxide incubator.A zone of inhibition greater than 14 mm with a 6-mm disk and a zone of inhibition greater than 16 mm with a 10-mm disk are considered susceptible and are a presumptive identification of S.pneumoniae.

What Test Is Used as a Presumptive Identification of Streptococcus