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MICROBIOLOGY GPC TESTING Questions & Detailed Answers 2024
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MICROBIOLOGY GPC TESTING Questions & Detailed Answers 2024
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MICROBIOLOGY GPC TESTINGBacitracin Susceptibility - correct answer Bacitracin or "A" disk Identifies Group
A streptococci
PYR disk - correct answer Better test because reaction is more definitive
Christie-Atkins, Munch-Petersen (CAMP) test - correct answer Occurs when b-
lysin and the hemolysins of group B streptococci come in contact=classical
"arrow-shaped hemolysis
Hippurate Hydrolysis Test - correct answer Differentiates group B streptococci
from other beta hemolytic streptococci, Group B streptococci hydrolyzes sodium
hippurate
Add Ninhydrin to get purple complex
PYR Hydrolysis - correct answer Hydrolyzed by group A streptococci &
Enterococcus sp.
Leucine Aminopeptidase (LAP) - correct answer Add PEP reagent=Hydrolysis of
leucine beta-naphthylamide=>Useful in differentiating Aerococcus &
Leuconostoc
Voges-Proskauer (VP) Test - correct answer Detects acetoin,6 hours incubation;
Add drops of 5% alpha-naphthol a& 40% potassium hydroxide=Red or pink is
positive (Anginosus group is positive)
Beta-D-Glucuronidase - correct answer Enzyme found in group C and group G
streptococci
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