Which of the following agent of meningitis can grow on chocolate agar but not on blood agar?
Correct Answer: Haemophilus influenzae
Description: H influenzae growns in the presence of factor X and V avaliable in blood. Factor V is intracellular hence not available easily. Also sheep blood contain NAdase thatdestroys factor V. In chocolate agar, blood is poured in molten agar which inactivates NADase and lyses RBCs releasing factor V.
Category:
Anatomy
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now