Full 2L QBank
Microbiology General a9a50629

Which of the following infection gives a positive Casoni test?

A
Diphtheria
B
Scarlet fever
C
Echinococcus
D
Kala Azar
High-Yield Explanation
Casoni's test is based on the principle of immediate hypersensitivity. The antigen used is hydatid fluid collected from animal or human cysts and is sterilised by Seitz or membrane filtration. 0.2 ml of the antigen injected intradermally. In positive cases a large wheal about 5 cm in diameter, with multiple pseudopodia like projections appears in 25-30 minutes. This is a sensitive test but not specific. Ref: Medical Parasitology By Bhatia, 3rd edition, Page 221.

Related Microbiology MCQs

Practice 2,00,000+ NEET PG Questions Free

Timed mock tests, mistake queue analytics, audio lectures & zero attempt limits on i❤️Exams.

Start Free Mock Test Now