Casoni's Test : Notes (Echinococcus) - Dr Chaitanya Joshi, MD

Casoni’s Test : Notes for Doctors

~~Table of Contents(toc)~~

E granulosus lifecycle Souce and Copyright: CDC

Lets atart with a questin

Casoni’s test is done to diagnose …

a. Fascioliasis

c. Hookworm

b. Hydatid cyst

d. Schistoomiasis

Solution

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Ans: ‘b’
Casoni’s test (intradermal skin test) is an immediate hypersensitivity skin
test used in the diagnosis of hydatid cyst.

Echinococcus cyst cross section

Hydatid cyst

Pathogenesis infection is acquired by grass/vegetables contaminated with
dog feces containing larval cyst of E. granulosus.
Man is dead end host & accidental host
Dog is definitive host
Cyst may occur in liver (m/c site in adults); lung (m/c site in
children)

USG Finding in Hydatid Cyst

USG is diagnostic (multiloculated cyst)

PAIR procedure for Hydatid cyst:

Percutaneous puncture (P) of cyst under USG guidance, aspiration (A) of its
content, injection (I) of scolicidal agent & reaspiration (R). (for
small size < 5-6 cm).