Casoni test

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Casoni test

The Casoni test (pronounced: kah-SOH-nee test) is a skin test used to diagnose hydatid disease, a parasitic infection caused by the Echinococcus tapeworm.

Etymology

The test is named after Italian physician Aldo Casoni, who first described it in the early 20th century.

Procedure

The Casoni test involves injecting a small amount of hydatid fluid (extracted from an infected animal) into the skin of the patient. If the patient is infected with the Echinococcus tapeworm, a localized allergic reaction will occur within 15 to 30 minutes, indicating a positive result.

Reliability

The Casoni test has been largely replaced by more accurate diagnostic methods, such as serological tests and imaging techniques, due to its low sensitivity and specificity. False positives can occur in patients with other parasitic infections, and false negatives can occur in early or light infections.

Related Terms

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