"Observation of a wheal at the site of injection of the hydatid cyst origin fluid at 30 minutes post-injection is regarded as a positive test 1. Observation of a delayed reaction is also possible."
Expected headings
"Findings"
"The Casoni skin test is a hypersensitivity based skin test used to detect hydatid disease. Although once a major test in diagnosing hydatid disease it has largely been superseded by newer more sensitive, specific and safer serological tests."