Abstract
Summary
An extract of cysticerci of the common rabbit cestode, Tænia pisiformis, has been used as an antigen for skin testing in cases of echinococcal infection. An antigenic relationship between Tænia pisiformis and Tænia echinococcus is suggested by the precipitin-reaction, the alexin fixation, and the skin reaction in rabbits harboring Tænia pisiformis.
Four patients known to have hydatid disease gave immediate positive skin reactions with the rabbit antigen. Twenty normal subjects used as controls exhibited at most but slight reactions, and were considered negative.
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