Abstract
Summary
Antigens prepared from E. invadens and E. histolytica, DKB strain grown in monomicrobial culture with T. cruzi in Phillips' medium have demonstrated high sensitivity and been used successfully in reciprocal hemagglutination tests with specific antisera prepared in rabbits. The antigen prepared from E. histolytica has also been used in both the hemagglutination test and the complement fixation test employing sera from individuals with and without amebiasis. In the hemagglutination test 98% of the former were positive while only 2% of the latter sera were positive. Sera from “carriers” most of whom lived in the tropics, gave 68% positive correlation.
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