Plasmodium Brasilianum Antigen for use in the Indirect Hemagglutination Test

Henry M. MathewsCenter for Disease Control, Public Health Service, U. S. Department of Health, Education, and Welfare, Atlanta, Georgia 30333

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Deborah A. DilworthCenter for Disease Control, Public Health Service, U. S. Department of Health, Education, and Welfare, Atlanta, Georgia 30333

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Antigen was prepared from Plasmodium brasilianum harvested from an infected spider monkey. This antigen was attached to aldehyde-fixed, human type O cells, and was tested against sera from human cases of P. malaria, P. vivax, P. falciparum, and P. ovale infection, and sera from noninfected persons. At dilutions of 1:16 or greater the antigen failed to react in sera from noninfected persons. It reacted at titers of 16 or above with sera from 85% of the persons with P. malariae infection, 83% with P. vivax infection, 70% with P. falciparum infection, and 70% with P. ovale infection.

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