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What is Sabin-Feldman dye test is used for diagnosis of: March 2005, 2009 and September 2007 and explain in detail?
Ans. D: Toxoplasma The most common method of laboratory diagnosis of toxoplasma gondii is by serology like Sabin-Feldman dye test, indirect immunofluorescence, indirect haemagglutination, complement fixation and ELISA. Sabin-Feldman dye test is based on the specific inhibition by antibody of the staining of the trophozoite by alkaline methylene blue.