passive hemagglutination

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Related to indirect hemagglutination test: IHA test

pas·sive he·mag·glu·ti·na·tion

a kind of passive agglutination in which erythrocytes, usually modified by mild treatment with tannic acid or other chemicals, are used to adsorb soluble antigen onto their surface, and which then agglutinate in the presence of antiserum specific for the adsorbed antigen.
Farlex Partner Medical Dictionary © Farlex 2012

pas·sive he·mag·glu·ti·na·tion

(pas'iv hē'mă-glū-ti-nā'shŭn)
Agglutination in which erythrocytes, usually modified by treatment with chemicals, adsorb soluble antigen and then agglutinate in the presence of antiserum specific for the adsorbed antigen.
Synonym(s): indirect hemagglutination test.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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Although indirect hemagglutination test has a higher false negative and false positive results due to cross reactivity with other parasitic infections.
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Serologic testing was performed by using an indirect hemagglutination test at PathCentre (Nedlands, Australia), with a positive result defined as a titer [greater than or equal to]40 (1).
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Of the serologic tests, the indirect hemagglutination test and the Casoni skin test have approximately an 85% sensitivity.

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