Washington University

Iti Saraav

Laurence David Sibley

Qiuling Wang

Kevin M Brown

Mary Savari Dhason

Antigens ofthat provide specific and strong delayed type hypersensitivity (DTH) immune response, or which stimulate IFN-γ secretion, are used for testing subjects for infection. Any skin testing format may be adapted for testing for the delayed type hypersensitivity, including a patch, a needle, or a prong. Presence of DTH indicates infection. Alternate methods of detecting a T cell response including monitoring IFN-γ secretion may be used.

Antigens for detecting toxoplasma infection by monitoring cellular immunity

proteins MIC1 and MIC4 are components of excretory/secretory antigens (ESA) that elicit delayed type hypersensitivity (DTH) responses in infected animals. These antigens are capable of inducing IFN-g secretion by splenic T cells (ELISPOT assay), stimulating T cells to produce cytokines that recruit inflammatory monocytes and neutrophils resulting in a positive luminol test (luminol ear assay), and eliciting a positive skin test in the guinea pig.

Immunologically active fragments of toxoplasma gondii

Antigens ofthat provide specific and strong delayed type hypersensitivity (DTH) immune response, or which stimulate IFN-y secretion, are used for testing subjects for infection. Any skin testing format may be adapted for testing for the delayed type hypersensitivity, including a patch, a needle, or a prong. Presence of DTH indicates infection. Alternate methods of detecting a T cell response including monitoring IFN-y secretion may be used.

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St. Louis, MO, United States of America

Iti Saraav