title: Immunopathology of acute experimental histoplasmic choroiditis in the primate.
abstract: The immunopathologic features of experimental acute histoplasmic choroiditis were studied in the nonhuman primate. Using an indirect immunoperoxidase technique, a panel of hybridoma-derived anti-human monoclonal antibodies, recognizing distinct lymphoid cell and macrophage surface antigens, have been adapted for use in the primate system. Twenty-two individual foci of histoplasmic choroiditis from five eyes were studied at time periods from 20 to 60 days post intracarotid injection of yeast phase Histoplasma capsulatum. A mononuclear and granulocytic cell infiltration was seen in all lesions. The predominant cell type was the CAPPEL+ T lymphocyte (suppressor/cytotoxic subset). Other cell types found in smaller numbers were OKT4+ T cells (helper/inducer subset), OK7+ (peripheral B lymphocytes), IgD+ (mantle B cells) and OKM1+ cells (macrophages and polymorphonuclear leukocytes). Herein, we present immunopathologic data on the acute phase of experimental ocular histoplasmosis.
mesh_terms: D000208:Acute Disease; D000210:Acute-Phase Reaction; D000818:Animals; D002833:Choroiditis / Q000209:etiology* / Q000276:immunology / Q000473:pathology; D006660:Histoplasmosis; D008251:Macaca; D008253:Macaca mulatta; D013601:T-Lymphocytes / Q000145:classification