Histoplasmin
Mostrando 1-12 de 51 artigos, teses e dissertações.
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1. Histoplasmose InfecÃÃo em Pacientes HIV/AIDS Residentes na Cidade de Fortaleza, Cearà / Histoplasmosis infection in patients HIV / AIDS in the city of Fortaleza, CearÃ
A histoplasmose à uma doenÃa causada por Histoplasma capsulatum var. capsulatum, nos seres humanos e em vÃrias outras espÃcies de animais. Trata-se de um fungo encontrado na natureza, principalmente em locais ricos em fezes de aves e morcegos: galinheiros sujos e abandonados, ambiente de cavernas, construÃÃes antigas, cÃpula de prÃdios e Ãrvores oca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/05/2009
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2. Immunological Studies with an M-Deficient Histoplasmin Skin-Test Antigen
Previous studies have shown that a single skin test to histoplasmin may induce complement-fixing antibodies or M precipitins (or both) to histoplasmin in histoplasmin-sensitive, but serologically negative, individuals. Ideally a skin-test antigen should be one which detects hypersensitivity without stimulating humoral antibodies. Histoplasmin skin-test antig
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3. Characterization of antigenic determinants in histoplasmin that stimulate Histoplasma capsulatum-reactive T cells in vitro.
Although antigen-reactive T lymphocytes play a central role in the host response to Histoplasma capsulatum, little is known of the nature of Histoplasma antigens recognized by these cells in vitro. Employing a murine T-cell line and two clones that are reactive with histoplasmin, we examined whether activation of T cells by histoplasmin required the presence
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4. Cross-Reactivity Between Antigens of Coccidioides immitis, Histoplasma capsulatum, and Blastomyces dermatitidis in Lymphocyte Transformation Assays
The cross-reactivity of four Coccidioides antigens, three Histoplasma antigens, and two Blastomyces antigens were determined in lymphocyte transformation assays of 11 coccidioidin-reactive, histoplasmin-nonreactive subjects (group I), 13 coccidioidin-nonreactive, histoplasmin-reactive persons (group II), and 13 subjects who were skin test negative to both an
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5. Effects of a Single Histoplasmin Skin Test on the Serological Diagnosis of Histoplasmosis
Numerous reports have indicated that a single histoplasmin skin test may stimulate humoral antibodies to Histoplasma capsulatum antigens in histoplasmin-hypersensitive individuals. Although these investigations concur that antibody elevations are evoked, they vary in the reported degree of incidence and response induced, and they cast doubt on the interpreta
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6. Apparent false positive histoplasmin latex agglutination tests in patients with tuberculosis.
Serum specimens from patients admitted to a respiratory disease hospital were examined by the histoplasmin latex agglutination, the complement fixation, and the agar gel immunodiffusion tests. Of 300 sera examined, 21 (7.0%) gave an apparent false positive reaction at a dilution of 1:16 or greater. Fourteen (66%) of the 21 patients studied has culturally pro
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7. Evaluation of Histoplasmin for the Presence of H and M Antigens: Some Difficulties Encountered in the Production and Evaluation of a Product Suitable for the Immunodiffusion Test
The development of a single histoplasmin suitable for use in immunodiffusion testing of a variety of human histoplasmosis sera depends not only upon the presence of both antigens, but on relative concentration of one to the other, and perhaps on the chemical characteristics of the H and M antigens of a given strain.
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8. Monoclonal antibodies against the M-protein and carbohydrate antigens of histoplasmin characterized by the enzyme-linked immunoelectrotransfer blot method.
Monoclonal antibodies (MAbs) of two different specificities were produced by immunizing mice with the semipurified M antigen of histoplasmin. One type, from clone CB4, was an immunoglobulin M that precipitated a polysaccharide present in histoplasmin and also formed immunoprecipitates with a cross-reactive polysaccharide present in extracts of Blastomyces de
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9. Immunoglobulin E in histoplasmosis.
Immunoglobulin M, G, A, and E serum levels were quantitated in 20 patients with active histoplasmosis (group I), 24 healthy subjects who were skin test positive to histoplasmin (group II), and 47 healthy persons who were skin test negative to histoplasmin (group III). The results established that patients with this disease have increased immunoglobulin G (P
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10. Factors Influencing Histoplasmin Formation
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11. Intra-Pulmonary Calcification and Histoplasmin Sensitivity
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12. Relatedness Analyses of Histoplasma capsulatum Isolates from Mexican Patients with AIDS-Associated Histoplasmosis by Using Histoplasmin Electrophoretic Profiles and Randomly Amplified Polymorphic DNA Patterns
The present paper analyzes the histoplasmin electrophoretic profiles and the randomly amplified polymorphic DNA (RAPD) patterns of the fungus Histoplasma capsulatum isolated from Mexican patients with AIDS-associated histoplasmosis. Clinical isolates from Guatemala, Colombia, and Panama, as well as H. capsulatum isolates from different sources in nature, wer
American Society for Microbiology.