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Cellular immune response to common mycobacterial antigens in subjects seropositive for Trypanosoma cruzi. 1994

O A Bottasso, and N Ingledew, and M Keni, and J Morini, and J F Pividori, and G A Rook, and J L Stanford
Division Inmunologia, Facultad de Ciencias Medicas, University Nacional de Rosario, Argentina.

The immune response is impaired in the silent stage of Chagas' disease. We used quadruple skin-testing with new tuberculins in 37 adults who were symptom-free but seropositive for Trypanosoma cruzi and in 37 matched seronegative controls. Whereas 19% of controls responded to common mycobacterial antigens, none of the Chagas' seropositive group responded to them (p < 0.006), demonstrating specificity in their unresponsiveness. The enhanced tuberculin reactivity after BCG vaccination in the control group was suppressed in seropositive subjects (p < 0.002). Selective loss of response to common mycobacterial antigens may have implications for the autoimmune pathology of Chagas' disease, and for susceptibility to tuberculosis, leprosy, and HIV disease.

UI MeSH Term Description Entries
D007111 Immunity, Cellular Manifestations of the immune response which are mediated by antigen-sensitized T-lymphocytes via lymphokines or direct cytotoxicity. This takes place in the absence of circulating antibody or where antibody plays a subordinate role. Cell-Mediated Immunity,Cellular Immune Response,Cell Mediated Immunity,Cell-Mediated Immunities,Cellular Immune Responses,Cellular Immunities,Cellular Immunity,Immune Response, Cellular,Immune Responses, Cellular,Immunities, Cell-Mediated,Immunities, Cellular,Immunity, Cell-Mediated,Response, Cellular Immune
D008297 Male Males
D009163 Mycobacterium bovis The bovine variety of the tubercle bacillus. It is called also Mycobacterium tuberculosis var. bovis. BCG,Calmette-Guerin Bacillus
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000953 Antigens, Protozoan Any part or derivative of any protozoan that elicits immunity; malaria (Plasmodium) and trypanosome antigens are presently the most frequently encountered. Protozoan Antigens
D012882 Skin Tests Epicutaneous or intradermal application of a sensitizer for demonstration of either delayed or immediate hypersensitivity. Used in diagnosis of hypersensitivity or as a test for cellular immunity. Skin Test,Test, Skin,Tests, Skin
D014349 Trypanosoma cruzi The agent of South American trypanosomiasis or CHAGAS DISEASE. Its vertebrate hosts are man and various domestic and wild animals. Insects of several species are vectors. Trypanosoma cruzus,cruzi, Trypanosoma

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