Serologic diagnosis of bovine tuberculosis :
The passive hemagglutination (PHA) test, hemolytic modification (HL), kaolin agglutination (KA) test, and complement-fixation (CF) test were studied for the diagnosis of bovine tuberculosis. The KA test was the most reliable in detecting tuberculous cattle, whereas PHA, HL, and CF tests did not give sharp distinction between titers from tuberculin reactors without lesions, tuberculous cattle and healthy cattle. On the other hand, in instances of KA testing, nonspecific KA was observed in some healthy cattle from tuberculosis-free districts. The nonspecific agglutinin was found in the 19S fraction of serum and could be eliminated by adsorption with thick kaolin suspension (1 mg/ml) before the KA test was done. Specificity of the 19S antibody against phosphatide from tubercle bacilli seemed better than that of the 19S polysaccharide antibody and of the 7S antibody against phosphatide and polysaccharide fractions. Serum samples from both artificially and naturally infected cattle prepared from blood collected 1 to 2 weeks after tuberculin testing contained fourfold or greater quantities of antibody than serum prepared from blood collected before tuberculin testing
| Main Authors: | , |
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| Format: | biblioteca |
| Language: | eng |
| Published: |
Jul
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| Subjects: | DIAGNOSTICO DE LABORATORIO, INMUNODIAGNOSTICO, TUBERCULOSIS BOVINA, PRUEBA TUBERCULINICA, TECNICAS INMUNOLOGICAS, PRUEBA DE HEMAGLUTINACION, PRUEBA DE FIJACION DEL COMPLEMENTO, REACCIONES DE AGLUTINACION, ESPECIFICIDAD, REACCION ANTIGENO-ANTICUERPO, ANTICUERPOS, GANADO BOVINO, |
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