ABSTRACT
Bovine tuberculosis, a chronic disease of animals is caused by species of Mycobacterium tuberculosis complex (MTC) and it remains a potential threat to animals as well as humans. Differentiation of the species of MTC is required for epidemiological and diagnostic purpose. The present study evaluated the presence of different species of MTC in bovines using gyrB-restriction fragment length polymorphism analysis. In this study, blood and milk samples from 50 milch animals which were positive reactors of comparative intradermal tuberculin test were collected. Screening of MTC was done by IS6110-PCR using primers INS1/INS2 specific for MTC. The positive samples were further identified using gyrB- Restriction fragment length polymorphism analysis. Out of 50 positive reactors to CITT, only 4 (8%) animal were positive for MTC by IS6110-PCR. And gyrB-RFLP analysis using RsaI and SacII showed two positive for M. bovis and two animals for M. tuberculosis. Thus, gyrB-RFLP could be used as an additional tool in differential diagnosis of mycobacterial diseases thereby able to differentiate species of MTC
ABSTRACT
Brucellosis is highly infectious zoonotic disease that causes huge economic losses to livestock farmers by affecting the reproductive potential of animals causing last trimester abortions and infertility. In the present study evaluation of different serological tests to diagnose the seroprevalence of brucellosis in bovines with history of abortion using various serological tests [Rose Bengal Plate Test (RBPT), modified rose bengal plate test (mRBPT), microtitre plate agglutination test (MAT) and indirect enzyme linked immunosorbent assay (i-ELISA)] was carried out. A total of 134 blood samples of cattle and buffalo with history of abortion were collected from organized and unorganized farms. Seroprevalence by mRBPT, RBPT, MAT and i-ELISA was 75.37%, 67.91%, 72.38% and 72.38%, respectively. In organized farms, prevalence of 78.12%, 81.25%, 78.12% and 81.25% while in unorganized farms prevalence of 64.70%, 73.52%, 70.58% and 69.60% was reported by RBPT, mRBPT, MAT and i-ELISA, respectively. The sensitivity and specificity of serological tests by keeping i-ELISA as gold standard were also calculated and the results revealed that sensitivities of RBPT, mRBPT and MAT were 91.75%, 97.94% and 96.91%, respectively, whereas specificities were 94.59%, 83.78% and 91.89%, respectively.