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Comparative evaluation of Serum Plate Agglutination Test (SPAT) and Rose Bengal Plate Test (RBPT) for diagnosis of Brucella abortus in sera of cattle and human

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Research Paper 01/05/2017
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Comparative evaluation of Serum Plate Agglutination Test (SPAT) and Rose Bengal Plate Test (RBPT) for diagnosis of Brucella abortus in sera of cattle and human

Fida Muhammad Khan, Muhammad Subhan Qureshi, Shah Nawaz, Muhammad Aftab, Umar Sadique, Ziaul Islam, Zia Ur Rahman Khalil
Int. J. Biosci.10( 5), 367-371, May 2017.
Certificate: IJB 2017 [Generate Certificate]
Key: BrucellosisComparisoni-ELISARBPTSPAT

Abstract

To diagnose bovine brucellosis, various conventional and advance molecular techniques are in practice. No single serological test is appropriate in all epidemiological circumstances; each of them has a number of restrictions predominantly for screening individual animals and human. The performance characteristics of Serum Plate Agglutination Test (SPAT) and Rose Bengal Plate Test (RBPT) for diagnosis of Brucella abortus were evaluated by using Indirect Enzyme Linked Immunosorbant Assay (i-ELISA) as a Gold Standard. A total of 410 human and 202 cattle blood sera were screened. In human sera, RBPT detected 75 positive samples, while SPAT detected 78 positive samples. In cattle sera, RBPT detected 29 positive samples, while SPAT detected 32 positive samples. In cattle sera, RBPT showed high sensitivity 82.60%, specificity 94.72%, positive predictive value 76% and negative predictive value 96.41% as compared to SPAT which showed 81.15% sensitivity, 93.54% specificity, 71.79% positive predictive value and 96.08% negative predictive value. Similarly, in human sera RBPT showed high sensitivity 76%, specificity 94.35%, positive predictive value 65.51% and negative predictive value 96.53%, while SPAT showed 72% sensitivity, 92.09% specificity, 56.25% positive predictive value and 95.88%negative predictive. In the present study, although RBPT showed comparatively better result than SPAT but still its sensitivity and specificity is low, so it can be used as a screening test but cannot be used as a confirmatory test.

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