Abstract
Group A rotaviruses play an important role in causing gastroenteritis and mortality in buffalo (Bubalus bubalis) calves. A number of assays like RNA-polyacrylamide gel electrophoresis (RNA-PAGE), enzyme-linked immunosorbent assay (ELISA), reverse transcription polymerase chain reaction (RT-PCR) and virus isolation have been employed for rotavirus diagnosis. We evaluated the comparative efficacy of different assays for detection of group A rotavirus in buffalo calves. A total of 455 faecal samples collected from five organized farms in northern India were screened by monoclonal antibody based ELISA, 33 (7.25%) samples were positive for group A rotavirus. The percent positivity ranged from 3.22% to 28% in different organized farms. The same samples were also tested by RNA-PAGE, which revealed classical 11 segments with 4:2:3:2 migration patterns in 14 faecal samples showing 3.08% positivity. Virus isolation was successfully done from 21 (4.61%) samples. However, only 15 (3.3%) samples yielded a specific product of 864 and 1,011 bp for VP4 and VP7 genes, respectively, by RT-PCR. The sensitivity and specificity of ELISA, RNA-PAGE and RT-PCR was 100%, 66.67% and 71.43% and 97%, 100% and 100%, respectively, considering virus isolation as standard test. ELISA being simple, fast and sensitive assay can be used as routine laboratory test for the diagnosis of group A rotavirus and field epidemiological studies.
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The authors are thankful to ICAR, New Delhi for providing financial support in the form of research project on “Molecular studies on rotaviruses of avian, bovine and human origins and development of multiplex RT-PCR for diagnosis” and CCSHAU, Hisar for providing infrastructural support.
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Manuja, B.K., Prasad, M., Gulati, B.R. et al. Comparative efficacy of immunological, molecular and culture assays for detection of group A rotavirus from faecal samples of buffalo (Bubalus bubalis) calves. Trop Anim Health Prod 42, 1817–1820 (2010). https://doi.org/10.1007/s11250-010-9642-y
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DOI: https://doi.org/10.1007/s11250-010-9642-y