Abstract
Porcine astrovirus (PAstV) is distributed worldwide and has been reported to cause diarrhea in pigs. PAstV belongs to the family Astroviridae and genus Mamastrovirus. PAstVs are divided into five diverse genotypes (PAstV1-PAstV5) on the basis of phylogenetic analysis of a part of the RNA-dependent RNA polymerase (RdRp) gene and the capsid gene. However, knowledge regarding the clinical significance and molecular characteristics of PAstV in Haryana, India, is limited. In this study, we investigated the presence of PAstV by RT-PCR of the partial RdRp gene in 110 rectal swabs collected from diarrheic pigs in different parts of Haryana, India. Of these, 35 samples (31.8%) tested positive for PAstV, with the highest positivity observed among weaning piglets 3 to 9 weeks of age (47.7%, 21/44), followed by fattening pigs 9 to 24 weeks of age (28.5%, 8/28). Phylogenetic analysis of the partial RdRp gene revealed circulation of four different genotypes (PAstV1, PAstV2, PAstV4, and PAstV5) in Haryana, with PAstV1 being the predominant genotype. To the best of our knowledge, this is the first report of the presence of PAstV1 and PAstV5 in the pig population of India. The PAstV sequences revealed high genetic variability and genetic heterogeneity in a relatively confined area.
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Acknowledgements
The authors express their gratitude to Professor and Head, Department of Veterinary Microbiology, LUVAS, Hisar, for financial support. The corresponding author was the recipient of a financial grant from Rashtriya Krishi Vikas Yojana Remunerative Approaches for Agriculture and Allied Sector Rejuvenation (RKVY-RAFTAAR), Government of India (Grant No. 4061-C(g)-VPHE-08-O.A).
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Kour, R., Kumar, P., Jindal, N. et al. Molecular detection and characterization reveals circulation of multiple genotypes of porcine astrovirus in Haryana, India. Arch Virol 166, 2847–2852 (2021). https://doi.org/10.1007/s00705-021-05195-8
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DOI: https://doi.org/10.1007/s00705-021-05195-8