This article demonstrates how the seasonal predominance of a new rotavirus strain in Asuncion, Paraguay is correlated with a wide spectrum of age groups of children infected in that given season. Therefore, this study provides new evidence to support the idea that seasonal shift of rotavirus strains is a possible mechanism used by the virus to evade herd immunity (acquired by the population due to previous infections) and, thus, ultimately persist in that population.
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Molecular Characterization and Pathogenicity Analysis of Porcine Rotavirus A.
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National Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China.
Porcine rotavirus A (RVA) is one of the major etiological agents of diarrhea in piglets and constitutes a significant threat to the swine industry. A molecular epidemiological investigation was conducted on 2422 diarrhea samples from Chinese pig farms to enhance our understanding of the molecular epidemiology and evolutionary diversity of RVA. The findings revealed an average RVA positivity rate of 42% (943/2422), and the study included data from 26 provinces, primarily in the eastern, southern and southwestern regions.
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Group A rotaviruses (RVA) and group C rotaviruses (RVC) are important enteric pathogens in swine. Comprehensive studies investigating porcine rotaviruses in Canada are necessary to enhance understanding of the frequency, impacts, and dynamics of these infections in swine herds. This study aims to estimate the prevalence of RVA and RVC, describe circulating strains, and assess the association of rotaviruses with diarrhea at the piglet, litter, and batch levels in Canadian farrowing swine productions.
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Institute for Vaccine Research and Development, Hokkaido University, Sapporo, 001-0021, Japan; Department of Disease Control, School of Veterinary Medicine, The University of Zambia, Lusaka, 10101, Zambia; One Health Research Center, Hokkaido University, Sapporo, 060-0818, Japan; International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo, 001-0020, Japan; Africa Center of Excellence for Infectious Diseases of Humans and Animals, The University of Zambia, Lusaka, 10101, Zambia. Electronic address:
Rotavirus C (RVC) causes acute gastroenteritis in neonatal piglets. Despite the clinical importance of RVC infection, the distribution and prevalence in pig populations in most African countries remains unknown. In this study, we identified RVC in Zambian pigs by metagenomic analysis.
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State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, PR China. Electronic address:
Rotavirus Group A (RVA) is a primary pathogen that causes viral diarrhea in humans and animals. Porcine rotaviruses (PoRVs) are widely epidemic in pig farms in China, causing great economic losses to the swine industry. In the past 30 years, the G5 RVA had been the main epidemic genotype in pig farms worldwide.
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ICMR- National Institute for Research in Bacterial Infections (formerly ICMR-NICED), Kolkata, India. Electronic address:
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