Members of the family Anelloviridae are emerging circular DNA viruses infecting many species of vertebrates including pigs. To date, members of two distinct genera, Iotatorquevirus , including torque teno sus virus 1a and torque teno sus virus 1b (TTSuV1a and TTSuV1b), and Kappatorquevirus , including torque teno sus virus k2a and torque teno sus virus k2b (TTSuVk2a and TTSuVk2b), have been identified in domestic pigs and wild boars. The goal of this study was to evaluate the prevalence and genetic diversity of these viruses based on 5’ non-coding genes in Chinese swine herds experiencing clinical symptoms. One hundred eighty-five clinical samples from 11 different regions, collected during 2008-2009, were analyzed using a PCR method, and the results revealed a high TTSuV-positive rate of 78.9 % (146/185) in pigs. Moreover, we detected co-infection with multiple TTSuV strains in the same pig. Nucleotide sequencing results revealed greater genetic diversity within the genus Kappatorquevirus than within the genus Iotatorquevirus . In addition, TTSuVk2b, a novel virus discovered in New Zealand in 2012, was also identified in this study. In summary, the present work helps us obtain more knowledge about the epidemiology and genetic diversity of TTSuVs.
Archives of Virology – Springer Journals
Published: Jul 1, 2013
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