A Novel Subgenotype of Torque teno Virus 1 (TTSuV1) in Slaughter Pigs in China |
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Authors: | Jinhai Huang Yi Li Mengmeng Liu Yihe Xia Zhirong Li |
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Institution: | 1. School of Chemical Engineering &Technology, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin, 300072, China 2. Tianjin Institute of Animal Health Inspection, Tianjin, 300000, China
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Abstract: | TTsuV1 can cause persistent infection and unidentified clinical signs in pigs. In this study, a survey of TTsuV1 prevalence was conducted in slaughter pigs from Henan, Liaoning, and Shandong provinces in China. A total of 180 swine lymphoid tissues were assayed by PCR with primers targeting the conserved 5′-untranslated region (5′-UTR). The results showed that a 17.8 % positive rate, and different genotypes were detected. TTSuV1 presented higher viral load and prevalence in inguinal lymph node than in submandibular lymph node samples. All TTsuV1 isolates have 84–100 % nucleotide sequence homology in the 5′-UTR region and can be grouped into three subgenotypes (TTsuV1a-1, TTsuV1a-2, and TTsuV1b). Notably, the novel genetic subtype TTsuV1b was first reported in slaughter pigs. |
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