Vieira Marcos V, Yasumitsu Carolina Y, Dall Agnol Alais M, Leme Raquel A, Alfieri Alice F, Alfieri Amauri A
Laboratory of Animal Virology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Celso Garcia Cid Road - Campus Universitário, PO Box 10011, Londrina, Paraná, CEP, 86057-970, Brazil.
Multi-User Animal Health Laboratory, Molecular Biology Unit, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Celso Garcia Cid Road - Campus Universitário, PO Box 10011, Londrina, Paraná, CEP, 86057-970, Brazil.
Braz J Microbiol. 2022 Sep;53(3):1701-1706. doi: 10.1007/s42770-022-00767-5. Epub 2022 May 12.
Seneca Valley virus (SVV) is the only representative member of the Senecavirus genus of the Picornaviridae family. Since 2014, SVV has been identified as a causative agent of vesicular disease outbreaks in pigs of different ages from Brazil, the USA, Canada, China, Thailand, Colombia, Vietnam, and India. From May 2020, several pig herds, from the Brazilian states Parana and Santa Catarina reported vesicular disease in different pig categories. This study aimed to report the third wave of SVV outbreaks in pig herds in southern Brazil. A total of 263 biological samples from 150 pigs in 18 pig herds were evaluated. The samples were obtained from pigs with clinical signs of vesicular disease (n = 242) and asymptomatic animals (n = 21). Seneca Valley virus RNA was detected in 96 (36.5%) of the biological samples evaluated, with 89 samples from symptomatic and 7 from asymptomatic pigs. The data show that asymptomatic pigs, but in viremia, are possible sources of infection and can act as carriers and possibly spreaders of SVV to the herd. In this study, we report the third wave of vesicular disease outbreaks caused by SVV in different categories of pigs from herds located in southern Brazil.
塞内卡山谷病毒（SVV）是小核糖核酸病毒科塞内卡病毒属的唯一代表性成员。自2014年以来，SVV已被确定为巴西、美国、加拿大、中国、泰国、哥伦比亚、越南和印度不同年龄段猪群中水泡病疫情的病原体。从2020年5月起，巴西巴拉那州和圣卡塔琳娜州的几个猪群报告了不同猪类出现水泡病。本研究旨在报告巴西南部猪群中第三波SVV疫情。对来自18个猪群中150头猪的263份生物样本进行了评估。样本取自出现水泡病临床症状的猪（n = 242）和无症状动物（n = 21）。在评估的96份（36.5%）生物样本中检测到了塞内卡山谷病毒RNA，其中89份来自有症状的猪，7份来自无症状的猪。数据表明，处于病毒血症状态的无症状猪可能是感染源，可作为SVV的携带者，并可能将病毒传播给猪群。在本研究中，我们报告了巴西南部不同猪类群体中由SVV引起的第三波水泡病疫情。
