de Arruda Leme Raquel, Alfieri Alice Fernandes, Alfieri Amauri Alcindo
Laboratory of Animal Virology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Londrina, Parana, Brazil.
Trop Anim Health Prod. 2012 Dec;44(8):1885-90. doi: 10.1007/s11250-012-0152-y. Epub 2012 Apr 25.
Torque teno sus virus (TTSuV) is responsible for the infection of pig herds around the world. The aim of this study was to analyse the presence of natural infection by both species of TTSuV in suckling piglets from major pig-producing regions of Brazil. Faecal samples (n = 135) from 1 to 3-week-old suckling piglets from the Southern, Southeast and Midwest regions of Brazil were analysed by PCR assay to detect TTSuV1 and 2. TTSuV1 and 2 DNA was identified in 65 (48.1 %) and 23 (17 %) of piglet faecal samples, respectively. Co-infection by both species of TTSuV was detected in 17 (12.6 %) samples. Detection of TTSuV1 was significantly higher than that of TTSuV2 in the three Brazilian regions together (p < 0.05). Based on age of animals, TTSuV1 infection was statistically higher than TTSuV2 in each age group (p < 0.05). For all of the age groups together, no statistical difference was detected in the number of TTSuV1 and 2 positive results (p > 0.05). These findings revealed that TTSuV infection has disseminated in pig herds from different geographic Brazilian regions, and the presence of TTSuV in suckling piglet faecal samples suggested the early infection by the virus and the potential of these animals in spreading the virus.
环曲病毒（TTSuV）可导致全球猪群感染。本研究旨在分析巴西主要生猪产区哺乳仔猪中两种TTSuV的自然感染情况。通过聚合酶链反应（PCR）检测法对来自巴西南部、东南部和中西部地区1至3周龄哺乳仔猪的粪便样本（n = 135）进行分析，以检测TTSuV1和TTSuV2。在仔猪粪便样本中，分别有65份（48.1%）和23份（17%）检测到TTSuV1和TTSuV2 DNA。在17份（12.6%）样本中检测到两种TTSuV的共同感染。在巴西三个地区，TTSuV1的检出率显著高于TTSuV2（p < 0.05）。基于动物年龄，在每个年龄组中，TTSuV1感染在统计学上高于TTSuV2（p < 0.
