Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.
Transbound Emerg Dis. 2021 Nov;68(6):3043-3047. doi: 10.1111/tbed.13975. Epub 2021 Jan 17.
The objective of this study was to determine the prevalence of porcine circovirus type 2e (PCV2e) over other PCV2 genotypes (a, b, c and d) from the lymph nodes of 1,550 randomly selected slaughter pigs. Samples were obtained at a rate of five samples per farm from 310 farms between January 2018 and May 2020. Of the 1,550 lymph node samples, PCV2 DNA was detected in 762 (49.20%) samples. Among the 762 PCV2 DNA-positive samples, a single PCV2 genotype was detected in 744 samples, while multiple PCV2 genotypes were only detected in 18 samples. Of the 744 single infection cases, PCV2d was the most prevalent with 709 cases, followed by PCV2b (15 cases), PCV2a (14 cases) and PCV2e (6 cases). Of the 18 multiple infection cases, PCV2a+PCV2d was the most prevalent (7 cases) followed by PCV2b+PCV2d (3 cases), PCV2b+PCV2e (3 cases), PCV2a+PCV2b+PCV2d (3 cases) and PCV2a+PCV2b (2 cases). No PCV2c was detected in any of the single or multiple infection cases. The results of prevalence identified PCV2d as the current dominant genotype, while the newly emerging PCV2e maintained the lowest prevalence among the evaluated swine farms.
本研究旨在从 1550 头随机选择的屠宰猪的淋巴结中确定猪圆环病毒 2 型 e 型 (PCV2e) 相对于其他 PCV2 基因型 (a、b、c 和 d) 的流行率。2018 年 1 月至 2020 年 5 月，从 310 个农场中，每个农场以 5 个样本的比例获得样本。在 1550 个淋巴结样本中，762 个样本 (49.20%) 检测到 PCV2 DNA。在 762 个 PCV2 DNA 阳性样本中，744 个样本检测到单一 PCV2 基因型，而 18 个样本仅检测到多种 PCV2 基因型。在 744 例单一感染病例中，PCV2d 最为流行，有 709 例，其次是 PCV2b (15 例)、PCV2a (14 例) 和 PCV2e (6 例)。在 18 例多重感染病例中，PCV2a+PCV2d 最为流行 (7 例)，其次是 PCV2b+PCV2d (3 例)、PCV2b+PCV2e (3 例)、PCV2a+PCV2b+PCV2d (3 例)和 PCV2a+PCV2b (2 例)。在任何单一或多重感染病例中均未检测到 PCV2c。流行率结果表明 PCV2d 为当前优势基因型，而新出现的 PCV2e 在评估的养猪场中保持最低流行率。
