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A descriptive survey of porcine epidemic diarrhea in pig populations in northern Vietnam

机译：越南北部猪群猪流行性腹泻的描述性调查

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摘要

Porcine epidemic diarrhea (PED) virus (PEDV) is a globally emerging and re-emerging epizootic swine virus that causes massive economic losses in the swine industry, with high mortality in piglets. In Vietnam, PED first emerged in 2009 and has now developed to an endemic stage. This is the first cross-sectional survey performed to evaluate the proportion of PEDV-positive swine farms in Vietnam from January 2018 to February 2019. Fecal samples from 327 pig farms in northern Vietnam were collected and tested for PEDV infection by reverse transcription-loop-mediated isothermal amplification (RT-LAMP) method. The proportion of PEDV-positive farms was 30.9% and PEDV-positive farms were distributed throughout the study area. The highest proportion of PEDV-positive farms was 70% (7/10) among nucleus production type farms (P < 0.05). Higher proportions of PEDV-positive farms were found in the Northeast and Red River Delta areas, which are the major areas of pig production (P < 0.05). The proportion of PEDV-positive farms was higher among larger farms (P < 0.05). Our findings illustrate the high proportion of PEDV-positive farms in the Vietnamese pig population and will help to better understand the epidemiological dynamics of PED infection, to estimate impact, and establish and improve prevention and control measures.
机译：猪流行性腹泻（PED）病毒（PEDV）是全球性的新兴和重新出现的猪病毒，导致猪工业中的大规模经济损失，仔猪的死亡率高。在越南，Ped于2009年首次出现，现在已经发展到地方阶段。这是在2018年1月至2019年2月评估越南的Pedv阳性猪场比例的第一次横断面调查。由越南北部327个猪场的粪便样本被逆转录 - 环路收集并测试了PEDV感染 - 介导的等温扩增（RT灯）方法。 PEDV阳性农场的比例为30.9％，在整个研究区域中分布了PEDV阳性农场。最高比例的PEDV阳性农场是核心生产型农场中70％（7/10）（P <0.05）。在东北和红河三角洲地区发现了更高比例的PEDV阳性农场，这是猪生产的主要领域（P <0.05）。较大农场的PEDV阳性农场比例较高（P <0.05）。我们的研究结果说明了越南猪群中的Pedv阳性农场比例大，并有助于更好地了解PED感染的流行病学动态，以估算影响，建立和改进预防和控制措施。

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