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Prevalence, Time of Infection, and Diversity of Porcine Reproductive and Respiratory Syndrome Virus in China

文献类型： 外文期刊

作者： Li, Chaosi 1 ; Fan, Aihua 1 ; Liu, Zhicheng 2 ; Wang, Gang 4 ; Zhou, Lei 5 ; Zhang, Hongliang 7 ; Huang, Lv 1 ; Zhang, Jianfeng 2 ; Zhang, Zhendong 8 ; Zhang, Yan 9 ;

作者机构： 1.Boehringer Ingelheim Anim Hlth Shanghai Co Ltd, Shanghai 200040, Peoples R China

2.Guangdong Acad Agr Sci, Inst Anim Hlth, Key Lab Livestock Dis Prevent Guangdong Prov, Guangzhou 510640, Peoples R China

3.Inner Mongolia Agr Univ, Coll Vet Med, Hohhot 010010, Peoples R China

4.Shandong Agr Univ, Coll Vet Med, Tai An 271000, Peoples R China

5.China Agr Univ, Coll Vet Med, Natl Key Lab Vet Publ Hlth & Safety, Beijing 100094, Peoples R China

6.China Agr Univ, Coll Vet Med, Key Lab Anim Epidemiol, Minist Agr & Rural Affairs, Beijing 100094, Peoples R China

7.Chinese Acad Agr Sci, Harbin Vet Res Inst, State Key Lab Anim Dis Control & Prevent, Harbin 150001, Peoples R China

8.Jiangsu Univ Sci & Technol, Sch Biotechnol, Zhenjiang 212000, Peoples R China

9.Heilongjiang Acad Agr Sci, Branch Anim Husb & Vet, Qiqihar, Peoples R China

关键词： PRRSV; prevalence; three-sample strategy; time of infection; wild strain diversity

期刊名称：VIRUSES-BASEL （ 影响因子：4.7； 五年影响因子：4.8 ）

ISSN：

年卷期： 2024 年 16 卷 5 期

页码：

收录情况： SCI

摘要： Porcine reproductive and respiratory syndrome virus (PRRVS) is a major swine viral pathogen that affects the pig industry worldwide. Control of early PRRSV infection is essential, and different types of PRRSV-positive samples can reflect the time point of PRRSV infection. This study aims to investigate the epidemiological characteristics of PRRSV in China from Q4 2021 to Q4 2022, which will be beneficial for porcine reproductive and respiratory syndrome virus (PRRSV)control in the swine production industry in the future. A total of 7518 samples (of processing fluid, weaning serum, and oral fluid) were collected from 100 intensive pig farms in 21 provinces, which covered all five pig production regions in China, on a quarterly basis starting from the fourth quarter of 2021 and ending on the fourth quarter of 2022. Independent of sample type, 32.1% (2416/7518) of the total samples were PCR-positive for PRRSV, including 73.6% (1780/2416) samples that were positive for wild PRRSV, and the remaining were positive for PRRSV vaccine strains. On the basis of the time of infection, 58.9% suckling piglets (processing fluid) and 30.8% weaning piglets (weaning serum) showed PRRSV infection at an early stage (approximately 90% of the farms). The sequencing analysis results indicate a wide range of diverse PRRSV wild strains in China, with lineage 1 as the dominant strain. Our study clearly demonstrates the prevalence, infection stage, and diversity of PRRSV in China. This study provides useful data for the epidemiological understanding of PRRSV, which can contribute to the strategic and systematic prevention and control of PRRSV in China.

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