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首页> 外文期刊>Tropical Animal Health and Production >Prevalence of porcine reproductive and respiratory syndrome virus (PRRSV) antigen-positive uterine tissues in gilts culled due to reproductive disturbance in Thailand
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Prevalence of porcine reproductive and respiratory syndrome virus (PRRSV) antigen-positive uterine tissues in gilts culled due to reproductive disturbance in Thailand

机译：在泰国由于繁殖障碍而被淘汰的猪繁殖与呼吸综合征病毒（PRRSV）抗原阳性子宫组织的患病率

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摘要

The objective of the present study was to determine the prevalence of porcine reproductive and respiratory syndrome virus (PRRSV) antigen-positive uterine tissue in gilts culled due to reproductive disturbance in relation to age at culling, reasons for culling, herds, and PRRSV vaccination. Uterine tissues of 100 gilts from six swine herds in Thailand were collected. The immunohistochemistry was performed to detect the PRRSV antigen using a polymer-based non-avidin–biotin technique. PRRSV was detected in the cytoplasm of the macrophages in the subepithelial connective tissue layers of the endometrium in 33.0% of the culled gilts. The detection of PRRSV antigen varied among the herds from 14.3% to 80.0% (P = 0.018). The detection of PRRSV in the uterine tissues at different ages was not statistically different (29.6%, 39.4%, and 40.9% in gilts culled at 6–8, 9–10, and 11–16 months of age, respectively, P = 0.698), similar to the reasons for culling (P = 0.929). PRRSV antigen was found in 24.5% of the gilts vaccinated against the EU-strain-modified-live PRRSV vaccine and in 23.1% of the gilts vaccinated against the US-strain-modified-live PRRSV (P = 0.941). The level of antibody titers against PRRSV had no impact on PRRSV antigen detection in the uterine tissues. Similarly, the detection of PRRSV antigen did not differ between the virgin gilts (35.4%) and the gilts mated before culling (30.8%) (P = 0.622). It can be concluded that PRRSV remains in the uterine tissue of the infected gilts for several months even though vaccinations and acclimatization have been carried out.
机译：本研究的目的是确定因繁殖干扰而淘汰的后备母猪所淘汰的猪繁殖与呼吸综合症病毒（PRRSV）抗原阳性子宫组织的患病率，淘汰的原因，淘汰的原因，畜群和PRRSV疫苗接种。从泰国的六个猪群中收集了100头母猪的子宫组织。使用基于聚合物的非亲和素-生物素技术进行免疫组织化学检测PRRSV抗原。在33.0％的淘汰后备母猪的子宫内膜上皮下结缔组织层巨噬细胞的细胞质中检测到PRRSV。猪群中PRRSV抗原的检出率从14.3％到80.0％不等（P = 0.018）。不同年龄子宫组织中PRRSV的检出率无统计学差异（分别在6-8、9-10和11-16个月淘汰的小母猪中分别有29.6％，39.4％和40.9％，P = 0.698） ），类似于剔除的原因（P = 0.929）。 PRRSV抗原在24.5％的抗EU株修饰的活PRRSV疫苗接种的小母猪中和23.1％的US株的修饰活PRRSV疫苗接种的小母猪中被发现（P = 0.941）。抗PRRSV的抗体滴度水平对子宫组织中PRRSV抗原的检测没有影响。同样，在原始小母猪（35.4％）和淘汰后交配的小母猪（30.8％）之间，PRRSV抗原的检测没有差异（P = 0.622）。可以得出结论，即使已经进行了疫苗接种和驯化，PRRSV仍在感染后备母猪的子宫组织中保留了几个月。

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