PDF(Pubmed)
Abstract：
Two surveys were conducted to assess the prevalence and risk factors of ovine caseous lymphadenitis (CL) and explore the association between its superficial and visceral forms in Sardi sheep in Settat province, Morocco. A total of 1521 sheep, including 318 lambs < 6 months, 572 young sheep aged 6-24 months, and 631 adult sheep > 24 months, were examined from 57 flocks. Superficial CL prevalence levels were as follows: 69/318 in lambs, 292/572 in young sheep, and 114/631 in adult sheep. Additionally, 2124 sheep, including 1813 young and 311 adult sheep, were inspected in slaughterhouses ante- and post-mortem. Among all infected animals, the prevalence of visceral abscesses was notably higher in adult sheep (83%, OR = 9.8, 95% CI = 5.5-17.2) compared to young sheep (35%). Data on flock size, sex, age, body condition score, rearing methods, and hygienic measures were collected. Suspected CL cases were confirmed using quadruplex-PCR. Poor barn ventilation, lack of abscess control, and younger age were identified as key risk factors for CL. Additionally, a high percentage (89%) of animals with thoracic abscesses did not display superficial lesions. While age and abscess control have been reported in previous studies, barn ventilation appears to be a new, but important, risk factor. In conclusion, the identified risk factors in Settat province are linked to breeding management practices. Implementing regular abscess control measures and improving barn ventilation are essential for CL prevention.
摘要：
进行了两项调查，以评估Settat省Sardi绵羊的绵羊干酪性淋巴结炎（CL）的患病率和危险因素，并探讨其浅表和内脏形式之间的关系。摩洛哥。共1521只羊，包括318只<6个月的羔羊，572只6-24个月的幼羊，和631只成年绵羊>24个月，从57群羊群中检查。浅表CL患病率水平如下：羔羊69/318，292/572幼羊，成年绵羊和114/631。此外,2124只羊,包括1813只幼羊和311只成年羊，在屠宰场前和死后检查。在所有受感染的动物中，成年绵羊的内脏脓肿患病率明显较高(83%，OR=9.8，95％CI=5.5-17.2）与幼羊（35％）相比。羊群大小的数据，性别,年龄,身体状况评分,饲养方法,并收集了卫生措施。使用四重PCR确认疑似CL病例。谷仓通风不良,缺乏脓肿控制，年龄和年龄被确定为CL的关键危险因素。此外,高比例（89％）的胸脓肿动物没有表现出浅表病变。虽然在以前的研究中已经报道了年龄和脓肿控制，谷仓通风似乎是一个新的，但重要的是,风险因素。总之,Settat省已确定的风险因素与育种管理实践有关。定期实施脓肿控制措施和改善谷仓通气对预防CL至关重要。
