Teles José Andreey Almeida, Nascimento Sérgio Alves, Melo Elialdo Xavier, Almeida Erivânia Camelo, Marvulo Maria Fernanda Vianna, Rizzo Huber, Nogueira Denise Batista, de Azevedo Sérgio Santos, Silva Jean Carlos Ramos, Castro Roberto Soares
Post-Graduate Program in Veterinary Medicine, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, Dois Irmãos, Recife, PE, Brazil; Veterinary Medicine Course, João Pessoa Uninassau College, Av. Presidente Epitácio Pessoa, 1201, Estados, João Pessoa, PB, Brazil.
Post-Graduate Program in Veterinary Medicine, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, Dois Irmãos, Recife, PE, Brazil.
Prev Vet Med. 2023 Feb;211:105814. doi: 10.1016/j.prevetmed.2022.105814. Epub 2022 Dec 1.
Serum samples (n = 1532) were collected between May 2011 to April 2012 from goats from 76 herds (49 from dairy farms and 27 herds for genetic improvement) from three geographical regions from the state of Pernambuco, Brazil: Zona da Mata, Agreste, and Sertão. Samples were processed using agar gel immunodiffusion test, with p28 CAEV antigen. The objective was to determine the risk factors for small ruminant lentivirus (SRLV) in dairy goats and goats with high genetic value. Overall, seroprevalence was 13.7% (210/1532) [95% CI: 12-15.4%] in animals and 67.1% (51/76) [95% CI: 56.5%- 77.7%] in herds. In dairy farms the seroprevalence was 73.5% (36/49) [95% CI: 61.1%- 85.8%], and in properties with animals of high genetic value it was 55.6% (15/27) [95% CI: 36.8%- 74.3%]. Robust Poisson regression analysis adjusted by the random effect of the herd showed that risk factors were: importing bucks from another Brazilian state (prevalence ratio [PR] = 4.73 [95% CI: 2.05; 10.88]), not isolating sick animals (PR = 3.27 [95% CI: 2.24; 4.76]), and participating in fairs/animal crowding (PR = 1.52 [95% CI: 1.09; 2.11]). Prevalence results show that SRLV is present in caprine herds in the state of Pernambuco and identified risk factors are strongly related to animal transit. Considering the epidemiological situation, the first step for mitigating the consequences of this disease would be controlling animal transit.
2011年5月至2012年4月期间,从巴西伯南布哥州三个地理区域(马塔区、阿格雷斯特和塞尔唐)的76个畜群(49个奶牛场和27个用于遗传改良的畜群)的山羊中采集了血清样本(n = 1532)。样本采用琼脂凝胶免疫扩散试验,使用p28 CAEV抗原进行处理。目的是确定奶山羊和具有高遗传价值山羊中小反刍兽疫病毒(SRLV)的风险因素。总体而言,动物的血清阳性率为13.7%(210/1532)[95%置信区间:12 - 15.4%],畜群的血清阳性率为67.1%(51/76)[95%置信区间:56.5% - 77.7%]。在奶牛场中,血清阳性率为73.5%(36/49)[95%置信区间:61.1% - 85.8%],在具有高遗传价值动物的养殖场中为55.6%(15/27)[95%置信区间:36.8% - 74.3%]。通过畜群随机效应调整的稳健泊松回归分析表明,风险因素包括:从巴西另一个州引进公羊(患病率比[PR] = 4.73 [95%置信区间:2.05;10.88])、不隔离患病动物(PR = 3.27 [95%置信区间:2.24;4.76])以及参加集市/动物拥挤活动(PR = 1.52 [95%置信区间:1.09;2.11])。患病率结果表明,SRLV存在于伯南布哥州的山羊畜群中,且确定的风险因素与动物运输密切相关。考虑到流行病学情况,减轻这种疾病后果的第一步将是控制动物运输。