Martins Natália Soares, Dos Santos Carolina Caetano, da Motta Sara Patron, Moreira Andrios da Silva, Farias Nara Amélia da Rosa, Ruas Jerônimo Lopes
Veterinarian, DSc., Resident. Programa de Residência em Área Profissional da Saúde: Medicina Veterinária - Doenças e Zoonoses Parasitárias. Departamento de Veterinária Preventiva, Faculdade de Veterinária, Universidade Federal de Pelotas (UFPel). Capão do Leão, RS, Brazil.
Biologist, MSc. Programa de Pós-graduação em Microbiologia e Parasitologia (PPGMPar). Departamento de Microbiologia e Parasitologia, Instituto de Biologia, UFPel. Capão do Leão, RS, Brazil.
Braz J Vet Med. 2022 Jul 12;44:e001522. doi: 10.29374/2527-2179.bjvm001522. eCollection 2022.
Parasitic infections are common in sheep farming worldwide. A cross-sectional study was carried out to determine the prevalence and associated risk factors among gastrointestinal parasites and sheep herds from the Brazilian Pampa biome, Rio Grande do Sul state, Brazil. Twenty-one farms were visited, where rectal faecal samples were individually collected from 309 animals. The sheep industry on the studied farms was characterised by small farms with a low level of technification, an extensive grazing system and meat production. Of all samples analysed, strongyle nematodes had the highest prevalence (77.02%), followed by spp. (70.55%), (20.39%) and (17.48%). Mixed infection, between helminths and protozoans, was detected in 68.61% of samples. All herds were positive for strongyle and spp. A predominance of spp. and spp. nematodes was observed in the herds. Younger animals were significantly more affected by and . In the semi-intensive and intensive systems, a higher frequency of and strongyle infections was observed. Parasite infection was significantly reduced at low animal densities. The Brazilian Pampa region presents a high prevalence of gastrointestinal parasites among sheep; age, breeding system and stocking density were factors associated with parasite infection.
寄生虫感染在全球养羊业中很常见。在巴西南里奥格兰德州潘帕生物群落的绵羊群中开展了一项横断面研究，以确定胃肠道寄生虫的流行率及相关风险因素。研究人员走访了21个农场，从309只动物身上分别采集了直肠粪便样本。所研究农场的养羊业特点是农场规模小、技术化水平低、放牧系统粗放且以肉类生产为主。在所有分析样本中，圆线虫的流行率最高（77.02%），其次是 spp.（70.55%）、 （20.39%）和 （17.48%）。在68.61%的样本中检测到蠕虫和原生动物的混合感染。所有羊群的圆线虫和 spp.检测均呈阳性。在羊群中观察到 spp.和 spp.线虫占主导地位。幼龄动物受 和 的感染影响显著更大。在半集约化和集约化养殖系统中， 和圆线虫感染的频率更高。在低动物密度情况下，寄生虫感染显著减少。巴西南里奥格兰德州潘帕地区的绵羊胃肠道寄生虫流行率很高；年龄、养殖系统和饲养密度是与寄生虫感染相关的因素。
