Occurrence of gastrointestinal parasitic diseases of swine in different production phases in commercial pig farms from the State of Santa Catarina, southern Brazil

ABSTRACT Gastrointestinal parasites are important, since they can cause a decrese in the performance of swine. The occurrence of parasites in pig farms can create economic losses such as reduction in the value of carcasses and increasing expenses with medicines and veterinary assistance. This study aimed at investigating the occurrence of intestinal parasites in different phases of production reared pigs in intensive prodution systems in the western region of the State of Santa Catarina. A total of 403 fecal samples were analyzed, of which 51.86% were positive for one or more parasites in different phases of production. Finishing pigs had the highest prevalence of parasites (60.19%) followed by nursery pigs (55.44%), pigs in breading sows (50.49%), and suckling piglets (40.81%). Strongylida parasites had higher occurrence (28.78%), and were also the most frequent in the finishing, breading sows, and nursery phases. Coccidia were more occurrent in suckling piglets. This study highlights the need of implementing suitable antiparasitic control measures in all phases of swine production associated with a surveillance system for the diagnosis of endoparasite infection in pigs. Our results demonstrate that endoparasites are highly occurring in pigs, even in intensive system animals on technified farms.

摘要：胃肠道寄生虫是危害生猪养殖的重要病原，其感染可导致生猪生产性能下降，进而造成经济损失，具体表现为胴体价值降低、兽药与兽医诊疗开支增加。本研究针对圣卡塔琳娜州（Santa Catarina）西部地区集约化养殖系统中不同生产阶段的生猪，开展肠道寄生虫感染情况调查。本次研究共分析403份粪便样本，其中51.86%的样本在不同生产阶段检出一种或多种寄生虫感染。各生产阶段的寄生虫感染率依次为：育肥猪60.19%、保育猪55.44%、种母猪群50.49%、哺乳仔猪40.81%，育肥猪感染率最高。圆线虫目（Strongylida）寄生虫的总体检出率达28.78%，为最常见的寄生虫类群，同时也是育肥猪、种母猪群与保育猪群中的优势流行类群。球虫（Coccidia）则在哺乳仔猪中检出率最高。本研究强调，需在生猪生产全阶段实施针对性的抗寄生虫防控措施，并配套建立猪体内寄生虫（endoparasite）感染诊断监测体系。研究结果显示，即便在技术化集约化养殖场的生猪群中，体内寄生虫感染仍处于较高流行水平。