Prevalencia de Nematodos Gastrointestinales en Sistemas de Producción Ovina y Caprina bajo Confinamiento, Semiconfinamiento y Pastoreo en Municipios de Antioquia, Colombia

The aim of this study was to determine the prevalence of gastrointestinal nematodes in sheep and goat production systems in the tropics of Antioquia, Colombia through a cross-sectional study. Faecal samples were collected from 302 sheep and goats from 17 farms in 9 municipalities. The prevalence of nematode infection and the parasite burden based on species and genus identified through taxonomic characterization of infective third-stage larvae (L3) and considering clinical and epidemiological variables were evaluated. The prevalence of infected ruminants was 76%, where 69.5% showed low parasite burden (less than 200 epg of faeces). It is concluded that ovine and caprine farms in Antioquia had high prevalence of Trichostrongylids infection, where Haemonchus contortus (61.3%), Teladorsagia (Ostertagia) circumcincta (25.5%) and Trichostrongylus sp (21.5%) were the most common parasites.