The Influence of Region, Sex, and Age on the Prevalence of Gastrointestinal Parasites in Alpacas (Vicugna pacos) in Poland

The aim of the study was to determine the extent and intensity of gastrointestinal parasite infections in alpacas (<i>Vicugna pacos</i>) in Poland, considering factors such as region, gender, age, and season. The research was conducted on 29 herds located throughout Poland. Faecal samples from 512 alpacas were collected in autumn 2023 and spring 2024. Examination was performed using the direct flotation and McMaster methods. The average prevalence of gastrointestinal parasitic infections was 74.4%; 68.8% of alpacas were infected with nematodes and 34.8% with protists of the genus <i>Eimeria</i>. The most commonly detected parasites were <i>Nematodirus</i> spp. (38.5%) and <i>Eimeria punoensis</i> (18.2%). The analysis revealed significant differences in the intensity of gastrointestinal parasitic infections depending on region, age, gender, and season, suggesting the need to tailor deworming programs to the specific requirements of different groups of alpacas. Furthermore, regional differences in the prevalence of <i>Strongyloides</i> sp. and <i>Strongylida</i> infections were observed, indicating a significant impact of local environmental conditions and husbandry practices on the risk of infection. Seasonal variations in the intensity of <i>Eimeria</i> infections, particularly in autumn, were also noted. Parasitic infections in alpacas in Poland are common and generally asymptomatic. These results highlight the need for the implementation of a comprehensive preventive program for controlling parasitic infection, including regular diagnostics, pasture management optimization, maintenance of hygiene, and selective use of antiparasitic drugs in alpacas.