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The effect was studied of the M. expansa homogenate administered with Freund’s complete adjuvant and Propionibacterium granulosum - on the humoral response of lambs spontaneously infected with Moniezia sp. Statistically significant increase in precipitating, complement fixing and haemagglutinating antibodies was observed in lambs immunized with homogenate injected with Freund’s adjuvant. Limitation of prevalence of infection observed in immunized animals was not statistically significant.
The aim of the study was to determine the level of gastro-intestinal parasite infections in sheep farmed organically (herd E, 30 ewes) and kept conventionally (in two conventional sheep operations), in total confinement (herd K1, 16 ewes) or under a pasture system (herd K2, 25 ewes). Every month during the grazing season coproscopic examinations by the McMaster method were conducted, making a total of 455 fecal samples analyzed, and at the end of the season diagnostic sections of the entire gastro-intestinal tracts from 18 sheep (6 ewes from each of the sampled flocks) were performed. The intensity of infection with coccidia, and especially with pathogenic species of gastrointestinal nematodes (i.e. Haemonchus contortus, Teladorsagia circumcincta, Trichostrongylus vitrinus) was much higher in sheep from the organic farm, compared to two farms conventionally managed. Meanwhile, in the conventional farm with grazing animals (herd K2) Nematodirus battus – a highly pathogenic, foreign species of nematode was found – and the herd was also largely infected with the tapeworms of Moniezia genus. A higher level of helminth infections and especially much greater species diversity of gastrointestinal nematodes observed in grazing sheep indicate a substantial role of pasture in the formation of parasitic clusters. In pasture management, alongside the biology and pathogenesis of parasites the use of proper preventive measures is most important.
Parasite invasions are one of the main diagnosed pathologies of European bison. Since the severity and parasite species composition varies depending on the season, parasitological monitoring and deworming of European bison and evaluation of its effectiveness is important in the breeding of European bison. For that reason, parasitological evaluation based on coproscopical methods of live animals was performed. Full parasitological examinations of the digestive system together with necropsies were performed post-mortally. The obtained data enabled the selection of a suitable deworming treatment. The results showed that the parasite species composition in the fenced European bison breeding center was similar to the situation observed in free ranging European bison. The invasion of a blood sucking nematode Ashworthius sidemi was confirmed in European bison closed breeding for the first time. None of the European bison showed any clinical symptoms caused by parasitic factors. The research proved that from the clinical point of view the deworming process is more crucial in the spring, because of increased intensity and extensiveness of invasions during this time and the possibility for the use of chemotherapeutics with a broader spectrum of treatment.
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