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Faecal egg counts were performed in 187 foals of a large Polish stud farm between February and September 2007. Eggs of Parascaris equorum were present in faeces of 7% and those of cyathostomins in 13% of the foals aged less than 194 days. Information dealing with age of foals and/or efficiency of ivermectin treatment as well as the nematode parasite prepatent periods, it can be conducted that most of the infections recorded on the basis of faecal egg counts were false-infections in animals up to the age of six months, probably due to the ingestion of infected faeces of their dam or some other horses.
The aim of the study was to evaluate the composition of the cyathostomin species (Cyathostominae) in horses kept in the housed-pasture system. Specimens were collected in 2009 from the feces of 14 horses after treatment with Grovermina (1% ivermectin). Among 21,371 specimens collected, 19 species of cyathostomins were found. The most abundant genera were Cyathostomum, Cylicostephanus and Cylicocyclus, which constituted 93.56% of the total Cyathostominae community. Cylicocyclus brevicapsulatus was found for the first time in Poland.
A survey to determine current prevalence and intensity of bot fly (Gasterophilus spp). infection in horses at necropsy was conducted on material taken from a slaughterhouse in S³omniki near Krakow from January to April 2005. 83 untreated horses: one-year old foals (n=22) and adult horses (n=61) from small farms from southern Poland were examined. Third level instars of Gasterophilus intestinalis were found in the stomachs of 7 horses (8.4%), and the intensity of infection was from 1 to 180 larvae (a mean of 69.7). Parasites were found in 6 of the 58 mares (10.3%) and 1 of the 25 stallions (and geldings) (4.0%). Foals were not infected. Gasterophilosis in horses from small farms kept mainly under houses system or limited pasture occurs quite rarely.
The objective of this study was to evaluate the level of tapeworm infections based on fecal sample examinations (McMaster method) in Arabian horses from two stud farms and post-mortem investigations in horses slaughtered for meat from small farms. The mean seasonal prevalence of tapeworm infection based on fecal sample examinations was 7.0% and 4.1% in the two stud farms. Tapeworm eggs were found more often in 2-year-old horses and mares than in yearlings, while they were not found in housed stallions. The prevalence of the infection was highest in April (9.3%) in one stud farm and in October (8.5%) in the second. Based on post-mortem examinations, A. perfoliata were found in 6 (7.2%) among 83 examined horses. A mean intensity of infection was 71.2 specimens, with a maximum 367 specimens found. Infection was revealed in 5.2% of mares and 12% of geldings and stallions as well as in one foal (4.5%). The average annual prevalence of tapeworm infections of horses from stud farms based on fecal sample examinations was small, from 4.1% to 7.0%. The dynamic of tapeworm infections of horses from stud farms was different during the pasture season. The mean prevalence of tapeworm infections of horses from individual breeding systems based on necropsy was similar: 7.2%.
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