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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.
A study was conducted to determine the prevalence and intensity of tapeworm, roundworm and botfly larvae infection in horses from October 2005 to March 2006 on material taken from slaughterhouses. 262 horses: foals (n = 147) and adult horses of different ages (n = 115) originating from small farms in southern Poland were examined. Tapeworm Anoplocephala perfoliata occurred in 3.05% of the horses (average intensity - 13 specimens per host) as well in adult horses (mares, geldings, stallions) (2.6%) and in foals (3.4%). Roundworm Parascaris equorum was found in 13.4% horses, with a mean intensity - 72 specimens per host. Roundworm occurred mainly in foals - 21.1% and in 4 adult horses (3.5%) including 3 mares (5.1%) and 1 stallion (4.3%). Larvae of Gasterophilus intestinalis botflies were found in 3.4% horses, with a mean intensity of infection - 56 specimens per host. Botfly larvae occurred in 3 adult horses (mares) (2.6%) and in 6 foals (4%), with a similar intensity of infection, respectively: 65 and 51. The study revealed that management systems considerably affect these parasite infections. Horses examined in this study came from small farms, where they had a limited access to pasture or were kept in a housed system. Thus, there was a smaller risk of Anoplocephalidosis and Gasterophilosis in particular, which is associated with large herd breeding and the pasture system. On the other hand, the housed system was advantageous to roundworm infections because of the conditions in the stable which generally stimulate development of these nematode eggs up to the infective stage.
The aim of this study was to determine the prevalence of intestinal parasites in foals from large stud farms during the first year of their life. Between the years 2005 and 2008, a total of 516 foals (211 Pure Blood Arabian [OO] and 305 Thoroughbred [XX]) from big herd farms were examined in order to determine the level of infection with intestinal parasites. Using the McMaster method with centrifugation foals in age groups: 1-3, 4-6, 7-9 and 10-12-months-old were checked. To differentiate the strongyles (Strongylidae) larvae, the fecal cultures were done according to Henriksen and Korsholme. On the basis on the results the following parasites were found during the fecal examination: protozoan Eimeria leuckarti and nematodes: Strongyloides westerii, Parascaris equorum and Strongylidae. Only the presence of cyathostomins (Cyathostominae) were demonstrated. The infection with Eimeria leuckarti and Strongyloides westerii was greater among XX foals, whereas OO foals were more infected with Parascaris equorum and Cyathostominae. Among all infected horses, the mono-infections were dominant (69.9%). The type as well as the level of infection with the observed parasites depended on the age of the animal. The infection with Eimeria leuckarti and Strongyloides westerii was the highest among the youngest foals (up to 3rd month). However, in the case of protozoan, the level of infection decreased with age and the infection with whipworm was low in the entire period of research. Despite regular deworming, a high prevalence of infection with Parascaris equorum and Cyathostominae was observed and it grew with the animals’ age, reaching 26.3% and 43.9% among 10-12-month-old foals, respectively.
Background. The objective of this study was to evaluate the level of roundworm infection in working horses slaughtered for meat. In these horses anthelmintics had not been used. Material and methods. Roundworms were collected post-mortem from small intestines of 83 horses. Results. The mean prevalence of roundworm infection was 12% and intensity 46.7 specimens per horse. Infection was found only in foals; 10 animals were infected (45.4%) among the 22 examined. Due to common occurrence of roundworms (Parascaris equorum) in foals this nematode control should focus particularly on regular anthelmintic treatment of young horses, providing proper hygienic conditions for them and checking the infection level by coproscopical methods.
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