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Journal of Parasitology Research
Volume 2009 (2009), Article ID 616173, 5 pages
Research Article

Intrinsic Factors Influencing the Infection by Helminth Parasites in Horses under an Oceanic Climate Area (NW Spain)

1Animal Pathology Department, Epidemiology, Zoonoses and Parasitic Diseases, Veterinary Faculty, University of Santiago de Compostela, 27002-Lugo, Spain
2Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Animal Health Division, Avda. Montaña, 930 50059 Zaragoza, Spain

Received 9 January 2009; Accepted 4 March 2009

Academic Editor: Benjamin M. Rosenthal

Copyright © 2009 I. Francisco et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A coprological survey to determine the influence of some intrinsic factors (breed, age, and sex) on the infection by helminth parasites in equine livestock ( ) under an oceanic climate area (NW Spain) was conducted. Faecal samples were individually collected and analyzed by the coprological techniques. The main strongylid genera identified were Trichonema and Cyalocephalus spp (small strongyles) and Strongylus and Triodontophorus (large strongyles). The prevalence of gastrointestinal nematode was 89% (95% CI 86, 92) and 1% cestoda (0, 2). The percentage of horses with strongyloid parasites was 89% (86, 92), 11% (8, 14) for Parascaris, and 3% (1, 5) for Oxyuris. The highest prevalence for ascariosis was observed in the youngest horses (<3 years), for oxyurosis in the >10 years animals, and for strongylosis in the 3–10 years ones. Females were significantly more parasitized than males. A negative correlation between the age and the egg-excretion of ascarids and strongyles was recorded. The autochthonous and the English Pure Blood horses were the most parasitized. We concluded that the infections by helminths, especially the strongyloids, are significantly common in the region, so that greater importance should be given to this situation.