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Topic:Strongyles
Strongyles are parasitic nematodes that commonly infect horses, residing primarily in the large intestine. They are classified into two groups: large strongyles (Strongylus spp.) and small strongyles (cyathostomins). These parasites are a significant concern in equine health due to their potential to cause gastrointestinal disturbances. Large strongyles can lead to severe damage by migrating through the horse's tissues during their life cycle, whereas small strongyles remain within the intestinal lining and can cause inflammation and colic. Diagnosis and management of strongyle infections involve fecal egg counts and strategic deworming programs. This page compiles peer-reviewed research studies and scholarly articles that explore the biology, epidemiology, and control strategies of strongyles in horses.
Prevalence of large endoparasites at necropsy in horses infected with Population B small strongyles in a herd established in Kentucky in 1966. Two closed horse herds (Old Lot 4 and Field 24), infected since 1966 with Population B small strongyles resistant to thiabendazole (TBZ) and phenothiazine (PTZ), were terminated in February, March, and May, 2005. At necropsy, only the large endoparasites were identified and counted. The number of horses on pasture was 14 (239 days of age to 23 years old) for Old Lot 4 and two (3 to 20 years old) for Field 24. The time of the last antiparasitic treatment, relative to the year (2005) of necropsy, was 26 years for Old Lot 4 and 9 years for Field 24 horses. Gasterophilus intestinalis third instars...
A retrospective study of the prevalence in equine postmortems of cranial mesenteric arteritis caused by Strongylus vulgaris in Alberta (2010 to 2022). is one of the most pathogenic nematodes affecting equids. Larval migration through the cranial mesenteric artery (CMA) with attendant arteritis and thromboembolism can result in fatal non-strangulating intestinal infarction. Once considered a historical disease, recent studies have described the reemergence of this pathogen in several European countries; however, little is known of the current prevalence of in the Canadian horse population. Unassigned: To determine the prevalence of active cranial mesenteric arteritis in horses submitted for postmortem examination to the Diagnostic Services...
