Strongyles of Horses


The intestinal strongyles of horses are members of the superfamily Strongyloidea and the family Strongylidae.

Members of the family are abundant in equines, including horses and donkeys, but are also found in diverse hosts including elephants, ostriches, rhinoceros, tapirs, tortoises, warthogs and marsupials in Australia.

The strongylidae are further divided into two subfamilies, the Strongylinae ( the large strongyles) and the cythostominae ( the small strongyles) as shown in the table below.

 

Superfamily

Family Subfamily Genus
- examples
Strongyloidea Strongylidae Strongylinae
(large strongyles)
Strongylus
Triodontophorus
Cyathostominae
(small strongyles)
Cyathostomum
Cylicostephanus
Cylicocyclus
Cylicodontophorus
Poteriostomum
Gyalocephalus

 

The strongylinae are commonly called the "large strongyles"  because of their larger size relative to the cyathostominae which in turn are called the "small strongyles".  Both groups are among the most important nematodes of domestic equines throughout the world because of their high degree of pathogenicity and they are certainly so in North America.

 

    

 

Parasites and Parasitic Diseases of Domestic Animals
Dr. Colin Johnstone (principal author)
Copyright 1998 University of Pennsylvania
This page was last modified on January 24, 2000