Veterinary advice should be sought before applying any treatment or vaccine.



Tapeworms (Anoplocephala perfoliata) are a type of internal parasite that invade the gastrointestinal tract of horses. Tapeworms are widespread throughout North America, using oribatid mites as their intermediate host which are found often in moist areas of horse pastures. Regions with dry arid climate have lower tapeworm populations. Tapeworms cause damage to the horse's intestinal lining when they produce small mucosal erosions at the site where they attach themselves in the horse's GI system. High levels of tapeworms have been found to cause impactions and spasmodic colic. Lesions associated with tapeworm attachment may also alter the pattern of intestinal motility, thus being a potential cause of intussusception.


Poor body condition
Recurring diarrhea
Progressive weight loss


  • Fecal egg count
  • Necropsy



Deworming : Praziquantel or a cestocidal (double the nematode dose) of pyrantel pamoate
. Given in the late fall or winter.
  • Isolate new animals upon arrival at the farm
  • Deworming through the implementation of a barnwide program.

Scientific Research

General Overviews

Risk Factors

  • Moist environmental conditions