Parasite Control Programs - Mission Equine Associates
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Parasite Control Programs

Internal Parasite Control And Your Horse

Internal parasite control is an important part of equine healthcare.  Parasitism from Large Strongyles was once a leading cause of acute severe colic in horses.  Internal parasites can cause a number of health problems in horses ranging from mild to severe.  They can lead to the malabsorption of protein and micro nutrients from the bowel and lead to decreased resistance to secondary diseases.  Severe parasitism can lead to permanent damage to the bowel in some cases.

When outward signs of parasitism exist they may include:

  • Dull rough hair coat
  • Reduced growth
  • Lethargy
  • Pot belly appearance
  • Decreased stamina or poor performance
  • Colic
  • Weight loss
  • Diarrhea

There are over 150 species of internal parasites that can infect horses.  The most commonly associated parasites include:

  • Large Srongyles
  • Small Stronglyes
  • Roundworms or ascarids
  • Tapeworms
  • Pinworms
  • Bots or stomach worms
  • Threadworms

Rotational Deworming Routine:

  • Rotate an Avermectin product (ivermectin or moxidectin) and Pyratal every 8 weeks
  • At least once yearly use a product combined with Praziquantal for tapeworms
  • Deworm foals within 24 hours of foaling to prevent transmission to the foal
  • Begin deworming foals at 6 weeks of age
  • Never use Moxidectin (quest) in horses under 1 year of age

Continuous Deworming Routine:

  • Use Strongid C daily year around
  • Administer an avermectin product every 6 months