Equine parasitology

This Equine parasites for the VT students of 2008 to study from for their finials. It was taken strait from the test that we had in class. I hope that it helps out a little bit just to be able to do the test over and over again and not just reading it.

So how did you do on this section? I hope you did better then you thought that you would do. I know that it is helping me by doing this, since when I took one of the other test I got a good score on it and I will be trying them again later.

Created by: xandie

  1. Gastrophilus spp. are maggots that live in the stomach of the horse. This parasite is commonly called the horse bot.
  2. The adult fly of the parasite in question #1 bites the horse with its piercing mouthparts.
  3. The larval form of the parasite in question #1 migrates extensively in the horse
  4. Larvae of horse bots are diagnosed on fecal floatation tests. These larvae cause a great deal of stomach pain even with light burdens. Severe diarrhea may result.
  5. Yellow or cream colored eggs from the parasite in question #1 are seen attached to the horse's hair.
  6. Habronema sp. may cause an open lesion that is called a summer sore or jack sore.
  7. Habronema has a direct life cycle and uses no intermediate host.
  8. Habronema larvea are passed in the feces and don't float well on fecal tests.
  9. Strongyloides westeri lives in the small intestine on the horse. Only female worms are parasitic.
  10. Strongyloides sp. can pass via transmammary, percutaneous (through the skin), and oral routes. Strongyloides is a parasite of confined horses and is mainly seen in the young.
  11. Trichostrongylus axei is a very common parasite of horses and is probably the same parasite that was covered in the ruminant section. It has a Typical Strongyle Ova.
  12. The largest common nematode parasite of the horse in the USA has 3 lips. It is very successful and is seen more frequently in the young horse. It lives in the small intestine. It is and Ascarid and its name is Parascaris equorum.
  13. The parasite in question #12 is only 1/2 inch long.
  14. The parasite in question #12 uses an hepato-tracheal migration and commonly causes severe liver disease and lung disease.
  15. Foals often appear pot-bellied, have rough hair coasts, may have diarrhea, may show CNS sings, and my colic with infections of the parasite in question #12.
  16. Many anthelminthics are effective in treating the parasite in question #12, but pasture and paddock management must be utilized as well.
  17. Eggs of the parasite in question #12 are fragile in the environment.
  18. Strongylus spp. are called blood worms or large strongyles in the horse.
  19. The parasites in question #18 cause very little pathology.
  20. The parasites in question #18 don't migrate except in the bowel wall.
  21. The parasites in question #18 may cause occlusion of the artery that supplies a section of the bowel. This may cause a spasm that results in spastic colic.
  22. All new wormers kill the parasite in question #18 in all its stages and it is easily controlled in the environment.
  23. The parasite in question #18 is not a hookworm and has a small buccal capsule.
  24. Small strongyles may be of many geni and cause high EPG counts. They can cause anemia if present in large numbers. They migrate only in the wall of the bowel and are of relatively small size as adults.
  25. The parasites in question #18 and 24 pass Typical Strongyle Ova in the feces.
  26. Oxyuris equi is the horse pinworm.
  27. The parasite in question #26 causes diarrhea and weight loss.
  28. A unique test using scotch tape is the best test for diagnosing this parasite.
  29. Dictyocaulus arnfeldi, the horse lungworm, is an common equine parasite and its larvae may be commonly floated on fecal floats.
  30. The horse tapeworms, Paranoplacephala and Anaplocephala are not very pathogenic at light levels of parasitism.
  31. The parasites in question #30 have an indirect life cycle.
  32. Babesia occurs in Florida and uses a tick as its intermediate host.
  33. Coccidiosis is an common clinical disease in foals.
  34. The horse evolved to be confined in small pastures.
  35. The fecal test for large animal fecals that we use in class is a ____________ test. It uses ____________ as its sale.
  36. The ova counted in the test is question #35 are multiplied by ________ to achieve the EPG. The term EPG means Eggs Per Gram.
  37. Setaria equi is a very pathogenic parasite.

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