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Can Vet J. 2016 October; 57(10): 1094.
PMCID: PMC5026152

Answers to Quiz Corner

  1. C) This is an FDA-approved treatment for scabies (Sarcoptes scabiei). A, Ivermectin, should be used very cautiously in collies; B, D, and E are not effective against the sarcoptiform mites.
  2. D) Masticatory muscle myositis is an immune-mediated disease affecting the muscles of mastication. It results in an inability to open the mouth due to atrophy of the muscles of mastication with severe temporal muscle atrophy. German shepherd dogs and other adult large-breed dogs are affected; the condition is treated with immunosuppressive doses of steroids. Craniomandibular osteopathy is a proliferative bone disease seen most often in immature West Highland white terriers and Scottish terriers. These patients present with intermittent fever, pain associated with attempting to eat, and pain when opening the mouth. They have excessive bone proliferation on the ventral aspect of the mandible and the base of the skull, resulting in an inability to open the mouth.
  3. A) The ACTH response test is the test of choice. Endogenous ACTH concentration is expected to be elevated with hypoadrenocorticism, but the finding is not specific to this condition.
  4. A) Clinical signs of colic include poor appetite, flank watching, distended abdomen, tachycardia, and pale mucous membranes. Getting up and down frequently, rolling, and posturing to urinate are also common signs of colic.
  5. B) Zearalenone, a mycotoxin found on some cereal grains (wheat, barley), has estrogenic effects and is known to cause these clinical problems in swine. Aflatoxin is hepatotoxic, fumonisin is hepatic and neurotoxic, deoxynivalenol is GI-toxic, and ergot causes abortions and peripheral gangrene.

Articles from The Canadian Veterinary Journal are provided here courtesy of Canadian Veterinary Medical Association