Question 12 / 30:  Canine dysautonomia is a rare condition in dogs associated with degeneration of autonomic nervous system. What is the best way to diagnose this disease?
A  Run a myasthenia gravis antibody titer test
B  Fecal exam and urinalysis since these dogs have diarrhea and dysuria
C  Barium contrast study radiograph
D  Schmirmer tear test and pharmacologic testing of the pupils (i.e. provocative ocular test using
Pilocarpine) to determine mydriasis
E  Run a thyroid panel
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Explanation:

Dilute pilocarpine (0.05% ophthalmic solution) results in rapid pupillary constriction in dogs with dysautonomia because of supersensitivity of the denervated muscle to cholinergic drugs. The prognosis is grave.

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