NAVLE General Practice 4

Question 1

A 4-year-old ferret presents with muscle wasting, hindlimb weakness, and hypoglycemia (blood glucose 40 mg/dL) that resolves with dextrose. The most likely diagnosis is:

Accepted Answer

Insulinoma

Answer

Insulinoma is the most common pancreatic tumor in ferrets over 3 years old and classically causes fasting hypoglycemia, weakness, and neurological signs relieved by glucose administration.

Question 2

A dog presents with acute onset of right-sided head tilt, nystagmus with the fast phase to the left, and rolling. MRI is normal. The most likely diagnosis is:

Accepted Answer

Idiopathic vestibular syndrome

Answer

Idiopathic (geriatric) vestibular syndrome presents with acute severe peripheral vestibular signs and a normal MRI, and typically resolves spontaneously within 72 hours to 2 weeks.

Question 3

During a pre-purchase exam of a 5-year-old Quarter Horse, grade 3/5 left forelimb lameness is localized to the foot with a palmar digital nerve block. Radiographs reveal navicular bone erosions and synovial invaginations. The diagnosis is:

Accepted Answer

Navicular syndrome (palmar foot pain)

Answer

Navicular syndrome is characterized by palmar foot pain, positive response to palmar digital nerve block, and radiographic changes including synovial fossae and flexor cortex erosions of the navicular bone.

Question 4

A cat presents with open-mouth breathing, muffled heart sounds, and dull ventral lung sounds. Thoracocentesis yields chylous fluid. The most common underlying cause in cats is:

Accepted Answer

Idiopathic chylothorax

Answer

Idiopathic chylothorax is the most common cause in cats, though cardiac disease and neoplasia must be ruled out; true idiopathic cases have no identifiable underlying disorder.

Question 5

A goat kid presents at 2 days of age with failure to nurse, profuse watery diarrhea, and rapid dehydration. Feces are negative for Cryptosporidium and E. coli. Rotavirus ELISA is positive. Treatment priorities include:

Accepted Answer

Oral electrolyte fluid therapy and supportive care

Answer

Rotavirus diarrhea in neonatal ruminants is managed supportively with oral electrolyte replacement because the disease is viral and antibiotics are ineffective; correction of dehydration is paramount.

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE General Practice 4