Free NAVLE Exam MCQ Question and Answers

Question 1

Following a bilateral thyroidectomy, a 11-year-old female domestic shorthair cat is released from the hospital. The patient is reevaluated two days later due to panting, agitation, and a recent seizure. Which postoperative complication is most likely to account for these clinical symptoms?

Accepted Answer

Hypoparathyroidism

Answer

Bilateral thyroidectomy in cats often involves inadvertent removal or damage to the parathyroid glands, which are closely associated with the thyroid. The parathyroid glands regulate calcium levels via PTH. Postoperative hypoparathyroidism leads to hypocalcemia, causing increased neuromuscular excitability that manifests as panting, agitation, and seizures, making it the most likely complication.

Question 2

A dog that has been struck by a car typically has non-weight-bearing foreleg lameness. Physical examination reveals no fractures that can be felt. Without any movement or pain, the limb simply hangs there. It is also discovered that the dog has Horner's syndrome. What medical condition is most likely to account for these exam results?

Accepted Answer

Brachial plexus avulsion

Answer

The combination of non-weight-bearing foreleg lameness, a flaccid limb that 'just hangs there,' and the presence of Horner's syndrome is highly indicative of a brachial plexus avulsion. Horner's syndrome (miosis, ptosis, enophthalmos) occurs due to damage to sympathetic nerve fibers within the brachial plexus. The flaccid paralysis results from severe nerve root damage, typically from a traumatic pull on the limb.

Question 3

In llamas, the most typical source of bony facial tumors is

Accepted Answer

Tooth root abscess

Answer

In llamas, tooth root abscesses are a very common cause of bony facial tumors or swellings. The infection and inflammation associated with an abscess can lead to significant osteomyelitis and reactive bone proliferation in the surrounding facial bones. This presents as a firm, bony mass, making tooth root abscesses the most frequent etiology for such lesions in this species.

Question 4

After falling from a 25-foot cliff, a 6-year-old corgi develops opisthotonus, thoracic limb hyperextension, and rear limb paraplegia. Which of the following is the lesion's most likely location?

Accepted Answer

T3-L3

Answer

Opisthotonus, thoracic limb hyperextension (Schiff-Sherrington posture), and rear limb paraplegia are classic signs of a severe spinal cord lesion in the thoracolumbar region (T3-L3). The Schiff-Sherrington posture indicates a lesion between T3 and L3, which disinhibits the extensor muscles of the thoracic limbs, while the paraplegia points to the primary lesion affecting the spinal cord segments controlling the hind limbs.

Question 5

Which of the following organisms is most frequently present in feline pyometra?

Accepted Answer

Escherichia coli

Answer

Escherichia coli (E. coli) is by far the most common bacterial isolate found in cases of feline pyometra, as well as canine pyometra. This bacterium typically ascends from the lower reproductive tract or urinary tract into the uterus, especially under the influence of progesterone, which makes the uterus more susceptible to infection.

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE - North American Veterinary Licensing Examination Practice Test

Free NAVLE Exam MCQ Question and Answers