NAVLE General Practice 5

Question 1

A 3-year-old Labrador Retriever ingested approximately 6 mg/kg of acetaminophen 2 hours ago. It is asymptomatic. What is the most appropriate treatment?

Accepted Answer

N-acetylcysteine and supportive care

Answer

N-acetylcysteine replenishes glutathione stores and is the antidote for acetaminophen toxicity; it should be combined with supportive care even in an asymptomatic patient presenting within 4 hours of ingestion.

Question 2

A 6-year-old indoor-outdoor cat presents with a 2 cm subcutaneous mass over the interscapular region that appeared 3 months after vaccination. Histopathology shows a high-grade spindle cell tumor with inflammation at the periphery. The diagnosis is:

Accepted Answer

Feline injection-site sarcoma (FISS)

Answer

Feline injection-site sarcoma is an aggressive high-grade spindle cell tumor arising at vaccination or injection sites, characterized by peripheral inflammation and a high recurrence rate after excision.

Question 3

An alpaca presents with progressive weight loss, bottle jaw, and anemia. Fecal flotation reveals strongyle-type eggs. Which anthelmintic class is most commonly used as first-line therapy in camelids with suspected Haemonchus?

Accepted Answer

Macrocyclic lactones (e.g., ivermectin)

Answer

Macrocyclic lactones such as ivermectin are commonly used first-line in camelids for Haemonchus contortus, though resistance monitoring via fecal egg count reduction tests is recommended.

Question 4

A 5-year-old dog presents with peracute collapse, pale mucous membranes, and abdominal distension. FAST ultrasound reveals free abdominal fluid and a splenic mass. PCV is 18%. Which statement is most accurate regarding the splenic mass?

Accepted Answer

Approximately 50% of splenic masses in dogs are malignant (hemangiosarcoma)

Answer

In dogs with splenic masses and hemoabdomen, approximately 50% are hemangiosarcoma (malignant), 25% are other malignancies, and only 25% are benign nodular hyperplasia or hematoma.

Question 5

A 10-day-old foal presents with hypopyon, corneal vascularization, and joint effusion in the right tarsus. The most likely underlying cause is:

Accepted Answer

Failure of passive transfer leading to septicemia

Answer

Septicemia secondary to failure of passive transfer is the leading cause of uveitis and septic arthritis in neonatal foals, as bacteria seed synovial and ocular tissues hematogenously.

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE - North American Veterinary Licensing Examination Practice Test

NAVLE General Practice 5