AAVSB Study Guide 2026
Everything you need to pass the AAVSB exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 AAVSB Exam Format at a Glance
📚 AAVSB Topics to Study (20)
✍️ Sample AAVSB Questions & Answers
1. A bovine blood sample shows packed cell volume (PCV) of 12% and plasma that appears pink. What does the pink plasma indicate?
Pink (hemolyzed) plasma combined with severe anemia points to intravascular hemolysis and free hemoglobin release into circulation.
2. On a thoracic radiograph of a cat, you identify an enlarged, 'valentine-shaped' heart on the dorsoventral (DV) view. This finding is most suggestive of which condition?
The classic 'valentine' shape of the feline heart on a DV or VD radiograph is caused by severe bi-atrial enlargement, which is a common finding in cats with hypertrophic cardiomyopathy (HCM). The prominent atria form the rounded lobes of the 'valentine'.
3. A veterinarian administers dexmedetomidine to a healthy adult horse for sedation prior to a standing procedure. Which of the following sets of physiological effects is most expected?
Alpha-2 agonists like dexmedetomidine cause peripheral vasoconstriction, leading to an initial hypertension, which triggers a reflex bradycardia. As the drug's central effects take hold, cardiac output can decrease, potentially leading to hypotension. These drugs are also well-known for significantly reducing gastrointestinal motility and secretions. They inhibit insulin release, which can cause hyperglycemia, and inhibit antidiuretic hormone (ADH), causing diuresis.
4. What is the significance of a sodium:potassium ratio below 27:1 in a dog?
A Na:K ratio below 27:1 is a classic screening indicator for Addison's disease, reflecting mineralocorticoid deficiency.
5. In the bitch, which phase of the estrous cycle is typically the longest and is characterized by uterine quiescence?
Anestrus is the longest phase in the bitch's reproductive cycle, lasting approximately 4–5 months and representing a period of reproductive inactivity between cycles.
6. Which zoonotic disease risk to veterinary staff is directly mitigated by pre-exposure rabies vaccination?
Pre-exposure rabies vaccination is recommended for veterinary personnel because of occupational exposure risk when handling potentially rabid animals.