DVM Trivia 2 — Questions and Answers
Question 1: Which animal has a unique dental formula that includes no upper incisors and instead has a dental pad?
- Horse
- Cow (Correct answer)
- Dog
- Cat
Correct answer: Cow
Cattle (ruminants) lack upper incisors and have a hard dental pad in their place, using a scooping motion to graze.
Question 2: What is the term for the inability of a mare to conceive despite normal estrus cycles?
- Anestrus
- Subfertility
- Repeat breeding (Correct answer)
- Anovulation
Correct answer: Repeat breeding
A 'repeat breeder' mare shows normal cycles but fails to conceive after three or more properly timed breeding attempts.
Question 3: Which species is known to have a bicornuate uterus with an extremely long uterine horn relative to its body size?
- Cow
- Dog
- Pig (Correct answer)
- Rabbit
Correct answer: Pig
Swine have very long uterine horns (up to 1.2 meters each) to accommodate their large litter sizes.
Question 4: What is the primary reservoir host for Francisella tularensis, the causative agent of tularemia?
- Deer
- Raccoon
- Rabbit (Correct answer)
- Fox
Correct answer: Rabbit
Rabbits (and hares) are the classic reservoir for Francisella tularensis, and hunters handling wild rabbits are at significant risk.
Question 5: In birds, which organ serves the equivalent function of a mammalian lymph node for B-cell maturation?
- Thymus
- Spleen
- Bursa of Fabricius (Correct answer)
- Bone marrow
Correct answer: Bursa of Fabricius
The bursa of Fabricius is a lymphoid organ unique to birds where B-lymphocytes mature; the 'B' in B-cell is named after it.
Question 6: Which toxin produced by Clostridium botulinum is most commonly associated with forage poisoning (shaker foal syndrome) in horses?
- Type A
- Type B (Correct answer)
- Type C
- Type D
Correct answer: Type B
Clostridium botulinum type B is the most common cause of equine botulism (shaker foal syndrome) in the eastern United States.
Question 7: A dog presents with 'rubber jaw' and renal secondary hyperparathyroidism. What is the underlying mechanism?
- Excess dietary calcium
- Reduced renal phosphorus excretion leading to hypocalcemia (Correct answer)
- Primary parathyroid adenoma
- Vitamin D toxicosis
Correct answer: Reduced renal phosphorus excretion leading to hypocalcemia
Chronic renal failure causes phosphorus retention and reduced calcitriol synthesis, leading to hypocalcemia and compensatory PTH secretion that demineralizes bone.
DVM Trivia 2
Which animal has a unique dental formula that includes no upper incisors and instead has a dental pad?