NORTH AMERICAN VETERINARY
LICENSING EXAMINATION (NAVLE)
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A | INSTANT DOWNLOAD PDF
1. Which organism is the most common cause of bovine mastitis worldwide?
A. Mycoplasma bovis
B. Escherichia coli
C. Staphylococcus aureus
D. Streptococcus equi
Answer: C
Rationale: Staphylococcus aureus is a contagious mastitis pathogen that
spreads during milking and is a leading cause of chronic mastitis in dairy
herds.
2. The primary site of absorption for vitamin B12 in dogs is the:
A. Duodenum
B. Jejunum
C. Ileum
D. Colon
Answer: C
Rationale: Vitamin B12 absorption occurs in the ileum and requires
intrinsic factor in dogs.
3. Which vaccine is considered a core vaccine for cats?
A. Feline leukemia virus
B. Bordetella bronchiseptica
, C. Feline panleukopenia
D. Chlamydia felis
Answer: C
Rationale: Feline panleukopenia is a core vaccine due to its severity, high
mortality, and widespread distribution.
4. A cow with hypocalcemia is most likely to show which clinical sign?
A. Hyperexcitability
B. Muscle weakness and recumbency
C. Severe diarrhea
D. Polyuria
Answer: B
Rationale: Hypocalcemia (milk fever) causes decreased neuromuscular
function leading to weakness and recumbency.
5. The primary vector for transmission of Lyme disease in dogs is:
A. Fleas
B. Mosquitoes
C. Lice
D. Ixodes ticks
Answer: D
Rationale: Lyme disease is transmitted by Ixodes species ticks, particularly
Ixodes scapularis.
6. Which anesthetic agent provides dissociative anesthesia in veterinary
patients?
A. Propofol
B. Isoflurane
C. Ketamine
D. Acepromazine
Answer: C
Rationale: Ketamine induces dissociative anesthesia by blocking NMDA
receptors.
, 7. The normal gestation length of a mare is approximately:
A. 280 days
B. 300 days
C. 340 days
D. 390 days
Answer: C
Rationale: Average equine gestation is about 340 days, though it can vary.
8. Which parasite causes heartworm disease in dogs?
A. Toxocara canis
B. Dipylidium caninum
C. Dirofilaria immitis
D. Ancylostoma caninum
Answer: C
Rationale: Dirofilaria immitis resides in pulmonary arteries and the heart,
causing heartworm disease.
9. The primary site of ammonia detoxification in mammals is the:
A. Kidney
B. Lung
C. Spleen
D. Liver
Answer: D
Rationale: The liver converts ammonia to urea via the urea cycle.
10.Which disease is characterized by progressive weight loss despite good
appetite in cats?
A. Diabetes mellitus
B. Hyperthyroidism
C. Chronic kidney disease
D. Feline infectious peritonitis
Answer: B
Rationale: Hyperthyroidism increases metabolic rate, causing weight loss
with polyphagia.
LICENSING EXAMINATION (NAVLE)
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A | INSTANT DOWNLOAD PDF
1. Which organism is the most common cause of bovine mastitis worldwide?
A. Mycoplasma bovis
B. Escherichia coli
C. Staphylococcus aureus
D. Streptococcus equi
Answer: C
Rationale: Staphylococcus aureus is a contagious mastitis pathogen that
spreads during milking and is a leading cause of chronic mastitis in dairy
herds.
2. The primary site of absorption for vitamin B12 in dogs is the:
A. Duodenum
B. Jejunum
C. Ileum
D. Colon
Answer: C
Rationale: Vitamin B12 absorption occurs in the ileum and requires
intrinsic factor in dogs.
3. Which vaccine is considered a core vaccine for cats?
A. Feline leukemia virus
B. Bordetella bronchiseptica
, C. Feline panleukopenia
D. Chlamydia felis
Answer: C
Rationale: Feline panleukopenia is a core vaccine due to its severity, high
mortality, and widespread distribution.
4. A cow with hypocalcemia is most likely to show which clinical sign?
A. Hyperexcitability
B. Muscle weakness and recumbency
C. Severe diarrhea
D. Polyuria
Answer: B
Rationale: Hypocalcemia (milk fever) causes decreased neuromuscular
function leading to weakness and recumbency.
5. The primary vector for transmission of Lyme disease in dogs is:
A. Fleas
B. Mosquitoes
C. Lice
D. Ixodes ticks
Answer: D
Rationale: Lyme disease is transmitted by Ixodes species ticks, particularly
Ixodes scapularis.
6. Which anesthetic agent provides dissociative anesthesia in veterinary
patients?
A. Propofol
B. Isoflurane
C. Ketamine
D. Acepromazine
Answer: C
Rationale: Ketamine induces dissociative anesthesia by blocking NMDA
receptors.
, 7. The normal gestation length of a mare is approximately:
A. 280 days
B. 300 days
C. 340 days
D. 390 days
Answer: C
Rationale: Average equine gestation is about 340 days, though it can vary.
8. Which parasite causes heartworm disease in dogs?
A. Toxocara canis
B. Dipylidium caninum
C. Dirofilaria immitis
D. Ancylostoma caninum
Answer: C
Rationale: Dirofilaria immitis resides in pulmonary arteries and the heart,
causing heartworm disease.
9. The primary site of ammonia detoxification in mammals is the:
A. Kidney
B. Lung
C. Spleen
D. Liver
Answer: D
Rationale: The liver converts ammonia to urea via the urea cycle.
10.Which disease is characterized by progressive weight loss despite good
appetite in cats?
A. Diabetes mellitus
B. Hyperthyroidism
C. Chronic kidney disease
D. Feline infectious peritonitis
Answer: B
Rationale: Hyperthyroidism increases metabolic rate, causing weight loss
with polyphagia.
