NAVLE ACTUAL EXAM EXAM BANK 2025/2026 | ACCURATE
CURRENTLY TESTING AND FREQUENTLY TESTED EXAM
QUESTIONS AND ANSWERS | EXPERT VERIFIED FOR
GUARANTEED PASS | LATEST UPDATE | STUDY GUIDE
INCLUSIVE | STUDY NOTES TOO
1. What nerve(s) need to be blocked in order to dehorn cattle?
A. Auriculotemporal nerve
B. Cornual nerve
C. Infraorbital nerve
D. Infratrochlear nerve
Correct Answer: B. Cornual nerve
Rationale: The cornual nerve, a branch of the zygomaticotemporal nerve, provides sensory
innervation to the horn and surrounding skin in cattle. Blocking it with local anesthetic
desensitizes the horn region for dehorning.
2. What nerve(s) need to be blocked in order to dehorn goats?
A. Cornual nerve only
B. Cornual and auriculotemporal nerves
C. Cornual and infratrochlear nerves
D. Cornual and infraorbital nerves
Correct Answer: C. Cornual and infratrochlear nerves
Rationale: Goats require a block of both the cornual branch of the zygomaticotemporal nerve
and the cornual branch of the infratrochlear nerve because innervation to the horn comes from
two different sources.
3. Several rabbits in a commercial meat operation have developed genital scabs, perineal
ulcerations, and crusty exudate around the nose and eyes. Microhemagglutination tests are
positive for treponematosis. Which treatment is most effective?
1
,A. Amprolium-medicated feed for 2 weeks; increase ventilation
B. Clindamycin PO for exposed rabbits; cull affected animals
C. Ampicillin PO for affected rabbits 10–14 days
D. Isolate affected animals; Lincomycin in water 2–3 weeks
E. Penicillin IM for all rabbits 5–7 days
Correct Answer: E. Penicillin IM for all rabbits 5–7 days
Rationale: Rabbit syphilis (Treponema cuniculi) is effectively treated with injectable penicillin.
Oral antibiotics are ineffective due to gut flora disturbances. Isolation and culling are not curative
strategies.
4. Two bucket-fed veal calves are depressed, stunted, and have sticky feces. Rumen contents
smell rancid with pH 5.2. What is the most appropriate treatment?
A. Cull affected calves
B. Remove fermented rumen contents, flush with saline
C. Wean affected calves and bottle feed healthy calves
D. Vitamin E/Selenium injections
E. Inoculate rumen fluid from a healthy cow into calf
Correct Answer: B. Remove fermented rumen contents, flush with saline
Rationale: This is ruminal drinking syndrome, caused by failure of the reticular groove reflex,
allowing milk into the rumen. Fermented contents must be removed and the rumen flushed.
Weaning may help prevent recurrence, but immediate treatment is lavage.
5. Abortions due to brucellosis in cattle typically occur at what stage of pregnancy?
A. First trimester
B. Second trimester
C. Early gestation only
D. Last half of pregnancy
E. Peripartum only
Correct Answer: D. Last half of pregnancy
Rationale: Brucellosis usually causes abortion in the last half of gestation (5th month onward),
2
,often with stillborn calves. This distinguishes it from some other infectious causes of abortion. It
is a reportable disease.
6. A cow presents with urea/non-protein nitrogen toxicity. What is the treatment of choice?
A. Atropine and Protopam chloride IV
B. Rumenal infusion of vinegar (2–8 L) + 3–10 gallons cold water
C. Rumenotomy
D. IV fluids with MgSO4 and Na thiosulfate
E. Relieve bloat, drench with sodium bicarbonate
Correct Answer: B. Rumenal infusion of vinegar + cold water
Rationale: Vinegar (acetic acid) lowers rumen pH, inhibiting urease activity and reducing
ammonia absorption. Cold water dilutes the ruminal contents. This is the first-line treatment for
urea toxicity.
7. A 3-month-old calf dies suddenly after being chased around for 45 minutes. Necropsy
shows endocardial plaques in the left ventricle. What should you advise the farmer?
A. Vitamin E/selenium supplementation for herd
B. Check dam for bovine leukosis
C. Remove ionophores from feed
D. Begin ceftiofur for herd
E. Search barn for lead sources
Correct Answer: A. Vitamin E/selenium supplementation for herd
Rationale: White Muscle Disease (nutritional myodegeneration) causes myocardial necrosis and
sudden death in calves, often after exertion. Supplementing with Vitamin E and selenium
prevents further cases.
Awesome — picking up right where we left off. I’ll keep the exact same MCQ → Correct
Answer → concise rationale flow all the way through this batch.
3
, 8. Which pair of neonatal calf diarrheas both have zoonotic significance?
A. Colibacillosis, Ostertagiasis
B. Colibacillosis, Rotavirus
C. Cryptosporidiosis, Salmonella
D. Salmonella, Coccidiosis
E. C. perfringens, Coronavirus
Correct Answer: C. Cryptosporidiosis, Salmonella
Rationale: Both are important zoonoses; Crypto is a common waterborne pathogen and
Salmonella has numerous animal-to-human routes.
9. Swainsonine is present in which plant?
A. Avocado (Persea americana)
B. Bracken fern (Pteridium aquilinum)
C. Astragalus flavus (Milk vetch)
D. Chokecherry (Prunus virginiana)
E. Oleander (Nerium oleander)
Correct Answer: C. Astragalus flavus (Milk vetch)
Rationale: Swainsonine-containing “locoweeds” (Astragalus/Oxytropis) cause neurologic
“locoism” and, at altitude, right heart failure.
10. 8-yr broodmare with severe colic; reflux 15 L; peritoneal protein 2.8, WBC 11,354.
Which is least likely?
• Epiploic foramen entrapment
• Mesenteric rent
• Small intestinal volvulus
• Strangulating lipoma
Correct Answer: Strangulating lipoma
4
CURRENTLY TESTING AND FREQUENTLY TESTED EXAM
QUESTIONS AND ANSWERS | EXPERT VERIFIED FOR
GUARANTEED PASS | LATEST UPDATE | STUDY GUIDE
INCLUSIVE | STUDY NOTES TOO
1. What nerve(s) need to be blocked in order to dehorn cattle?
A. Auriculotemporal nerve
B. Cornual nerve
C. Infraorbital nerve
D. Infratrochlear nerve
Correct Answer: B. Cornual nerve
Rationale: The cornual nerve, a branch of the zygomaticotemporal nerve, provides sensory
innervation to the horn and surrounding skin in cattle. Blocking it with local anesthetic
desensitizes the horn region for dehorning.
2. What nerve(s) need to be blocked in order to dehorn goats?
A. Cornual nerve only
B. Cornual and auriculotemporal nerves
C. Cornual and infratrochlear nerves
D. Cornual and infraorbital nerves
Correct Answer: C. Cornual and infratrochlear nerves
Rationale: Goats require a block of both the cornual branch of the zygomaticotemporal nerve
and the cornual branch of the infratrochlear nerve because innervation to the horn comes from
two different sources.
3. Several rabbits in a commercial meat operation have developed genital scabs, perineal
ulcerations, and crusty exudate around the nose and eyes. Microhemagglutination tests are
positive for treponematosis. Which treatment is most effective?
1
,A. Amprolium-medicated feed for 2 weeks; increase ventilation
B. Clindamycin PO for exposed rabbits; cull affected animals
C. Ampicillin PO for affected rabbits 10–14 days
D. Isolate affected animals; Lincomycin in water 2–3 weeks
E. Penicillin IM for all rabbits 5–7 days
Correct Answer: E. Penicillin IM for all rabbits 5–7 days
Rationale: Rabbit syphilis (Treponema cuniculi) is effectively treated with injectable penicillin.
Oral antibiotics are ineffective due to gut flora disturbances. Isolation and culling are not curative
strategies.
4. Two bucket-fed veal calves are depressed, stunted, and have sticky feces. Rumen contents
smell rancid with pH 5.2. What is the most appropriate treatment?
A. Cull affected calves
B. Remove fermented rumen contents, flush with saline
C. Wean affected calves and bottle feed healthy calves
D. Vitamin E/Selenium injections
E. Inoculate rumen fluid from a healthy cow into calf
Correct Answer: B. Remove fermented rumen contents, flush with saline
Rationale: This is ruminal drinking syndrome, caused by failure of the reticular groove reflex,
allowing milk into the rumen. Fermented contents must be removed and the rumen flushed.
Weaning may help prevent recurrence, but immediate treatment is lavage.
5. Abortions due to brucellosis in cattle typically occur at what stage of pregnancy?
A. First trimester
B. Second trimester
C. Early gestation only
D. Last half of pregnancy
E. Peripartum only
Correct Answer: D. Last half of pregnancy
Rationale: Brucellosis usually causes abortion in the last half of gestation (5th month onward),
2
,often with stillborn calves. This distinguishes it from some other infectious causes of abortion. It
is a reportable disease.
6. A cow presents with urea/non-protein nitrogen toxicity. What is the treatment of choice?
A. Atropine and Protopam chloride IV
B. Rumenal infusion of vinegar (2–8 L) + 3–10 gallons cold water
C. Rumenotomy
D. IV fluids with MgSO4 and Na thiosulfate
E. Relieve bloat, drench with sodium bicarbonate
Correct Answer: B. Rumenal infusion of vinegar + cold water
Rationale: Vinegar (acetic acid) lowers rumen pH, inhibiting urease activity and reducing
ammonia absorption. Cold water dilutes the ruminal contents. This is the first-line treatment for
urea toxicity.
7. A 3-month-old calf dies suddenly after being chased around for 45 minutes. Necropsy
shows endocardial plaques in the left ventricle. What should you advise the farmer?
A. Vitamin E/selenium supplementation for herd
B. Check dam for bovine leukosis
C. Remove ionophores from feed
D. Begin ceftiofur for herd
E. Search barn for lead sources
Correct Answer: A. Vitamin E/selenium supplementation for herd
Rationale: White Muscle Disease (nutritional myodegeneration) causes myocardial necrosis and
sudden death in calves, often after exertion. Supplementing with Vitamin E and selenium
prevents further cases.
Awesome — picking up right where we left off. I’ll keep the exact same MCQ → Correct
Answer → concise rationale flow all the way through this batch.
3
, 8. Which pair of neonatal calf diarrheas both have zoonotic significance?
A. Colibacillosis, Ostertagiasis
B. Colibacillosis, Rotavirus
C. Cryptosporidiosis, Salmonella
D. Salmonella, Coccidiosis
E. C. perfringens, Coronavirus
Correct Answer: C. Cryptosporidiosis, Salmonella
Rationale: Both are important zoonoses; Crypto is a common waterborne pathogen and
Salmonella has numerous animal-to-human routes.
9. Swainsonine is present in which plant?
A. Avocado (Persea americana)
B. Bracken fern (Pteridium aquilinum)
C. Astragalus flavus (Milk vetch)
D. Chokecherry (Prunus virginiana)
E. Oleander (Nerium oleander)
Correct Answer: C. Astragalus flavus (Milk vetch)
Rationale: Swainsonine-containing “locoweeds” (Astragalus/Oxytropis) cause neurologic
“locoism” and, at altitude, right heart failure.
10. 8-yr broodmare with severe colic; reflux 15 L; peritoneal protein 2.8, WBC 11,354.
Which is least likely?
• Epiploic foramen entrapment
• Mesenteric rent
• Small intestinal volvulus
• Strangulating lipoma
Correct Answer: Strangulating lipoma
4
