NAVLE Practice Exam
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1. A 6-year-old Thoroughbred gelding was involved in a motor vehicle collision
while riding in a trailer three weeks ago. Physical examination shows heling
superficial abrasions on the face. A photograph is shown. Injury to which of
the following nerves is the most likely underlying causes of these findings?
A) Left Facial (VII) Nerve
B) Right Facial (VII) Nerve
C) Left Trigeminal (V) Nerve
D) Right Trigeminal (V) Nerve
E) Left infraorbital nerve
F) Right Infraorbital Nerve: B) Right Facial (VII) Nerve
2. In cases of pyothorax in cats, what type of microorganisms are most fre-
quently cultured from pleural fluid?
A) Chlamydiae
B) Mycoplasmas
C) Obligate anaerobes
D) Spirochetes
E) Yeasts: C) Obligate anaerobes
3. A 6-year-old male Cocker Spaniel has recurrent otitis externa. Microscopic
examination of a smear of purulent ear discharge shows large numbers of rod
shaped bacteria. What is the most likely causative organism?
A) Escheria coli
B) Klebsiella spp
C) Pasturella multocida
D) Pseudomonas aeruginosa
E) Staphylococcus intermedius: D) Pseudomonas aeruginosa
4. An 82-lb (37 kg) 8-year-old MN German Shepherd mix is being evaluated
for a 2 month history of decreased exercise tolerance. The client reports that
the dog had two episodes of profound weakness on walks during the past
week. The dog seems comfortable at home but his "heart is always racing."
Two years ago the dog was diagnosed by another vet with hypothyroidism
and prescribed oral levothyroxine 0.8 mg twice daily. Dosage was reevaluated
one month after initiation and was determined to be appropriate. Appetite,
urination, and bowel movements are normal. BCS is 6/9. Temp 101.2 F and HR
180 bpm. The dog is panting. Pulse deficits are occuring 3-5x/min. No other
abnormalities are noted. CBC, serum chemistry, and urinalysis are WNL. Which
of the following is the most likely cause of episodic weakness in this dog?
A) Decreased cardiac output
B) Electrolyte imbalance
C) Neurogenic weakness
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D) osteoarthritis
E) ventilation-perfusion mismatch: A) Decreased Cardiac Output
5. Fifteen of a group of 200, 7-month old feedlot calves are lame. The calves
arrived at the feedlot approximately 1 month ago, and one week later 40 of
the animals developed pneumonia. These calves were treated with oxytetra-
cycline, and pneumonia appeared to resolve. On Physical examination, the
affected calves have swellings in the carpi, tarsi, and stifles with distension of
associated tendon sheaths and a stiff gait. Two calves are euthanized. Post-
morten examination shows fibrinous pleuritis and papillary muscle necrosis.
Which of the following organisms is the most likely cause of these agents?
A) Arcanobacterium (Actinomyces) pyogenes
B)Histophilus somni (Haemophilus somnus)
C) Mannheima (Pasturella) haemolytica
D) Pasturella multocida
E) Salmonella typhimurium: B) Histophilus somni
6. A 2-year old spayed female indoor/outdoor Singapura cat has had several
facial pruritis for the past two weeks. Vaccinations are up-to-date and the cat
is on a monthly regimen of topical imidaclorid. Examination of the skin shows
linear ulcers along the ventral aspects of both mandibles and miliary scabs
on the ventral and lateral aspects of the neck. The remainder of the dermis
appears normal. Deep and surface skin scrapings and dermatophyte culture
are negative. Which of the following is the most appropriate next diagnostic
step.
A) Serum Allergy Testing
B) Thyroid function testing
C) Trial of hypoallergenic diet
D) Trial of IM methylprednisolone
E) Trial of intramuscular cyclosporine: C) Trial of hypoallergenic diet.
7. A 9-month-old intact male Siberian Husky dog is being evaluated because
of a cough of 2 week duration. These lesions at the carina are seen on
bronchoscopic exam. Which of the following is the most appropriate pharma-
cotherapy?
A) Amoxicillin
B) Chlorpheniramine
C) Dextromethorphan
D) Ivermectin
E) Prednisone: D) Ivermectin
8. A 5-year old Simmental cow who is used as a donor for embryo transfer
is evaluated because of the acute onset of anorexia and lethargy. She has
, NAVLE Practice Exam
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been flushed six times; the most recent flushing occurred 10 days ago. Rectal
temperature is 104.0 F. During physical exam the cow is reluctant to moce
and periodically kicks at her abdomen. ON rectal palpation the left kidney is
grossly enlarged and has a smoot texture. When stimulated to urinate, the
urine is grossly hematuric; numerous blood clots and fibrin are present. Which
of the following is the most appropriate treatment?
A) administration of gentamicin intravenously
B) Administration of procaine penicillin G intramuscularly
C) Long-term catheterization of the bladder
D) Surgical removal of the enlarged kidney
E) No treatment is indicated.: B) Administration of procaine penicillin G intramus-
cularly
9. A 13 year old cat has a large, firm mass of the third mammary gland on the
right side. Which of the following represents the likelihood that this tumor is
malignant
A) 10%
B) 25%
C) 40%
D) 60%
E) 90%: E) 90%
10. In October, six mixed-breed beef cows and three calves are being evaluat-
ed because of a one-day history of droopy ears, squinting, rubbing their heads
on objects, ataxia. Four days ago, the cows and calves escaped from their pas-
ture and were found the next day eating lush clover, buckwheat, and ryegrass
in a food plot a neighbor has planted to attract deer. The cattle were returned to
their home pens and fed their usual diet of timothy hay and ocmmercial grain
supplement. Today, vital signs of one of the calf are: temperature 102.5F, heart
rate 85 bpm, and R 35 brpm. Exam shows blephorospasm, edema, erythema,
serous exudate, and matting of the hair, which are most severe on the ears,
eyelids, external nares, and lips. Animals with white faces seem most severely
affected. Which of the following is the most likely cause of these findings?
A) Dermatophilosis
B) Infectious bovine keratoconjunctivities
C) infectious bovine rhinotracheitis
D) Primary photosensitization
E) Secondary photosensitization: D) Primary photosensitization
11. A group of 1000 5-week old pigs has experienced a 25 death loss since
weaning two weeks ago. Most of the deaths were sudden; however, approxi-
mately 3% of the pigs showed clinical signs of lethargy, lameness, and labored
, NAVLE Practice Exam
Study online at https://quizlet.com/_cn2fsq
breathing before dying. Postmortem exam of an affected pig shows severe
fibrinous pleuritis, pericarditis, and peritonitis. Which of the following is the
most likely causal organism?
A) Arcanobacterium suis
B) Escheria coli
C) Haemophilus parasuis
D) Salmonella choleraesuis
E) Streptococcus suis: C) Haemophilus parasuis
12. Blastomycosis may be disseminated in dogs, but which of the following is
most frequently the primary site of involvement.
A)Intestine
B) Liver
C) Lungs
D) Nasal Cavity
E) Spleen: C) Lungs
13. Approximately 10% of the piglets in farrowing rooms of a swine farm
have mild, watery-to-pasty diarrhea. The manager of the farm reports that this
diarrhea occurs sporadically in litters as early as two to three days of age and
is most prevelant in gilt litters. Mortality resulting from this diarrhea is low, but
dehydration and a poor growth rate lead to lower weaning weights. Treatment
with gentamicin has been ineffective, so the manager does not treat the piglets
for diarrhea. Which of the following is the most likely causal agent?
A) Circovirus
B) Parvovirus
C) Porcine enterovirus
D) Rotavirus
E) Transmissible gastroenteritis virus: D) Rotavirus
14. At the present time, which of the following is the most effective manage-
ment for eradication of brucellosis in cattle?
A) Serologic identification and vaccination of infected animals
B) Serologic identification of infected animals followed by isolation and
slaughter
C) Vaccination of all animals as calves
D) Vaccination of all animals that had no detectable serologic titer
E) Vaccination of all susceptible animals as calves and before pregnancy: B)
Serologic identification of infected animals followed by isolation and slaughter.
15. A 10-year-old dog has had difficulty walking for the past week. Findings on
physical and neurologic examinations include hypermetria and a decreased
hopping reflex in the left fore- and hindlimbs. A lesion is most likely to be
Study online at https://quizlet.com/_cn2fsq
1. A 6-year-old Thoroughbred gelding was involved in a motor vehicle collision
while riding in a trailer three weeks ago. Physical examination shows heling
superficial abrasions on the face. A photograph is shown. Injury to which of
the following nerves is the most likely underlying causes of these findings?
A) Left Facial (VII) Nerve
B) Right Facial (VII) Nerve
C) Left Trigeminal (V) Nerve
D) Right Trigeminal (V) Nerve
E) Left infraorbital nerve
F) Right Infraorbital Nerve: B) Right Facial (VII) Nerve
2. In cases of pyothorax in cats, what type of microorganisms are most fre-
quently cultured from pleural fluid?
A) Chlamydiae
B) Mycoplasmas
C) Obligate anaerobes
D) Spirochetes
E) Yeasts: C) Obligate anaerobes
3. A 6-year-old male Cocker Spaniel has recurrent otitis externa. Microscopic
examination of a smear of purulent ear discharge shows large numbers of rod
shaped bacteria. What is the most likely causative organism?
A) Escheria coli
B) Klebsiella spp
C) Pasturella multocida
D) Pseudomonas aeruginosa
E) Staphylococcus intermedius: D) Pseudomonas aeruginosa
4. An 82-lb (37 kg) 8-year-old MN German Shepherd mix is being evaluated
for a 2 month history of decreased exercise tolerance. The client reports that
the dog had two episodes of profound weakness on walks during the past
week. The dog seems comfortable at home but his "heart is always racing."
Two years ago the dog was diagnosed by another vet with hypothyroidism
and prescribed oral levothyroxine 0.8 mg twice daily. Dosage was reevaluated
one month after initiation and was determined to be appropriate. Appetite,
urination, and bowel movements are normal. BCS is 6/9. Temp 101.2 F and HR
180 bpm. The dog is panting. Pulse deficits are occuring 3-5x/min. No other
abnormalities are noted. CBC, serum chemistry, and urinalysis are WNL. Which
of the following is the most likely cause of episodic weakness in this dog?
A) Decreased cardiac output
B) Electrolyte imbalance
C) Neurogenic weakness
, NAVLE Practice Exam
Study online at https://quizlet.com/_cn2fsq
D) osteoarthritis
E) ventilation-perfusion mismatch: A) Decreased Cardiac Output
5. Fifteen of a group of 200, 7-month old feedlot calves are lame. The calves
arrived at the feedlot approximately 1 month ago, and one week later 40 of
the animals developed pneumonia. These calves were treated with oxytetra-
cycline, and pneumonia appeared to resolve. On Physical examination, the
affected calves have swellings in the carpi, tarsi, and stifles with distension of
associated tendon sheaths and a stiff gait. Two calves are euthanized. Post-
morten examination shows fibrinous pleuritis and papillary muscle necrosis.
Which of the following organisms is the most likely cause of these agents?
A) Arcanobacterium (Actinomyces) pyogenes
B)Histophilus somni (Haemophilus somnus)
C) Mannheima (Pasturella) haemolytica
D) Pasturella multocida
E) Salmonella typhimurium: B) Histophilus somni
6. A 2-year old spayed female indoor/outdoor Singapura cat has had several
facial pruritis for the past two weeks. Vaccinations are up-to-date and the cat
is on a monthly regimen of topical imidaclorid. Examination of the skin shows
linear ulcers along the ventral aspects of both mandibles and miliary scabs
on the ventral and lateral aspects of the neck. The remainder of the dermis
appears normal. Deep and surface skin scrapings and dermatophyte culture
are negative. Which of the following is the most appropriate next diagnostic
step.
A) Serum Allergy Testing
B) Thyroid function testing
C) Trial of hypoallergenic diet
D) Trial of IM methylprednisolone
E) Trial of intramuscular cyclosporine: C) Trial of hypoallergenic diet.
7. A 9-month-old intact male Siberian Husky dog is being evaluated because
of a cough of 2 week duration. These lesions at the carina are seen on
bronchoscopic exam. Which of the following is the most appropriate pharma-
cotherapy?
A) Amoxicillin
B) Chlorpheniramine
C) Dextromethorphan
D) Ivermectin
E) Prednisone: D) Ivermectin
8. A 5-year old Simmental cow who is used as a donor for embryo transfer
is evaluated because of the acute onset of anorexia and lethargy. She has
, NAVLE Practice Exam
Study online at https://quizlet.com/_cn2fsq
been flushed six times; the most recent flushing occurred 10 days ago. Rectal
temperature is 104.0 F. During physical exam the cow is reluctant to moce
and periodically kicks at her abdomen. ON rectal palpation the left kidney is
grossly enlarged and has a smoot texture. When stimulated to urinate, the
urine is grossly hematuric; numerous blood clots and fibrin are present. Which
of the following is the most appropriate treatment?
A) administration of gentamicin intravenously
B) Administration of procaine penicillin G intramuscularly
C) Long-term catheterization of the bladder
D) Surgical removal of the enlarged kidney
E) No treatment is indicated.: B) Administration of procaine penicillin G intramus-
cularly
9. A 13 year old cat has a large, firm mass of the third mammary gland on the
right side. Which of the following represents the likelihood that this tumor is
malignant
A) 10%
B) 25%
C) 40%
D) 60%
E) 90%: E) 90%
10. In October, six mixed-breed beef cows and three calves are being evaluat-
ed because of a one-day history of droopy ears, squinting, rubbing their heads
on objects, ataxia. Four days ago, the cows and calves escaped from their pas-
ture and were found the next day eating lush clover, buckwheat, and ryegrass
in a food plot a neighbor has planted to attract deer. The cattle were returned to
their home pens and fed their usual diet of timothy hay and ocmmercial grain
supplement. Today, vital signs of one of the calf are: temperature 102.5F, heart
rate 85 bpm, and R 35 brpm. Exam shows blephorospasm, edema, erythema,
serous exudate, and matting of the hair, which are most severe on the ears,
eyelids, external nares, and lips. Animals with white faces seem most severely
affected. Which of the following is the most likely cause of these findings?
A) Dermatophilosis
B) Infectious bovine keratoconjunctivities
C) infectious bovine rhinotracheitis
D) Primary photosensitization
E) Secondary photosensitization: D) Primary photosensitization
11. A group of 1000 5-week old pigs has experienced a 25 death loss since
weaning two weeks ago. Most of the deaths were sudden; however, approxi-
mately 3% of the pigs showed clinical signs of lethargy, lameness, and labored
, NAVLE Practice Exam
Study online at https://quizlet.com/_cn2fsq
breathing before dying. Postmortem exam of an affected pig shows severe
fibrinous pleuritis, pericarditis, and peritonitis. Which of the following is the
most likely causal organism?
A) Arcanobacterium suis
B) Escheria coli
C) Haemophilus parasuis
D) Salmonella choleraesuis
E) Streptococcus suis: C) Haemophilus parasuis
12. Blastomycosis may be disseminated in dogs, but which of the following is
most frequently the primary site of involvement.
A)Intestine
B) Liver
C) Lungs
D) Nasal Cavity
E) Spleen: C) Lungs
13. Approximately 10% of the piglets in farrowing rooms of a swine farm
have mild, watery-to-pasty diarrhea. The manager of the farm reports that this
diarrhea occurs sporadically in litters as early as two to three days of age and
is most prevelant in gilt litters. Mortality resulting from this diarrhea is low, but
dehydration and a poor growth rate lead to lower weaning weights. Treatment
with gentamicin has been ineffective, so the manager does not treat the piglets
for diarrhea. Which of the following is the most likely causal agent?
A) Circovirus
B) Parvovirus
C) Porcine enterovirus
D) Rotavirus
E) Transmissible gastroenteritis virus: D) Rotavirus
14. At the present time, which of the following is the most effective manage-
ment for eradication of brucellosis in cattle?
A) Serologic identification and vaccination of infected animals
B) Serologic identification of infected animals followed by isolation and
slaughter
C) Vaccination of all animals as calves
D) Vaccination of all animals that had no detectable serologic titer
E) Vaccination of all susceptible animals as calves and before pregnancy: B)
Serologic identification of infected animals followed by isolation and slaughter.
15. A 10-year-old dog has had difficulty walking for the past week. Findings on
physical and neurologic examinations include hypermetria and a decreased
hopping reflex in the left fore- and hindlimbs. A lesion is most likely to be
