NAVLE Practice Exam 262 Questions with Verified Answers
E) Remove the feed; submit samples for mycotoxin testing - CORRECT ANSWER A
commercial swine operation in Iowa reports an outbreak in October among
weanling and grower-finisher pigs with 25 dead animals and 54 more exhibiting
acute onset of dyspnea and weakness. Twenty-four hours after the first pigs
showed clinical signs, some of the worst affected animals became recumbent and
died.
Physical exam of affected pigs shows cyanosis of the mucous membranes and
weakness. Necropsy of a dead animal shows marked pulmonary edema and
hydrothorax.
The farm is a farrow to finish operation, with same-age animals penned and fed
together. The ration for the affected pens is a mixture of corn, rolled oats, dried
whey, soybean meal and a vitamin/mineral pack.
Weanlings get water from nipple waterers and older animals drink from stainless
steel finishing cup waterers, one per pen. The water supply comes from an
unchlorinated well that supplies the whole farm. Barns have concrete floors and
feature hybrid ventilation with wall-mounted variable speed fans and moveable
insulated sidewall curtains, roof-mounted ventilation chimneys, and fresh air
intakes in the ceilings.
What is the best action to take?
A) Report outbreak to state/provincial veterinarian; cull affected animals
B) Check feces for embryonated eggs; remove access to soil/earthworms; treat
survivors with ivermectin
C) Culture nasopharynx of dead pigs; isolate and Rx affected pigs with tylosin
pending culture/sensitivity results
D) Checked humidity, air exchange rates, and positive/negative pressure of
affected barns
E) Remove the feed; submit samples for mycotoxin testing
A) Infectious bursal disease - CORRECT ANSWER What is the presumptive
diagnosis in a chicken with the following necropsy finding?
A) Infectious bursal disease
B) Marek's disease
,C) Renal dystrophy
D) Histomoniasis
E) Avian spirochetosis
C) Neomycin - CORRECT ANSWER Which of these drugs has the greatest potential
for causing acute renal failure in the horse?
A) Xylazine
B) Diphenhydramine
C) Neomycin
D) Oxytetracycline
E) Dexamethasone
E) Full body lyme sulfur dip - CORRECT ANSWER A middle aged MN stray cat is left
on the doorstep of your clinic. The cat has a large dry crusted area of alopecia
over his nose. A skin scraping of the area is negative. The lesion fluoresces under
Wood's lamp examination. Which of the following would be the best treatment?
A) Povidone-iodine scrub
B) Lufenuron
C) Doxycycline
D) Athlete's foot cream (clotrimazole)
E) Full body lyme sulfur dip, itraconazole
E) Administer Ivermectin twice annually, once in the early summer and again in
the fall - CORRECT ANSWER You are asked to perform a necropsy on a 17-year old
Standardbred mare on a large horse ranch. Although not related to the cause of
death, you notice the parasite shown in the image within the stomach. You tell
the owner that this parasite is also responsible for the eggs that he sees
seasonally on the hair of the front legs of his horses. The owner asks what should
be done about this. You discuss the importance of promptly cleaning up feces and
transporting feces away. In addition, which of the following is the most
appropriate recommendation for ongoing control of this parasite?
A) Administer Ivermectin twice annually, once in the early spring and again in the
winter
B) Administer fenbendazole twice annually, once in the early summer and again in
late summer
C) Administer fenbendazole twice annually, once in the early spring and again in
the fall
,D) There is no need to treat these parasites because they are not associated with
disease in horses
E) Administer Ivermectin twice annually, once in the early summer and again in
the fall
B) Topical cyclosporine and a topical steroid - CORRECT ANSWER A 6-year old
West Highland White Terrier comes in to see you for the mucopurulent ocular
discharge as seen in the photo below. A Schirmer tear test shows no tear
production. What is the treatment of choice for chronic canine
keratoconjunctivitis sicca?
A) Topical cyclosporine and systemic corticosteroids
B) Topical cyclosporine and a topical steroid
C) Systemic antibiotics and corticosteroids
D) Systemic cyclosporine and antibiotics
C) Serial Progesterone testing - CORRECT ANSWER A female show dog is
approaching estrus and the owner has consulted you about planning a breeding
for this dog.
She is aware of the signs of proestrus and plans to contact you when those are
apparent in her dog.
In addition to vaginal cytology, which one of the following will be the most useful
to you in planning the timing of breeding?
A) Determination of serum estrogen levels
B) Timed administration of luteinizing hormone
C) Serial progesterone testing
D) Vaginoscopy
E) Ovarian ultrasonography
B) Cauda equina syndrome - CORRECT ANSWER A seven-year old male German
Shepherd is presented with a history of weakness in the hind limbs, urinary
incontinence and recent obsessive chewing around his tail area.
Dorsiflexion of the tail over the back and extension of the hind limbs elicits a
painful response.
He does not withdraw each hind leg when a toe is pinched, but bears weight on
the hindlimbs. Patellar reflexes are normal.
What is the clinical diagnosis?
A) Radiculoneuritis
, B) Cauda equina syndrome
C) Hip dysplasia
D) Diskospondylitis
E) Wobbler syndrome
C) Ivermectin in early fall - CORRECT ANSWER A client brings the one-half inch
grub shown in the image to you one spring day, telling you it emerged from a hole
in the back of one of his prize show cattle. He wants to know what to treat his
cattle with and when.
A) Thiabendazole in early fall
B) Ivermectin in February
C) Ivermectin in early fall
D) Organophosphates in summer
E) Moxidectin now, in spring
E) Strong chance of lifelong FeLV infection - CORRECT ANSWER An adopted adult
male cat from a shelter with an unknown vaccination history is presented. The cat
tests positive for feline leukemia virus (FeLV) infection by IFA.
What should the owner be told?
A - Possible transient FeLV infection
B - Need an ELISA test in 12 weeks to confirm diagnosis
C - Cat may be vaccinated for FeLV
D - Need a Western blot test to confirm diagnosis
E - Strong chance of lifelong FeLV infection
D) Equine Degenerative Myeloencephalopathy - CORRECT ANSWER A 1.5-year old
Quarter Horse gelding is presented to you for symmetric ataxia, weakness, and
spasticity of all limbs, but worse in the hind limbs. When walking, the horse
frequently drags his toes and the hind limbs frequently interfere with one
another. Based on the signalment, history and physical examination findings,
which of the following is the most likely cause of these clinical signs?
A) Equine Motor Neuron Disease (EMND)
B) Botulism
C) Equine Protozoal Myeloencephalitis (EPM)
D) Equine Degenerative Myeloencephalopathy (EDM)
E) Cauda Equina Syndrome
E) Remove the feed; submit samples for mycotoxin testing - CORRECT ANSWER A
commercial swine operation in Iowa reports an outbreak in October among
weanling and grower-finisher pigs with 25 dead animals and 54 more exhibiting
acute onset of dyspnea and weakness. Twenty-four hours after the first pigs
showed clinical signs, some of the worst affected animals became recumbent and
died.
Physical exam of affected pigs shows cyanosis of the mucous membranes and
weakness. Necropsy of a dead animal shows marked pulmonary edema and
hydrothorax.
The farm is a farrow to finish operation, with same-age animals penned and fed
together. The ration for the affected pens is a mixture of corn, rolled oats, dried
whey, soybean meal and a vitamin/mineral pack.
Weanlings get water from nipple waterers and older animals drink from stainless
steel finishing cup waterers, one per pen. The water supply comes from an
unchlorinated well that supplies the whole farm. Barns have concrete floors and
feature hybrid ventilation with wall-mounted variable speed fans and moveable
insulated sidewall curtains, roof-mounted ventilation chimneys, and fresh air
intakes in the ceilings.
What is the best action to take?
A) Report outbreak to state/provincial veterinarian; cull affected animals
B) Check feces for embryonated eggs; remove access to soil/earthworms; treat
survivors with ivermectin
C) Culture nasopharynx of dead pigs; isolate and Rx affected pigs with tylosin
pending culture/sensitivity results
D) Checked humidity, air exchange rates, and positive/negative pressure of
affected barns
E) Remove the feed; submit samples for mycotoxin testing
A) Infectious bursal disease - CORRECT ANSWER What is the presumptive
diagnosis in a chicken with the following necropsy finding?
A) Infectious bursal disease
B) Marek's disease
,C) Renal dystrophy
D) Histomoniasis
E) Avian spirochetosis
C) Neomycin - CORRECT ANSWER Which of these drugs has the greatest potential
for causing acute renal failure in the horse?
A) Xylazine
B) Diphenhydramine
C) Neomycin
D) Oxytetracycline
E) Dexamethasone
E) Full body lyme sulfur dip - CORRECT ANSWER A middle aged MN stray cat is left
on the doorstep of your clinic. The cat has a large dry crusted area of alopecia
over his nose. A skin scraping of the area is negative. The lesion fluoresces under
Wood's lamp examination. Which of the following would be the best treatment?
A) Povidone-iodine scrub
B) Lufenuron
C) Doxycycline
D) Athlete's foot cream (clotrimazole)
E) Full body lyme sulfur dip, itraconazole
E) Administer Ivermectin twice annually, once in the early summer and again in
the fall - CORRECT ANSWER You are asked to perform a necropsy on a 17-year old
Standardbred mare on a large horse ranch. Although not related to the cause of
death, you notice the parasite shown in the image within the stomach. You tell
the owner that this parasite is also responsible for the eggs that he sees
seasonally on the hair of the front legs of his horses. The owner asks what should
be done about this. You discuss the importance of promptly cleaning up feces and
transporting feces away. In addition, which of the following is the most
appropriate recommendation for ongoing control of this parasite?
A) Administer Ivermectin twice annually, once in the early spring and again in the
winter
B) Administer fenbendazole twice annually, once in the early summer and again in
late summer
C) Administer fenbendazole twice annually, once in the early spring and again in
the fall
,D) There is no need to treat these parasites because they are not associated with
disease in horses
E) Administer Ivermectin twice annually, once in the early summer and again in
the fall
B) Topical cyclosporine and a topical steroid - CORRECT ANSWER A 6-year old
West Highland White Terrier comes in to see you for the mucopurulent ocular
discharge as seen in the photo below. A Schirmer tear test shows no tear
production. What is the treatment of choice for chronic canine
keratoconjunctivitis sicca?
A) Topical cyclosporine and systemic corticosteroids
B) Topical cyclosporine and a topical steroid
C) Systemic antibiotics and corticosteroids
D) Systemic cyclosporine and antibiotics
C) Serial Progesterone testing - CORRECT ANSWER A female show dog is
approaching estrus and the owner has consulted you about planning a breeding
for this dog.
She is aware of the signs of proestrus and plans to contact you when those are
apparent in her dog.
In addition to vaginal cytology, which one of the following will be the most useful
to you in planning the timing of breeding?
A) Determination of serum estrogen levels
B) Timed administration of luteinizing hormone
C) Serial progesterone testing
D) Vaginoscopy
E) Ovarian ultrasonography
B) Cauda equina syndrome - CORRECT ANSWER A seven-year old male German
Shepherd is presented with a history of weakness in the hind limbs, urinary
incontinence and recent obsessive chewing around his tail area.
Dorsiflexion of the tail over the back and extension of the hind limbs elicits a
painful response.
He does not withdraw each hind leg when a toe is pinched, but bears weight on
the hindlimbs. Patellar reflexes are normal.
What is the clinical diagnosis?
A) Radiculoneuritis
, B) Cauda equina syndrome
C) Hip dysplasia
D) Diskospondylitis
E) Wobbler syndrome
C) Ivermectin in early fall - CORRECT ANSWER A client brings the one-half inch
grub shown in the image to you one spring day, telling you it emerged from a hole
in the back of one of his prize show cattle. He wants to know what to treat his
cattle with and when.
A) Thiabendazole in early fall
B) Ivermectin in February
C) Ivermectin in early fall
D) Organophosphates in summer
E) Moxidectin now, in spring
E) Strong chance of lifelong FeLV infection - CORRECT ANSWER An adopted adult
male cat from a shelter with an unknown vaccination history is presented. The cat
tests positive for feline leukemia virus (FeLV) infection by IFA.
What should the owner be told?
A - Possible transient FeLV infection
B - Need an ELISA test in 12 weeks to confirm diagnosis
C - Cat may be vaccinated for FeLV
D - Need a Western blot test to confirm diagnosis
E - Strong chance of lifelong FeLV infection
D) Equine Degenerative Myeloencephalopathy - CORRECT ANSWER A 1.5-year old
Quarter Horse gelding is presented to you for symmetric ataxia, weakness, and
spasticity of all limbs, but worse in the hind limbs. When walking, the horse
frequently drags his toes and the hind limbs frequently interfere with one
another. Based on the signalment, history and physical examination findings,
which of the following is the most likely cause of these clinical signs?
A) Equine Motor Neuron Disease (EMND)
B) Botulism
C) Equine Protozoal Myeloencephalitis (EPM)
D) Equine Degenerative Myeloencephalopathy (EDM)
E) Cauda Equina Syndrome
