NAVLE Prep Exam 2024 | NAVLE Exam
Update 2024 Questions and Correct
Answers Rated A+
What nerve(s) need to be blocked in order to dehorn cattle? -
ANSWER-Cornual
What nerve(s) need to be blocked in order to dehorn goats? -
ANSWER-cornual nerve and infratrochlear nerve
Several rabbits in a commercial meat operation have developed
genital scabs, perineal ulcerations a crusty exudate around the nose
and eyes. Microhemaglutination tests are positive for treponematosis.
Which one of the following steps is most effective to treat this
problem?
A - Amprolium-medicated feed for whole herd, 2 weeks; Increase
ventilation
B - Clindamycin PO for exposed rabbits, 8 days; Cull affected animals
C - Amipcillin 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 -ANSWER-Penicillin IM for all
rabbits, 5-7 days
Two bucket-fed veal calves are depressed and stunted and have
sticky feces coating their hindquarters. Fluid-splashing sounds are
audible during auscultation over the left flank when a calf is drinking.
,Passage of a stomach tube obtains a rancid-smelling liquid with a pH
of 5.2 [N=5.9-6.2]
Which one of the following choices is the most appropriate treatment?
A - Cull affected calves
B - Remove fermented rumen contents, flush with saline
C - Wean affected calves; Shift to bottle-feeding for well calves
D - Vitamin E/Selenium injections, plus dietary supplements
E - Inoculate rumen fluid from a healthy cow into calf by stomach tube
-ANSWER-B - Remove fermented rumen contents, flush with saline
This is the clinical picture of a ruminal drinker calf with chronic
indigestion from milk deposited directly into the rumen.
Treat by removing the fermented material and flushing the rumen with
saline. Attempt to induce gastric/reticular groove closure during
feeding by inducing vigorous sucking activity with a finger before
feeding milk. If calves relapse, consider weaning.
The problem occurs due to failure of the gastric groove reflex, which
normally shunts milk directly into the abomasum, (bypassing the
rumen). Most often seen in bucket fed calves who gulp their milk.
Abortions due to brucellosis tend to occur at what stage of pregnancy?
-ANSWER-D - Last half of pregnancy
Typically, Brucellosis causes abortion in the LAST HALF of
pregnancy, for the 5th month onwards. Last trimester is also a good
answer, though not entirely correct. You might remember "Bruce is
always late".
,Expect STILLBORN calves. Cows only abort ONCE.
Brucellosis is REPORTABLE.
The vaccines used are the Brucella abortus strain 19 vaccine or the
RB51 vaccine, given to heifer calves 4-12 months old, along with a
USDA tattoo in the right ear. Remember: "The right ear is the RIGHT
EAR".
BVD and Trichomoniasis (occasionally) can cause early abortion in
cows, but MOST things cause abortion late, like 3rd trimester.
Listeriosis and Arcanobacterium pyogenes can cause abortion at any
time during pregnancy.
A cow is presented on emergency with urea/non-protein nitrogen
toxicity.
What is the treatment of choice?
A - Atropine, Protopam chloride IV q 4-6 hours
B - Rumenal infusion 2-8 liters vinegar,3-10 gallons cold water
C - Rumenotomy
D - IV Fluids with MgSO4, Na thiosulfate PO
E - Relieve bloat, drench with 2-8 liters sodium bicarbonate -
ANSWER-B - Rumenal infusion 2-8 liters vinegar,3-10 gallons cold
water
A 3-month old calf is presented for necropsy. The calf collapsed and
suddenly died this morning after she escaped and was chased around
the back pasture for 45 minutes by her owner.
, Among other things, endocardial plaques in the left ventricle of this
calf's heart are discovered.
What advice should be given the farmer?
A - Treat the other calves with vitamin E/Selenium
B - Check the mother for bovine leukosis by AGID
C - Take all the calves off ionophore-containing feed
D - Start the other calves on Ceftiofur (Naxcel ®)
E - Search the calf barn for sources of lead -ANSWER-A - Treat the
other calves with vitamin E/Selenium
Treat the other calves with vitamin E/Selenium. Think White Muscle
Disease when you see SUDDEN DEATH and endocardial PLAQUES
in a young calf, lamb or kid with a history of recent VIGOROUS
EXERCISE. Follow this link to a Merck image of pale ventricular
myocardium.
Typically seen in young, fast-growing animals (ie: calves 2 weeks-6
mos) Clinical signs may include dyspnea (due to myocardial disease),
stiff gait, arched back, weakness, recumbent but BAR (bright, alert,
responsive).
Sudden death may resemble enterotoxemia, should see acute bloody
diarrhea, convulsions, opisthotonos in first days of life with
enterotoxemia.
Which pair of neonatal calf diarrheas both have public health/zoonotic
significance?
A - Colibacillosis, Ostertagiasis
B - Colibacillosis, Rotavirus
Update 2024 Questions and Correct
Answers Rated A+
What nerve(s) need to be blocked in order to dehorn cattle? -
ANSWER-Cornual
What nerve(s) need to be blocked in order to dehorn goats? -
ANSWER-cornual nerve and infratrochlear nerve
Several rabbits in a commercial meat operation have developed
genital scabs, perineal ulcerations a crusty exudate around the nose
and eyes. Microhemaglutination tests are positive for treponematosis.
Which one of the following steps is most effective to treat this
problem?
A - Amprolium-medicated feed for whole herd, 2 weeks; Increase
ventilation
B - Clindamycin PO for exposed rabbits, 8 days; Cull affected animals
C - Amipcillin 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 -ANSWER-Penicillin IM for all
rabbits, 5-7 days
Two bucket-fed veal calves are depressed and stunted and have
sticky feces coating their hindquarters. Fluid-splashing sounds are
audible during auscultation over the left flank when a calf is drinking.
,Passage of a stomach tube obtains a rancid-smelling liquid with a pH
of 5.2 [N=5.9-6.2]
Which one of the following choices is the most appropriate treatment?
A - Cull affected calves
B - Remove fermented rumen contents, flush with saline
C - Wean affected calves; Shift to bottle-feeding for well calves
D - Vitamin E/Selenium injections, plus dietary supplements
E - Inoculate rumen fluid from a healthy cow into calf by stomach tube
-ANSWER-B - Remove fermented rumen contents, flush with saline
This is the clinical picture of a ruminal drinker calf with chronic
indigestion from milk deposited directly into the rumen.
Treat by removing the fermented material and flushing the rumen with
saline. Attempt to induce gastric/reticular groove closure during
feeding by inducing vigorous sucking activity with a finger before
feeding milk. If calves relapse, consider weaning.
The problem occurs due to failure of the gastric groove reflex, which
normally shunts milk directly into the abomasum, (bypassing the
rumen). Most often seen in bucket fed calves who gulp their milk.
Abortions due to brucellosis tend to occur at what stage of pregnancy?
-ANSWER-D - Last half of pregnancy
Typically, Brucellosis causes abortion in the LAST HALF of
pregnancy, for the 5th month onwards. Last trimester is also a good
answer, though not entirely correct. You might remember "Bruce is
always late".
,Expect STILLBORN calves. Cows only abort ONCE.
Brucellosis is REPORTABLE.
The vaccines used are the Brucella abortus strain 19 vaccine or the
RB51 vaccine, given to heifer calves 4-12 months old, along with a
USDA tattoo in the right ear. Remember: "The right ear is the RIGHT
EAR".
BVD and Trichomoniasis (occasionally) can cause early abortion in
cows, but MOST things cause abortion late, like 3rd trimester.
Listeriosis and Arcanobacterium pyogenes can cause abortion at any
time during pregnancy.
A cow is presented on emergency with urea/non-protein nitrogen
toxicity.
What is the treatment of choice?
A - Atropine, Protopam chloride IV q 4-6 hours
B - Rumenal infusion 2-8 liters vinegar,3-10 gallons cold water
C - Rumenotomy
D - IV Fluids with MgSO4, Na thiosulfate PO
E - Relieve bloat, drench with 2-8 liters sodium bicarbonate -
ANSWER-B - Rumenal infusion 2-8 liters vinegar,3-10 gallons cold
water
A 3-month old calf is presented for necropsy. The calf collapsed and
suddenly died this morning after she escaped and was chased around
the back pasture for 45 minutes by her owner.
, Among other things, endocardial plaques in the left ventricle of this
calf's heart are discovered.
What advice should be given the farmer?
A - Treat the other calves with vitamin E/Selenium
B - Check the mother for bovine leukosis by AGID
C - Take all the calves off ionophore-containing feed
D - Start the other calves on Ceftiofur (Naxcel ®)
E - Search the calf barn for sources of lead -ANSWER-A - Treat the
other calves with vitamin E/Selenium
Treat the other calves with vitamin E/Selenium. Think White Muscle
Disease when you see SUDDEN DEATH and endocardial PLAQUES
in a young calf, lamb or kid with a history of recent VIGOROUS
EXERCISE. Follow this link to a Merck image of pale ventricular
myocardium.
Typically seen in young, fast-growing animals (ie: calves 2 weeks-6
mos) Clinical signs may include dyspnea (due to myocardial disease),
stiff gait, arched back, weakness, recumbent but BAR (bright, alert,
responsive).
Sudden death may resemble enterotoxemia, should see acute bloody
diarrhea, convulsions, opisthotonos in first days of life with
enterotoxemia.
Which pair of neonatal calf diarrheas both have public health/zoonotic
significance?
A - Colibacillosis, Ostertagiasis
B - Colibacillosis, Rotavirus
