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SMEC - NAVLE Board Prep Practice Exam
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SMEC - NAVLE Board Prep Practice Exam
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SMEC - NAVLE Board Prep Practice Exam4 pigs have been born, they are all dry, and the sow appears
pregnant Correct Answer Which of the following is most likely to
be an indicator of dystocia in the sow?
- A piglet is presented hind legs first
- 20 minutes have elapsed since the last piglet was born
- Part of the placenta has been expelled with the first 4 pigs
- 4 pigs have been born, they are all dry, and the sow appears
pregnant
High levels of carbon monoxide resulted in fetal death and
pregnancy loss Correct Answer You are called out to a 5,000
head sow farm in Iowa in December that has experienced a large
number of sudden reproductive losses. When you arrive at the
farm the farm manager shows you the farrowing room where all of
the losses have occurred. The sows had just been moved into
farrowing and were due to farrow in a day or two. The affected
sows have had entire litters born dead, but appear full-term and
otherwise normal. You do not appreciate any gross lesions in
piglets. No other sows on the farm are affected. The manager is
very concerned because they had a huge number of late-term
abortions two winters ago and last time it "took months for
everything to cool down" and start weaning normal, healthy pigs
again. What is the most likely cause of the current losses on the
farm?
- These are abortions & mummies due to PPV
- These late-term abortions are most likely due to PRRSV
infection
- The stress of moving these sows into farrowing likely caused
these pregnancy losses
,- High levels of carbon monoxide resulted in fetal death and
pregnancy loss
- These late-term abortions are most likely due to Porcine
Circovirus type 2 (PCV2) infection
Sarcoptes scabiei Correct Answer Four weeks after returning
from a state fair exhibition where they were housed with other
pigs, seven pigs develop pruritis and begin rubbing on any fixed
penning or equipment available for relief. Physical exam reveals
encrusted, plaque-like lesions that are most prevalent around the
head and neck and coalesce on the inner (scaphal) surface of the
ears. Mild, focal erythematous skin papules are distributed on the
rump, flank and abdomen. All other observations are within
normal limits. What is the most likely cause of the lesions?
a. Sarcoptes scabiei
b. Mycoplasma suis
c. Musca domestica
d. Dermacentor suis
e. Porcine circovirus type 2
Ascaris suum Correct Answer You are called to a client's farm to
evaluate chronic respiratory disease. The farrow to finish farm
breeds and gestates sows in outdoor dirt lots and then moves
them into a modern confinement barn for farrowing and lactation.
Once pigs are weaned, they are housed in a barn that has
minimal environmental control, a dirt floor and deep bedding of
corn stalks for manure management. You notice that clinical signs
are most frequent in the growing pigs and evenly distributed
between mild coughing and diarrhea. You elect to humanely
euthanize an acute pig for necropsy evaluation. The lungs have
,no noticeable gross lesions but the liver has numerous bright
white scars. What is the most likely cause of the clinical signs?
a. swine influenza virus
b. porcine reproductive and respiratory disease virus
c. Ascaris suum
d. Salmonella cholerasuis
Finisher daily weight gain = 4.9# Correct Answer Which of the
following values are NOT CORRECT and would not represent
expectations for normal biological performance for the associated
parameter?
a. Nursery starting weight = 12#
b. Nursery daily weight gain = 1.0#
c. Finisher starting weight = 66#
d. Finisher daily weight gain = 4.9#
Animal has both antibodies to the virus and is viremic Correct
Answer Regarding porcine reproductive and respiratory disease
virus (PRRSV) diagnostics in a 100 lb pig, what does a positive
ELISA test result most likely indicate?
a. Animal has both antibodies to the virus and is viremic
b. Animal has been exposed to the virus, mounted a non-
neutralizing antibody response, and current viral status is
unknown
c. Animal is viremic, current antibody status is unknown
d. Animal has been exposed to the virus, mounted a neutralizing
antibody response, and is not viremic
Actinobacillus pleuropneumoniae Correct Answer You are
presented with a case that involves the sudden death of 60 pigs in
a barn of 1000. The owner reports the pigs appeared to be fine
yesterday. The pigs are currently in the finisher phase of
, production and weigh about 155 lbs. You notice that the dead
pigs have blood oozing out of their nose. You decide to post the
first pig and find the lungs to have a multifocal, hemorrhagic,
necrotizing pneumonia. What is the most likely cause?
a. Mannheimia haemolytica
b. Actinobacillus pleuropneumoniae
c. Porcine Reproductive and Respiratory Syndrome (PRRS)
d. Mycoplasma hyopneumoniae
3-6 weeks after the stressor Correct Answer If a boar
experiences an acute stress, when does fertility reach its lowest
level?
a. Immediately after the stressor
b. 1-2 weeks after the stressor
c. 3-6 weeks after the stressor
d. 7-9 weeks after the stressor
Salmonella choleraesuis Correct Answer You are called to
evaluate a group weaned pigs. The producer noted that
yesterday, pigs were huddled in the corner and reluctant to move,
even when he walked through the pen. Today, more pigs are
lethargic, off-feed, and have cyanotic extremities. About 8% of the
pigs are affected, but mortality is high among those with clinical
signs. On your inspection, affected pigs are anorexic, lethargic,
and febrile (105-107°F). Many have ischemic necrosis of ear tips.
You necropsy two pigs; on both, you find splenomegaly,
hepatomegaly, and lymphomegaly, especially of the mesenteric
lymph nodes. Before confirmatory testing, what is your most likely
presumptive diagnosis, based on clinical signs and lesions?
a. Classical swine fever
b. Pseudorabies
c. Salmonella choleraesuis
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