NAVLE ACTUAL EXAM TEST BANK
CONCLUDING REVIEW SHEET PRACTICE
SOLUTION BUNDLED FULLY VERIFIED
ONE HUNDRED PERCENT PASS
GUARANTEED
⩥ A 2-year old nonlactating dairy cow in California has a sudden onset
of head tilt and drooling. The owner also reports that she appears less
active and less interested in feed than normal, and today is circling in
one direction in the pen. You examine her and find T=105F (40.6 C),
HR=96, and RR=32. There is ptosis, drooped ear, and weakness of the
lips on the affected side. You take a lumbosacral spinal tap, and submit
the CSF to your lab. The results show elevated protein and WBCs, with
the cell type being mainly monocytes. The lab reports seeing some gram
positive bacteria in the monocytes of the CSF. Based on these findings
what is the best treatment for this condition?
A - Enrofloxacin
B - Metoclopramide
C - Metronidazole
D - Chloramphenicol
E - Penicillin.
Answer: E
,The diagnosis is Listeriosis. Listeria monocytogenes can effectively be
treated in the early stages of the disease with penicillin, ampicillin, or
tetracycline. Intramuscular procaine penicillin for example has a
withdrawal of 10 days for slaughter (meat) and 48 hours for milk if the
animal is lactating. Other choices of approved antimicrobials would also
likely be effective since L. monocytogenes is susceptible to most
antimicrobials. For a list of approved animal drugs see
www.farad.org/vetgram. FARAD is the United States Food Animal
Residue Avoidance Databank which gives withdrawal information as
well as a list of prohibited drugs. The other drugs listed as choices here
are prohibited and cannot be legally used in food animals in the USA.
⩥ Acquired equine motor neuron disease is a disease characterized by
weight loss, paresis with trembling, preference to lying down, and
decreased activity. Which one of the following choices is associated with
this disease?
A - Vitamin E deficiency
B - Thiamine deficiency
C - Lead toxicosis
D - Organophosphate toxicosis
E - Rickettsial infection.
Answer: A
,Vitamin E deficiency. Acquired equine motor neuron disease uncommon
today due to horse owner awareness. When it occurs, it is usually seen in
older adult horses.
Owners may say that the horse can "walk better than it can stand" when
a horse has acquired equine motor neuron disease. The horse will stand
still trembling in a tucked up stance, but it will walk well (but in short
strides).
⩥ A 2-year old mare presents to you several weeks after recovering from
a mild upper respiratory infection. She now presents with edema and
sloughing of the legs, chest and abdomen as well as mucosal petechial
hemorrhages. She is sore and reluctant to move. Biopsy of the skin
lesion is consistent with aseptic necrotizing vasculitis. What is the most
likely diagnosis?
A - Cantharidin toxicity
B - Idiopathic thrombocytopenia
C - Bastard strangles
D - Type I hypersensitivity
E - Purpura hemorrhagica.
Answer: E
, This is the clinical and histologic appearance of purpura hemorrhagica.
It is a type-III hypersensitivity which is when antigen-antibody
complexes accumulate, leading to disease.
Purpura hemorrhagica most commonly occurs 2-4 weeks after exposure
to certain infectious agents or vaccines. This condition is most
commonly seen subsequent to infection with Streptococcus equi subsp.
equi or vaccination against it but it can also be associated with other
pathogens, particularly respiratory pathogens including other
streptococcal species and equine influenza.
Regardless of the cause, purpura hemorrhagica results from
accumulation of antigen-antibody complexes that deposit on blood
vessel walls and activate a strong immune response (vasculitis). The
leaky blood vessels lead to hemorrhage and edema.
Bastard strangles refers to the condition when Streptococcus equi subsp.
equi creates abscesses in unusual sites (other than the lymph nodes
draining the throat) such as abdominal or lung lymph nodes.
Cantharidin toxicity (also known as blister beetle toxicity) leads to
mucosal irritation and results in colic and cystitis. It can also lead to
hypocalcemia.
CONCLUDING REVIEW SHEET PRACTICE
SOLUTION BUNDLED FULLY VERIFIED
ONE HUNDRED PERCENT PASS
GUARANTEED
⩥ A 2-year old nonlactating dairy cow in California has a sudden onset
of head tilt and drooling. The owner also reports that she appears less
active and less interested in feed than normal, and today is circling in
one direction in the pen. You examine her and find T=105F (40.6 C),
HR=96, and RR=32. There is ptosis, drooped ear, and weakness of the
lips on the affected side. You take a lumbosacral spinal tap, and submit
the CSF to your lab. The results show elevated protein and WBCs, with
the cell type being mainly monocytes. The lab reports seeing some gram
positive bacteria in the monocytes of the CSF. Based on these findings
what is the best treatment for this condition?
A - Enrofloxacin
B - Metoclopramide
C - Metronidazole
D - Chloramphenicol
E - Penicillin.
Answer: E
,The diagnosis is Listeriosis. Listeria monocytogenes can effectively be
treated in the early stages of the disease with penicillin, ampicillin, or
tetracycline. Intramuscular procaine penicillin for example has a
withdrawal of 10 days for slaughter (meat) and 48 hours for milk if the
animal is lactating. Other choices of approved antimicrobials would also
likely be effective since L. monocytogenes is susceptible to most
antimicrobials. For a list of approved animal drugs see
www.farad.org/vetgram. FARAD is the United States Food Animal
Residue Avoidance Databank which gives withdrawal information as
well as a list of prohibited drugs. The other drugs listed as choices here
are prohibited and cannot be legally used in food animals in the USA.
⩥ Acquired equine motor neuron disease is a disease characterized by
weight loss, paresis with trembling, preference to lying down, and
decreased activity. Which one of the following choices is associated with
this disease?
A - Vitamin E deficiency
B - Thiamine deficiency
C - Lead toxicosis
D - Organophosphate toxicosis
E - Rickettsial infection.
Answer: A
,Vitamin E deficiency. Acquired equine motor neuron disease uncommon
today due to horse owner awareness. When it occurs, it is usually seen in
older adult horses.
Owners may say that the horse can "walk better than it can stand" when
a horse has acquired equine motor neuron disease. The horse will stand
still trembling in a tucked up stance, but it will walk well (but in short
strides).
⩥ A 2-year old mare presents to you several weeks after recovering from
a mild upper respiratory infection. She now presents with edema and
sloughing of the legs, chest and abdomen as well as mucosal petechial
hemorrhages. She is sore and reluctant to move. Biopsy of the skin
lesion is consistent with aseptic necrotizing vasculitis. What is the most
likely diagnosis?
A - Cantharidin toxicity
B - Idiopathic thrombocytopenia
C - Bastard strangles
D - Type I hypersensitivity
E - Purpura hemorrhagica.
Answer: E
, This is the clinical and histologic appearance of purpura hemorrhagica.
It is a type-III hypersensitivity which is when antigen-antibody
complexes accumulate, leading to disease.
Purpura hemorrhagica most commonly occurs 2-4 weeks after exposure
to certain infectious agents or vaccines. This condition is most
commonly seen subsequent to infection with Streptococcus equi subsp.
equi or vaccination against it but it can also be associated with other
pathogens, particularly respiratory pathogens including other
streptococcal species and equine influenza.
Regardless of the cause, purpura hemorrhagica results from
accumulation of antigen-antibody complexes that deposit on blood
vessel walls and activate a strong immune response (vasculitis). The
leaky blood vessels lead to hemorrhage and edema.
Bastard strangles refers to the condition when Streptococcus equi subsp.
equi creates abscesses in unusual sites (other than the lymph nodes
draining the throat) such as abdominal or lung lymph nodes.
Cantharidin toxicity (also known as blister beetle toxicity) leads to
mucosal irritation and results in colic and cystitis. It can also lead to
hypocalcemia.
