Which of the following is the most common cause of maxillary sinusitis in the horse?
(A) Bacterial lower respiratory tract disease extending into the sinus
(B) Infection and abscessation of a tooth root extending into the sinus
(C) Inhaled foreign bodies lodging in the sinus
(D) Puncture wounds extending into the maxillary sinus - Answers-(B) Infection and
abscessation of a tooth root extending into the sinus
An African gray parrot that is presented for necropsy is suspected to have psittacosis.
Which of the following findings is most likely to confirm the diagnosis?
(A) Hepatomegaly and splenomegaly on gross examination
(B) Identification of the causative organism by Gram's stain
(C) Isolation and identification of Chlamydia psittaci
(D) Presence of acid-fast organisms in the liver - Answers-(C) Isolation and identification
of Chlamydia psittaci
A 5-year-old Holstein cow is being evaluated because of inappetence. On auscultation,
there is pinging over the left ninth and 10th intercostal spaces, on a line between the
tuber coxae and the elbow. On paracentesis immediately ventral to the pinging area,
there are a few drops of green fluid with a pH of 6.0. Which of the following is the most
likely source of the fluid?
(A) Abomasum
(B) Cecum
(C) Omasum
(D) Rumen
(E) Spiral colon - Answers-(D) Rumen
A 3-month-old puppy is being evaluated because of weight loss, chronic diarrhea, and
steatorrhea. Direct microscopic examination of saline smears of the extremely watery
feces shows motile piriform trophozoites. Which of the following is the most appropriate
pharmacotherapy?
(A) Dichlorvos
(B) Ivermectin
(C) Metronidazole
(D) Praziquantel
(E) Trimethoprim-sulfonamide - Answers-(C) Metronidazole
Infection of pregnant cows with bovine viral diarrhea virus may cause which of the
following neurologic abnormalities in the newborn calf?
(A) Anencephaly
(B) Cerebellar hypoplasia
(C) Hydranencephaly
(D) Hydrocephalus
(E) Syringomyelia - Answers-(B) Cerebellar hypoplasia
, A 9-year-old male Boston Terrier dog is found to have a 5-cm mass in the left inguinal
area lateral to the prepuce. Cytologic examination of a fine-needle aspirate shows
numerous round, discrete cells with reddish purple granules. The left inguinal lymph
node is also enlarged. Similar cells are seen in the lymph node and in a blood smear.
Which of the following is the most appropriate management?
(A) Administration of cisplatin and aluminum hydroxide
(B) Administration of levamisole and aspirin
(C) Administration of prednisone and cimetidine
(D) Conventional surgical removal of the mass
(E) Cryosurgical removal of the mass - Answers-(C) Administration of prednisone and
cimetidine
An acute outbreak of vomiting and diarrhea in a litter of 1-week-old piglets is
characterized by a high morbidity and a high mortality rate. Which of the following is the
most likely cause?
(A) Clostridium perfringens type C infection
(B) Colibacillosis
(C) Rotavirus infection
(D) Transmissible gastroenteritis
(E) Vomiting and wasting disease - Answers-(D) Transmissible gastroenteritis
Which of the following abnormal cardiac rhythms is most frequently seen in dogs with
gastric dilatation-volvulus?
(A) Atrial premature complexes
(B) Junctional escape beats
(C) Second-degree atrioventricular block
(D) Sinus bradycardia
(E) Ventricular premature complexes - Answers-(E) Ventricular premature complexes
A goat has a sudden onset of clinical signs of blindness, depression, head pressing, and
anorexia that progress to recumbency with opisthotonos and nystagmus. Which of the
following is the most likely diagnosis?
(A) Bacterial meningitis
(B) Caprine arthritis-encephalitis
(C) Listeriosis
(D) Polioencephalomalacia
(E) Scrapie - Answers-(D) Polioencephalomalacia
A 3-year-old gelding is being evaluated because of mild distress and food reflux from
both nostrils. Rectal temperature is 100.2 F (37.9 C), pulse rate is 42/min, and
respiratory rate is 12 breaths/min. Gastrointestinal borborygmi are present on
examination. Which of the following is the most likely diagnosis?
(A) Cleft palate
(B) Esophageal obstruction
(C) Retropharyngeal abscess
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