QUIZ CORNER

1. A cow recovering from surgery for abomasal displacement develops a rapid, highly irregular heart beat with no apparent change in clinical condition. With what is this arrhythmia most likely associated?

   1. atrial fibrillation

   2. ventricular fibrillation

   3. second-degree atrioventricular block

   4. endocarditis

   5. hypercalcemia

2. A litter of 3-day-old pigs is showing central nervous system signs. Some are ataxic, some are in lateral recumbency and paddling, and some have died. What are the most likely causes of these signs?

   1. edema disease, porcine stress syndrome, pseudorabies

   2. listeriosis, Glasser's disease, Streptococcus suis type II infection

   3. cytomegalovirus infection, pseudorabies, edema disease

   4. Streptococcus suis type II infection, pseudorabies, hypoglycemia

   5. Thiamin deficiency, listeriosis, Glasser's disease

3. What are the predominant clinical signs of equine herpesvirus-1 infection in llamas and alpacas?

   1. deafness and peripheral vestibular disease

   2. blindness and encephalitis

   3. peripheral neuropathy and muscle atrophy

   4. meningitis and transverse myelopathy

   5. cauda equina neuritis and urinary incontinence

4. Cryptorchidectomy is a procedure that can be done in private practice. Concerning evaluation and care of cryptorchidectomy candidates, which statement is least accurate?

   1. Rectal palpation of the ductus deferens entering the vaginal ring means that the testicle has descended at least as far as the inguinal canal.

   2. The treatment of choice for cryptorchidism is castration because the condition is heritable.

   3. A horse with an abdominally retained testicle at birth is unlikely to have the testicle descend later in life.

   4. Conjugated estrogen assays can help to differentiate geldings with stallionlike behavior from cryptorchids.

   5. When a cryptorchidectomy is undertaken, it is prudent to prepare as for any aseptic surgery, including appropriate sterile gowns, drapes, and autoclaved instruments.

5. Toxoplasma gondii is a protozoan parasite that causes abortion in pregnant ewes and goat does. Which 2 of the following recommendations should be included for control of toxoplasmosis on farms where outbreaks have occurred?

   1. vaccinate before breeding and feed tetracyclines during gestation

   2. vaccinate after breeding and reduce the number of feral cats on the premises

   3. restrict access of cats to feed sources, neuter cats on the farm, and feed monensin to pregnant ewes and goat does

   4. cull affected ewes and goat does and eliminate access of cats and birds to feed sources

   5. test and slaughter serologically positive ewes and goat does and vaccinate virgin females before breeding

6. How do the pathologic findings of renal amyloidosis in cats differ from those of renal amyloidosis in dogs?

   1. The amyloid deposits are more severe in cats than in dogs.

   2. The proteinuria is more marked in cats than in dogs.

   3. In cats, the amyloid deposits are medullary, whereas, in dogs, the deposits are glomerular.

   4. The prognosis is better for cats than for dogs.

   5. In cats, renal amyloidosis is usually subclinical, whereas, in dogs, it is usually clinical.

7. A 7-year-old male German shorthaired pointer has had difficulty with prehension of food; the mouth has hung open for the past 3 days. You note atrophy of the muscles of mastication. Other findings of the physical and neurologic examination are normal. What is the most likely cause of these findings?

   1. myositis of the masticatory muscles

   2. granulomatous meningoencephalitis

   3. corticosteroid-responsive meningitis

   4. trigeminal nerve paralysis

   5. acute polyradiculoneuritis

8. A cat is presented to you for evaluation of a coagulation defect. You find that the prothrombin time and partial thromboplastin time are about 2.5 times longer than in control samples. Serum fibrin degradation product values are normal. What is the most likely underlying cause for the hemostatic defect in this cat?

   1. toxicity from an anticoagulant rodenticide

   2. toxicity from a cholecalciferol rodenticide

   3. aspirin intoxication

   4. thrombotic disease caused by antithrombin III deficiency

   5. a hereditary defect

9. Concerning Mycobacterium species, which statement is most accurate?

   1. Mycobacterium bacilli are not stable in the environment.

   2. The intradermal tuberculin test used in chickens also works well in other avian species.

   3. Avian mites are a dangerous vector of avian tuberculosis.

   4. Mycobacterium infection is easily resolved with penicillin therapy.

   5. Birds are susceptible to Mycobacterium avium, Mycobacterium tuberculosis, and Mycobacterium bovis.

10. Which 2 species of coccidia have oocysts of very similar morphology?

    1. Eimeria maxima and Eimeria tenella

    2. Eimeria maxima and Eimeria mitis

    3. Eimeria mitis and Eimeria mivati

    4. Eimeria maxima and Eimeria necatrix

    5. Eimeria tenella and Eimeria mitis

(See p. 81 for answers.)