Many hens in a large backyard flock recently became ill after the owner purchased four new chickens. The sick hens are gasping, coughing and sneezing. They have poor appetite and act depressed. Some affected birds have watery green diarrhea and swelling of the head

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Which type of immune reaction is occurring in this picture of a horse with limb edema secondary to a localized vasculitis?

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Which one of the following organisms causes Tyzzer disease?

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An emaciated cow is presented. She appears weak and anorexic, with enlarged superficial cervical lymph nodes.

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During the fall, a 12-pound, five-year-old neutered male cat from New Mexico is presented with a draining abscess. He also has a two-day history of lethargy, depression, runny eyes, decreasing appetite and intermittent vomiting and diarrhea. He is an indoor/outdoor cat, up-to-date on vaccines. He has a marked unilateral submandibular lymphadenopathy on the same side as the ruptured abscess. A swab of the draining tract reveals microorganisms with a bipolar-staining "safety pin" appearance using both Giemsa and Wright stain.

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What tumor type is a cat predisposed to developing at vaccination sites

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A 6-year old Sun Conure presents for evaluation of a skin lesion. The owner reports that the bird is very sensitive on the wing near the lesion. On your exam, you note an oval swelling involving the feather follicle as seen in the image below. What is the best treatment for

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An alpaca is presented in poor body condition with an unkempt coat, patchy alopecia and severe pruritus and crusting of the extremities.What is the most appropriate diagnostic

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