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The article presents a case study of a 16-month-old Wagyu heifer calf presented for polydipsia, inappetance, and depression. The cow's physical examination reveals that the heifer calf was hypothermic, bradycardiac, and mentally dull. The heifer calf was treated with Ringer solution intravenously for electrolyte abnormalities and dehydration. The cow expresses clinical deterioration which prompted the owner to choose humane euthanasia. The article discusses suprasellar germ cell tumor.

An immunocompetent animal disease model based on infection with Ehrlichia chaffeensis would facilitate research toward understanding mechanisms responsible for the broad range of clinical signs associated with human monocytic ehrlichiosis (HME). The adaptability of this model for the experimental feeding of tick species and stages and for testing therapies comparable to those for human diseases are additional advantages of large animal models. Herein, we summarize pathology reports for calves that developed fatal disease after experimental inoculation with E. chaffeensis. Elevated liver enzyme levels and lung pathology among these calves corroborated earlier reports of severe HME. Thus, an experimental disease model based on infection of outbred immunocompetent hosts with E. chaffeensis could be within our grasp for the first time. [ABSTRACT FROM AUTHOR]

The article presents a case study of a 2.5-year-old, female llama presented with weight loss and lethargy with 45% packed cell volume (PCV), which rose to 57% after three weeks. Transrectal ultrasonography demonstrated a mass of mixed echogenicity affecting the right ovary, which was eliminated, while granulosa theca cell tumor was histopathological diagnosed. The case was the first ever reported in a llama.

A 28-year-old, female umbrella cockatoo ( Cacatua alba) was evaluated because of lethargy, anorexia, regurgitation, and coelomic swelling of 6 month's duration, which corresponded to cessation of egg laying. Radiographs and ultrasound examination demonstrated extensive deposits of coelomic fat and an enlarged oviduct. Exploratory celiotomy demonstrated copious amounts of firm, nodular fat completely surrounding the gastrointestinal tract, resulting in extensive chronic adhesions between intestinal loops. Free yolk was present in the cranial left coelom, yolk coelomitis was diagnosed, and a salpingohysterectomy was performed. Two days after surgery, the bird stopped passing feces and began regurgitating after eating, and a colonic obstruction was demonstrated via contrast radiography. Euthanasia was elected, and necropsy revealed an obstruction of the distal colon caused by extraluminal compression by adhesions of firm, nodular fat. Histologic examination demonstrated extensive fat necrosis with granulomatous inflammation, characterized by cords of necrotic fat surrounded by multinucleated giant cells and epithelioid macrophages with scattered lymphocytes and plasma cells and rare heterophils. The clinical signs, gross lesions, and histologic lesions are characteristic of massive fat necrosis (lipogranulomatosis) in ruminants and mesenteric panniculitis in humans and companion mammals. This is the first report, to our knowledge, of this disease in psittacine birds. [ABSTRACT FROM AUTHOR]