Black-tailed prairie dogs (Cynomys ludovicianus) are commonly kept in zoological collections, studied in research, and kept as pets. When presented in states of health and illness, evaluation of selected coagulation parameters can aid in assessment of various coagulopathies, as well as other disease processes such as septicemia, vasculitis, and hepatic disease. This study was conducted in order to determine coagulation parameters in captive black-tailed prairie dogs. Sixteen black-tailed prairie dogs (10 males, 6 females) were presented for annual health evaluations. A blood sample was collected from the jugular vein of each prairie dog while under general isoflurane anesthesia, and prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen and fibrin degradation products (FDP) were evaluated using an automated hemostasis analyzer. Results of these tests showed a median PT of 8.4 s and a median APTT of 23.8 s. Median fibrinogen concentration was 343 mg/dL and median FDPs were less than 5 mcg/mL. Almost no published data exists in regard to coagulation parameters in exotic rodents, and limited data can be found for more common laboratory species. New data presented here can promote better physiological understanding and improve clinical management of this rodent species.

A 16-yr-old northern water snake (Nerodia sipedon) presented with a large, firm midcoelomic swelling. A complete blood count, survey radiographs, coelomic ultrasound, and fine needle aspirate of the mass were performed. Survey radiographs revealed a soft tissue opacity mass. Ultrasonographic examination confirmed the presence of the mass but could not aid in its visceral localization. After 2 weeks, the snake presented again because of continued anorexia and poor quality of life. Euthanasia was performed. Gross necropsy revealed a multilobulated mass attached to and effacing the splenopancreas. Histologically, the mass was composed of cuboidal to columnar neoplastic epithelial cells forming tubules surrounded by variable amounts of fibrovascular stroma. Histological examination and immunohistochemical staining of other tissues revealed local invasion in the subserosa and tunica muscularis of the stomach, metastasis within the liver, in the mesovarium, and an intravascular metastasis within the ventricle of the heart surrounded by a thrombus.

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