Translator Disclaimer
1 June 2016 HYDROCEPHALUS IN THREE JUVENILE NORTH AMERICAN BLACK BEARS (URSUS AMERICANUS)
Sylvia H. Ferguson, Janelle Novak, Silke Hecht, Linden E. Craig
Author Affiliations +
Abstract

Hydrocephalus has been reported in a variety of species, including the North American black bear (Ursus americanus). This report describes three cases of hydrocephalus in this species from wild bears aged 3–4 mo considered retrospectively from necropsy records of one institution. Clinical signs included cortical blindness and ataxia. Primary gross findings were doming of the skull, gyri compression and flattening, and lateral ventricle dilation. Two cases had severe bilateral ventricular dilation with loss of the septum pellucidum; atrophy of the surrounding corpus callosum; and bilateral periventricular tears involving the caudate nuclei, internal capsule, and adjacent cerebrum. Histologically, the cases with periventricular tearing had severe axonal loss and degeneration, malacia, hemorrhage, and variable periventricular astrocytosis. All cases were likely congenital, given the bears' age and lack of an apparent acquired obstruction.

Copyright 2016 by American Association of Zoo Veterinarians
Sylvia H. Ferguson, Janelle Novak, Silke Hecht, and Linden E. Craig "HYDROCEPHALUS IN THREE JUVENILE NORTH AMERICAN BLACK BEARS (URSUS AMERICANUS)," Journal of Zoo and Wildlife Medicine 47(2), 632-635, (1 June 2016). https://doi.org/10.1638/2014-0182.1
Received: 23 September 2014; Published: 1 June 2016
JOURNAL ARTICLE
4 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top