Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/97771
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Type: Journal article
Title: Comparative neuropathology of ovine enterotoxemia produced by clostridium perfringens type D wild-type strain CN1020 and Its genetically modified derivatives
Author: Garcia, J.
Giannitti, F.
Finnie, J.
Manavis, J.
Beingesser, J.
Adams, V.
Rood, J.
Uzal, F.
Citation: Veterinary Pathology, 2015; 52(3):465-475
Publisher: SAGE Publications
Issue Date: 2015
ISSN: 1544-2217
1544-2217
Statement of
Responsibility: 
J. P. Garcia, F. Giannitti, J. W. Finnie, J. Manavis, J. Beingesser, V. Adams, J. I. Rood, and F. A. Uzal
Abstract: Clostridium perfringens type D causes enterotoxemia in sheep and goats. The disease is mediated by epsilon toxin (ETX), which affects the cerebrovascular endothelium, increasing vascular permeability and leading to cerebral edema. In the present study, we compared the distribution and severity of the cerebrovascular changes induced in lambs by C. perfringens type D strain CN1020, its isogenic etx null mutant, and the ETX-producing complemented mutant. We also applied histochemical and immunohistochemical markers to further characterize the brain lesions induced by ETX. Both ETX-producing strains induced extensive cerebrovascular damage that did not differ significantly between each other in nature, neuroanatomic distribution, or severity. By contrast, lambs inoculated with the etx mutant or sterile, nontoxic culture medium did not develop detectable brain lesions, confirming that the neuropathologic effects observed in these infections are dependent on ETX production. Lambs treated with the wild-type and complemented strains showed perivascular and mural vascular edema, as well as serum albumin extravasation, particularly severe in the cerebral white matter, midbrain, medulla oblongata, and cerebellum. Brains of animals inoculated with the ETX-producing strains showed decreased expression of glial fibrillary acidic protein and increased expression of aquaporin-4 in the end-feet processes of the astrocytes around blood vessels. Early axonal injury was demonstrated with anti-amyloid precursor protein immunohistochemistry. Perivascular accumulation of macrophages/microglia with intracytoplasmic albumin globules was also observed in these animals. This study demonstrates that ETX is responsible for the major cerebrovascular changes in C. perfringens type D-induced disease.
Keywords: aquaporin; axonal injury; brain; Clostridium perfringens type D; mutants; edema; enterotoxemia; epsilon toxin
Rights: © The Author(s) 2014
RMID: 0030022492
DOI: 10.1177/0300985814540543
Appears in Collections:Pathology publications

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