1999-2000 Wednesday Slide Conference 27
Diagnoses

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Case 1 Contrib# 99-1240 AFIP# 2674720 Bovine
Morphologic Diagnosis: Cerebral cortex: Neuronal necrosis, laminar and segmental, with fibrinoid vascular necrosis and edema.
Etiology: Hypernatremia.
Disease: Salt poisoning / water deprivation.
 
Case 2 Contrib# TAMU99-1  AFIP# Bovine
Morphologic Diagnosis: Haired skin: Dermatitis, proliferative, chronic-active, focally extensive, severe, with hyperkeratosis, epithelial ballooning degeneration, and eosinophilic intracytoplasmic inclusion bodies.
Etiology: Parapoxvirus (genus Parapoxvirus, family Poxviridae).
Disease: Parapox virus infection (previously undescribed).
 
Case 3 Contrib#  989-4037 AFIP# 2694690 Deer
Immunohistochem Mab89/160.1.5
Case 27-3. This photomicrograph is of the dorsal motor nucleus of the vagus nerve of this deer stained with a monoclonal antibody (Mab 89/160.1.5). The positive red staining is interpreted to be scrapie-associated prion protein or an antigenically similar protein that has been found with chronic wasting disease of deer and elk. (Legend and image from Colorado State University Diagnostic Lab, Ft. Collins, CO, USA and reproduced with permission.)
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Case 27-3. Brain stem. Multifocally, neurons and neuropil contains round clear vacuoles (spongiform degeneration). There is focal perivascular hemorrhage (probably an artifact) and mild gliosis.
Morphologic Diagnosis: Brain stem, medulla oblongata: Neuronal degeneration, vacuolation, and loss, with spongiform change of gray matter neuropil, and astrocytosis, consistent with spongiform encephalopathy.
Etiology: Prion protein (PrP-Sc, scrapie associated prion protein)
Disease: Chronic wasting disease of deer and elk.
 
Case 4 Contrib# 17077-99  AFIP# 2689003 Porcine
Case 27-4. This newborn piglet (note umbilical cord) has multiple, diffusely distributed, slightly raised, reddish-brown epidermal papules.
Morphologic Diagnosis: Haired skin: Dermatitis and folliculitis, necrotizing, subacute, focally extensive, severe, with vasculitis, acanthosis, epithelial ballooning degeneration and eosinophilic intracytoplasmic inclusion bodies.
Etiology: Swine pox virus, (genus Suipoxvirus, family Poxviridae).
Disease: Swine pox

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