Eastern Equine Encephalitis in a Captive Harbor Seal (Phoca vitulina)

作者: Michael P. McBride , Michele A. Sims , Robert W. Cooper , Akinyi C. Nyaoke , Cheryl Cullion

DOI: 10.1638/2008-0021.1

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摘要: Abstract A 31-yr-old male, captive harbor seal (Phoca vitulina) was evaluated for a 48-hr period of anorexia followed by the onset seizures. prolonged seizure failed to respond anticonvulsant therapy and animal euthanized. At necropsy, no significant gross lesions were identified. Reverse transcriptase–polymerase chain reaction testing brain samples positive eastern equine encephalitis virus (EEEV) RNA, serum anti-EEEV antibodies plaque reduction neutralization. Histopathologic evaluation revealed severe multifocal with leptomeningitis, characterized neutrophilic infiltrates in neuropil, neuronal necrosis, satellitosis, neuronophagia, perivascular cuffs lymphocytes, macrophages, neutrophils. Additionally there moderate, multifocal, adrenal cortical necrosis. Immunohistochemical staining EEEV demonstrated viral antigen within necrotic neurons glial cells. Virus isolated from frozen tissue, sequenced ...

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