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Journal of Wildlife Diseases, 42(4), 2006, pp. 830-835
© Wildlife Disease Association  2006
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SHORT COMMUNICATION

Infection with a Novel Gammaherpesvirus in Northern Elephant Seals (Mirounga angustirostris)

Tracey Goldstein1,2,5, Linda J. Lowenstine3, Thomas P. Lipscomb4, Jonna A. K. Mazet2, Joseph Novak4, Jeffrey L. Stott3 and Frances M. D. Gulland1

1 The Marine Mammal Center, 1065 Fort Cronkhite, Sausalito, California 94965, USA;
2 University of California Davis School of Veterinary Medicine, Wildlife Health Center, Davis, California 95616, USA;
3 University of California Davis School of Veterinary Medicine, Department of Pathology, Microbiology and Immunology, Davis, California 95616, USA;
4 Armed Forces Institute of Pathology, Department of Veterinary Pathology, Washington D.C. 20306, USA
5 Corresponding author (email: goldsteint{at}tmmc.org)

ABSTRACT:   Twenty juvenile northern elephant seals (Mirounga angustirostris) that died between 1998 and 2004 had ulcers on the tongue, palatine mucosa, and/or tonsils. Histologic examination of the lesions revealed cytoplasmic swelling, nuclear pyknosis, and eosinophilic to amphophilic intranuclear inclusions bodies suggestive of herpesviral infection. Electron microscopic examination and polymerase chain reaction analysis confirmed the presence of a herpesvirus. Subsequent DNA sequencing identified this to be a new gammaherpesvirus that was similar to Porcine lymphotropic virus 2, Alcephaline herpesvirus 1 (malignant catarrhal fever virus from wildebeest), and Chlorocebus rhadinovirus 1 from African green monkeys. Identical herpesviral DNA was also detected in blood and mucosal swabs collected from five healthy elephant seal pups.
  Key words:  Elephant seal, gammaherpes-virus, Mirounga angustirostris, ulcers.






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