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Vet Pathol 43:212-218 (2006)
© 2006 American College of Veterinary Pathologists
BRIEF COMMUNICATIONS AND CASE REPORTS

Fatal Poxvirus Outbreak in a Colony of New World Monkeys

K. Mätz-Rensing, H. Ellerbrok, B. Ehlers, G. Pauli, A. Floto, M. Alex, C.-P Czerny and F.-J Kaup

Abstract

An epizootic infection was observed in a colony of 80 New World monkeys consisting of various species including a group of marmosets and Saguinus species. During the summer and autumn of 2002, 30 animals died of unknown diseases. Six animals were sent to the German Primate Center for investigation of the cause of death. A complete pathologic and histologic investigation was carried out. The animals exhibited erosive-ulcerative lesions of the oral mucous membranes. Advanced stages of the disease were characterised by hemorrhagic lesions on the skin distributed randomly over the body, but principally on the face, scrotal region, soles, and palms. Electron microscopy revealed virus particles with orthopox-like morphology within intracytoplasmic inclusions in epithelial cells. The DNA samples from various tissues were analyzed by use of a set of orthopox virus-specific, real-time polymerase chain reaction assays. Amplification products were sequenced to define the virus more precisely. Sequencing confirmed the presence of an orthopox virus. Sequence data indicated that all six animals were infected with the same virus. Propagation of the virus on Vero cells resulted in a rapidly progressive cytopathogenic effect. Preliminary phylogenetic analyses of two genes revealed closest homology to cowpox viruses. The origin of this poxvirus outbreak remains unexplained, and the strain and genus of the virus need to be determined in detail.

Key words: Atypical epizootic; cowpox virus; New World monkeys; pox virus infection.

Request reprints from Dr. K. Mätz-Rensing, German Primate Center, Department of Infectious Pathology, Kellnerweg 4 D-37077 Göttingen (Germany). E-mail: kmaetz{at}gwdg.de.






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