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Journal of Clinical Microbiology, August 2000, p. 3110-3111, Vol. 38, No. 8
Department of Pathobiology, University of
Connecticut, Storrs, Connecticut 062681;
Connecticut Agricultural Experiment Station, New Haven,
Connecticut 065042; and Department of
Pathology, New York University Medical Center, New York, New York
100163
Received 10 May 2000/Accepted 6 June 2000
West Nile virus was recovered from the brain of a red-tailed hawk
that died in Westchester County, N.Y., in February 2000. Multiple foci
of glial cells, lymphocytes, and a few pyknotic nuclei were observed in
the brain. Three to 4 days after inoculation of Vero cells with brain
homogenates, cytopathic changes were detected. The presence of West
Nile virus antigen in fixed cells or cell lysates was revealed by
fluorescent antibody testing or enzyme-linked immunosorbent assay,
respectively. Furthermore, Reverse transcriptase-PCR with primers
specific for the NS3 gene of West Nile virus resulted in an amplicon of
the expected size (470 bp). Electron microscopy of thin sections of
infected Vero cells revealed the presence of viral particles
approximately 40 nm in diameter, within cytoplasmic vesicles. The
demonstration of infection with the West Nile virus in the dead of the
winter, long after mosquitoes ceased to be active, is significant in
that it testifies to the survival of the virus in the region beyond mosquito season and suggests another route of transmission: in this
case, prey to predator.
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Recovery and Identification of West Nile Virus
from a Hawk in Winter
*
Corresponding author. Mailing address: Department of
Pathobiology, University of Connecticut, 61 N. Eagleville Rd., U-89, Storrs, CT 06269-3089. Phone: (860) 486-0821. Fax: (860) 486-2794. E-mail: Garmendi{at}Uconnvm.Uconn.edu.
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