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Scientists confirm new virus responsible for deaths of transplant recipients in Australia
Date:2/6/2008

February 6, 2008 In the first application of high throughput DNA sequencing technology to investigate an infectious disease outbreak, scientists from Columbia University Mailman School of Public Health, the Victorian Infectious Diseases Reference Laboratory (VIRDL) in Melbourne, Australia, the Centers for Disease Control and 454 Life Sciences link the discovery of a new arenavirus to the deaths of three transplant recipients who received organs from a single donor in Victoria, Australia in April 2007. The full findings are published in the March 2008 issue of the New England Journal of Medicine and are now online.

After failing to implicate an agent using other methods including culture, PCR and viral microarrays, RNA from the transplanted liver and kidneys was analyzed using rapid sequencing technology established by 454 Life Sciences and bioinformatics algorithms developed at Columbia. Examination of tens or thousands of sequences yielded 14 that resembled arenaviruses at the protein level. Thereafter, the team cultured the virus, characterized it by electron microscopy and developed specific molecular and antibody assays for infection. The presence of virus in multiple organs, IgM antibodies in the organ donor and increasing titer of antibody in a recipient were used to implicate the virus as the cause of disease. The arenavirus lymphocytic choriomeningitis virus (LCMV) has been implicated in a small number of cases of disease transmission by organ transplantation, however, the newly discovered virus, which may be a new strain of LCMV, is sufficiently different that it could not be detected using existing screening methods.

High throughput sequencing and methods for cloning nucleic acids of microbial agents directly from clinical samples offer powerful tools for pathogen surveillance and discovery, stated W. Ian Lipkin, MD, John Snow Professor of Epidemiology and Professor of Neurology and Pathology at Columbia University and director o
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Contact: Randee Sacks Levine
rs363@columbia.edu
212-305-8044
Columbia University's Mailman School of Public Health
Source:Eurekalert

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