Accession Number : ADA523991


Title :   Rapid Identification of Vector-Borne Flaviviruses by Mass Spectrometry


Descriptive Note : Journal article


Corporate Author : ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD


Personal Author(s) : Grant-Klein, Rebecca J ; Baldwin, Carson D ; Turell, Michael J ; Rossi, Cynthia A ; Li, Feng ; Lovari, Robert ; Crowder, Chris D ; Matthews, Heather E ; Rounds, Megan A ; Eshoo, Mark W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a523991.pdf


Report Date : Feb 2010


Pagination or Media Count : 13


Abstract : Flaviviruses are a highly diverse group of RNA viruses classified within the genus Flavivirus, family Flaviviridae. Most flaviviruses are arthropod-borne, requiring a mosquito or tick vector. Several flaviviruses are highly pathogenic to humans; however, their high genetic diversity and immunological relatedness makes them extremely challenging to diagnose. In this study, we developed and evaluated a broad-range Flavivirus assay designed to detect both tick- and mosquito-borne flaviviruses by using RT-PCR/electrospray ionization mass spectrometry (RT-PCR/ESI-MS) on the Ibis T5000 platform. The assay was evaluated with a panel of 13 different flaviviruses. All samples were correctly identified to the species level. To determine the limit of detection for the mosquito-borne primer sets, serial dilutions of RNA from West Nile virus (WNV) were assayed and could be detected down to an equivalent viral titer of 0.2 plaque-forming units/mL. Analysis of flaviviruses in their natural biological background included testing Aedes aegypti mosquitoes that were laboratory-infected with dengue-1 virus. The assay accurately identified the virus within infected mosquitoes, and we determined the average viral genome per mosquito to be 2.0 106. Using human blood, serum, and urine spiked with WNV and mouse blood and brain tissues from Karshi virus-infected mice, we showed that these clinical matrices did not inhibit the detection of these viruses. Finally, we used the assay to test field-collected Ixodes scapularis ticks collected from sites in New York and Connecticut. We found 16/322 (5% infection rate) ticks positive for deer tick virus, a subtype of Powassan virus. In summary, we developed a single high-throughput Flavivirus assay that could detect multiple tick- and mosquito-borne flaviviruses and thus provides a new analytical tool for their medical diagnosis and epidemi


Descriptors :   *VIRUSES , *GROUP B ARBOVIRUSES , *DISEASE VECTORS , *WEST NILE VIRUS , BRAIN , REPRINTS , CHROMOSOMES , IDENTIFICATION , DIAGNOSIS(MEDICINE) , SAMPLING , GENES , MASS SPECTROMETRY , TICKS , RIBONUCLEIC ACIDS , GENETICS , BLOOD , URINE , AEDES , CULICIDAE , BIOLOGY , DETECTION , TISSUES(BIOLOGY) , HUMANS


Subject Categories : Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE