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powassan virus: an emerging arbovirus of public health concern in north america.powassan virus (powv, flaviviridae) is the only north american member of the tick-borne encephalitis serogroup of flaviviruses. it is transmitted to small- and medium-sized mammals by ixodes scapularis, ixodes cookei, and several other ixodes tick species. humans become infected with powv during spillover transmission from the natural transmission cycles. in humans, powv is the causative agent of a severe neuroinvasive illness with 50% of survivors displaying long-term neurological sequelae. pow ...201728498740
prevalence and genetic characterization of powassan virus strains infecting ixodes scapularis in connecticut.a total of 30 powassan virus (powv) isolates from ixodes scapularis collected from bridgeport and north branford, ct in 2008, 2010, 2011, and 2012 and one earlier isolate from ixodes cookei collected in old lyme, ct in 1978 were characterized by phylogenetic analysis of their envelope gene sequences. powassan virus sequences segregated into two major groups termed the deer tick virus (dtv) and powassan (pow) lineages. the lineage from i. cookei was pow. the remaining viruses from i. scapularis g ...201222890037
potential role of deer tick virus in powassan encephalitis cases in lyme disease-endemic areas of new york, u.s.a.powassan virus, a member of the tick-borne encephalitis group of flaviviruses, encompasses 2 lineages with separate enzootic cycles. the prototype lineage of powassan virus (powv) is principally maintained between ixodes cookei ticks and the groundhog (marmota momax) or striped skunk (mephitis mephitis), whereas the deer tick virus (dtv) lineage is believed to be maintained between ixodes scapularis ticks and the white-footed mouse (peromyscus leucopus). we report 14 cases of powassan encephalit ...201324274334
molecular epidemiology of powassan virus in north america.powassan virus (pow) is a tick-borne flavivirus distributed in canada, the northern usa and the primorsky region of russia. pow is the only tick-borne flavivirus endemic to the western hemisphere, where it is transmitted mainly between ixodes cookei and groundhogs (marmota monax). deer tick virus (dtv), a genotype of pow that has been frequently isolated from deer ticks (ixodes scapularis), appears to be maintained in an enzootic cycle between these ticks and white-footed mice (peromyscus leucop ...201020631087
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