| outbreak of powassan encephalitis--maine and vermont, 1999-2001. | powassan (pow) virus, a north american tickborne flavivirus related to the eastern hemisphere's tickborne encephalitis viruses, was first isolated from a patient with encephalitis in 1958. during 1958-1998, 27 human pow encephalitis cases were reported from canada and the northeastern united states. during september 1999-july 2001, four maine and vermont residents with encephalitis were found to be infected with pow virus. these persons were tested for other arbovirus infections found in the nor ... | 2001 | 11787585 |
| surveillance for human west nile virus disease - united states, 1999-2008. | west nile virus (wnv) is an arthropod-borne virus (arbovirus) in the family flaviviridae and is the leading cause of arboviral disease in the united states. an estimated 80% of wnv infections are asymptomatic. most symptomatic persons develop an acute systemic febrile illness that often includes headache, myalgia, arthralgia, rash, or gastrointestinal symptoms. less than 1% of infected persons develop neuroinvasive disease, which typically presents as encephalitis, meningitis, or acute flaccid p ... | 2010 | 20360671 |
| seroprevalence of powassan virus in new england deer, 1979-2010. | powassan virus and its subtype, deer tick virus, are closely related tick-borne flaviviruses that circulate in north america. the incidence of human infection by these agents appears to have increased in recent years. to define exposure patterns among white-tailed deer, potentially useful sentinels that are frequently parasitized by ticks, we screened serum samples collected during 1979-2010 in connecticut, maine, and vermont for neutralizing antibody by using a novel recombinant deer tick virus ... | 2013 | 23568288 |