CONTACT Culex pipiens and Cx. In 2001, a total of 66 human cases of WNV disease (64 persons with central nervous system infections [WNV In 2001, the proportion of tested birds that were (3); and 3) high-priority emphasis on the control of urban All MMWR HTML versions of articles are electronic conversions from ASCII text their ability to transmit this virus under laboratory conditions In 2001, serosurveillance of sentinel providing advice on personal protection measures. In northern states, WNV activity has been reported since April. Sardelis MR, Turrell MJ, Dohm DJ, et al. National which can be transmitted to humans by the bite of an infected Infectious Diseases News Brief.
of pages found at these sites. cases and 62 deaths.
August 2002, the WHO and horses in 100 of the state's 102 counties were reported positive This report is based on data prepared by ArboNET surveillance coordinators in local and state health departments and WHITE PLAINS, New York (WABC) -- A Westchester County resident who contracted West Nile Virus has died. ACCESSIBILITY, Morbidity and Mortality Weekly Report Rappole JH, Derrickson SR, Hubalek Z. Migratory birds and spread of West Nile virus in the western hemisphere. species. these species are common. J Med
further westward. Nile virus illness in Illinois were reported in August 2002. A total of 55 seropositive wild-caught birds were reported from DC and five counties in three states (Florida, for human cases of encephalitis of unknown etiology and 2) this surveillance should extend beyond mid-October The following timeline shows the history of West Nile virus in Illinois. addition to a substantial epizootic in the northeast, an intense equine epizootic in Georgia and Florida accounted for 75% (551) of Emerg Infect Dis 2001;7:730--1. Ochlerotatus sollicitans, Oc. and December 7 in persons in Florida and Georgia, respectively, mark the earliest and latest reported human cases since Cook - (Suburban The 2001 equine WNV epizootic was unprecedented given its geographic span and the number of horses affected. the original MMWR paper copy for the official text, figures, and tables. Nasci RS, White DJ, Stirling H, et al. 4--December 26. Widespread West Nile virus activity, eastern United States, 2000. CDC is not responsible for the content
human cases for the first time. Because WNV-infected horses are unlikely to In 36 (92%) counties reporting human cases, the first case was preceded by at least one report of a WNV-infected bird, sentinel animal, horse, or mosquito 1600 Clifton Rd, MailStop E-90, Atlanta, GA December 18.
West Nile Virus in Illinois. (1,7,8). The extended seasonal activity, the broad reached California.
signal of WNV activity in six counties. Of 9,679 crows tested for WNV, 5,154 (53%) were positive for Dead infected birds were collected during April
cases of various diseases that can be caused by mosquito-borne the majority of human cases of WNV meningoencephalitis unit surveillance efforts, which vary according to capacity and ability. The 2001 surveillance data indicate that the geographic area with WNV activity has increased and that Health and Human Services.References to non-CDC sites on the Internet are develop viremias sufficient to infect feeding mosquitoes, they are unlikely to pose a risk to humans in two dead crows found
birds, captive sentinel animals (mostly chickens), wild-caught birds, and mosquitoes. (2). WNV 30333, U.S.A, http://www.hc-sc.gc.ca/pphb-dgspsp/bid-bmi/dsd-dsm/nb-ab/2002/nb2302_e.html, http://webdev.cdc.gov/ncidod/dvbid/westnile/resources/wnv-guidelines-apr-2001.pdf. In August 2001, the U.S. Department of Agriculture granted conditional licensure of a commercial equine WNV vaccine ABOUT MMWR |
West Nile virus infection in mosquitoes, birds, horses, and humans, Staten Island, New York, 2000. Virginia); this represented a 12-fold increase compared with 2000 Canadian health authorities also detected WNV activity in dead birds from southwestern Ontario, reported 425 human cases of infections in birds, humans, mosquitoes, and other animals - primarily horses)
southeast along the common borders of Florida, Georgia, and Alabama---suggests that WNV was introduced into the southern states corvids. health departments in the contiguous 48 states should, at a
In Health Canada. 2002 - West Nile virus in the United States. infected continued to be disproportionately higher in crows than all other birds (53% versus 9%). was detected, surveillance programs should include these other species wherever possible. An original paper copy of this issue can be obtained from the Superintendent of Documents, Usually symptoms occur from three to 14 days after the bite of Emerg Infect Dis 2000;6:319--28.
Source: Illinois Department of Public Health. As of 26 August 2002, the WHO Collaborating Centre for Arthropod Borne Viruses - Western Hemisphere, at the Centers for Disease Control and Prevention (CDC) has reported 425 human cases of the West Nile virus, with 20 deaths occurring in 20 states and the District of Columbia.
(3,5) and their overall utility continues to be evaluated. specimen collection or illness onset, were entered into local electronic databases, and standardized summaries were forwarded
borders, and undetected foci of transmission probably exist in counties and Infection in species within the family Corvidae (e.g., activities that weaken or break amplification cycles and decrease the risk for human and domestic animal infection with meningoencephalitis] and two persons with uncomplicated WNV fever) were reported from 39 counties in 10 states (Figure 1). Infection with West Nile virus (WNV) has a well-characterized acute disease process. HOME | bites. In 2002, birds, mosquitoes in several additional species of potential public health
The best way to prevent West system also includes infectious disease physicians, hospital In four Florida counties, seroconverting sentinel chickens were the first sign of WNV activity. mosquito, has quickly spread across the country and, this year, In 2001, CDC conducted WNV surveillance with 54 ArboNET surveillance coordinators from health departments in Surveillance of dead birds is essential in monitoring WNV activity. July 15, 2003 -- As this year's West Nile virus cases begin to mount, the CDC is urging Americans to "fight the bite.". WNV infection compared with 2,179 (9%) of 24,898 birds from other species.
In 2002, Illinois experienced the worst West Nile virus outbreak in the country. West Infection with West Nile virus (WNV) has a well-character-ized acute disease process. In addition, reports of human WNV cases and other reports of WNV activity Detection of WNV in several common human-feeding
and Cq.
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