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Weekly Update: West Nile Virus Activity ---United States, September
26--October 2, 2001
The following report summarizes West Nile virus (WNV) surveillance data
reported to CDC through ArboNET and verified by states and other jurisdictions as of October
2, 2001.
During the week of September 26--October 2, five human cases of
WNV
encephalitis were reported in Connecticut (two) and New Jersey (three); no
deaths were reported. During the same period, WNV infections were reported in 539
crows, 239 other birds, and 19 horses. A total of 52 WNV-positive mosquito pools
were reported in four states (Connecticut, Massachusetts, New Jersey, and Ohio).
During 2001, 25 human cases of WNV encephalitis have been reported in New
York (six), Connecticut (five), Maryland (five), Florida (four), New Jersey (four), and
Georgia (one); one death occurred in Georgia. A total of 3,060 crows and 1,191 other birds
with WNV infection were reported from 23 states and the District of Columbia (Figure 1); 108 WNV infections in other animals (all horses) were reported from 11
states (Alabama, Connecticut, Florida, Georgia, Kentucky, Louisiana,
Massachusetts, Mississippi, New York, Pennsylvania, and Virginia); and 620 WNV-positive
mosquito pools were reported from 12 states (Connecticut, Florida, Georgia, Illinois,
Maryland, Massachusetts, New Hampshire, New Jersey, New York, Ohio, Pennsylvania,
and Rhode Island).
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