West Nile Virus Update - January 1, 2001 - December 31, 2001

May 31, 2002 -- Since the last update, Wadsworth Laboratory announced positive results for 16 mosquito pools found in September - October 2001 (Suffolk 16).

Note of clarification: Encephalitis or severe neurologic symptoms may not be present in all lab-positive human, bird, and mammal specimens. A number of birds and mammals with no clinical signs of West Nile infection are tested as asymptomatic surveillance specimens.

Total number of West Nile virus positive specimens for New York for the year: 732 dead birds, 71 live birds, 316 mosquito pools, 22 horses, and 15 humans (2 deaths).

County total West Nile virus positive results for 2001 are:

Dead birds - 732
Counties:      
Albany 14  
Broome 4  
Cattaraugus 1  
Chemung 1  
Dutchess 5  
Erie 1  
Herkimer 2  
Jefferson 2  
Monroe 1  
Nassau 50  
NYC 172 (Bronx 25, Brooklyn 51, Manhattan 13, Queens 31, Staten Island 52)
  Onondaga 28  
  Putnam 1  
  Rockland 153  
  Suffolk 257  
  Ulster 1  
  Westchester 39  
       
Mosquito pools - 316
Counties:      
Nassau 27
NYC 207 (Bronx 15, Brooklyn 23, Manhattan 15, Queens 46, Staten Island 108)
Rockland 7
Suffolk 68
Westchester 7
       
Live birds - 71
Counties:      
NYC 71 (Brooklyn 8, Queens 18, Staten Island 45)
       
Mammal cases - 22
Counties:      
Nassau 4 (Horse)
Orange 1 (Horse)
Suffolk 17 (Horse)
       
Human cases - 15* (2 deaths)
Counties:      
Nassau 4
NYC 9 (Brooklyn 2, Manhattan 3, Queens 2, Staten Island 2)
Suffolk 1

*One case occurred in a non-NYS Department of Health laboratory worker. To protect confidentiality, county of residence is being withheld.