West Nile Virus (WNV) Update - January 1, 2011 - December 31, 2011

February 9th, 2012 -- The New York State Department of Health Wadsworth Center Arbovirus Laboratory reported a WNV-positive result for one mosquito pool (Onondaga - collected in August 2011).

Total number of WNV positive specimens for the year:
44 humans, 453 mosquito pools,
4 horses, 1 cow, 1 dog.
County Human1 Equine Mosquito Other
Albany 1(0) 0 0 0
Allegany 0 0 0 0
Broome 1(0) 0 0 0
Cattaraugus 0 0 0 0
Cayuga 0 0 0 0
Chautauqua 0 0 0 0
Chemung 0 0 0 0
Chenango 0 0 0 0
Clinton 0 0 0 0
Columbia 0 0 0 0
Cortland 0 1 0 0
Delaware 0 0 0 0
Dutchess 0 0 0 0
Erie 3(0) 0 28 0
Essex 0 0 0 0
Franklin 0 0 0 0
Fulton 0 0 0 0
Genesee 0 0 0 0
Greene 0 0 0 0
Hamilton 0 0 0 0
Herkimer 0 0 0 0
Jefferson 0 0 0 0
Lewis 0 0 1 0
Livingston 0 0 0 0
Madison 0 0 2 0
Monroe 0 0 0 0
Montgomery 0 0 0 0
Nassau 16(1) 0 29 0
Niagara 0 0 0 0
Oneida 0 0 2 0
Onondaga 2(0) 0 17 0
Ontario 0 1 0 0
Orange 0 0 1 0
Orleans 0 0 0 0
Oswego 0 0 7 0
Otsego 0 0 0 0
Putnam 1(0) 0 0 0
Rensselaer 0 2 0 12
Rockland 0 0 72 0
Saratoga 0 0 0 0
Schenectady 0 0 0 0
Schoharie 0 0 0 0
Schuyler 0 0 0 0
Seneca 0 0 0 0
St. Lawrence 0 0 0 0
Steuben 0 0 0 0
Suffolk 4(0) 0 81 0
Sullivan 0 0 0 0
Tioga 0 0 0 13
Tompkins 1(0) 0 0 0
Ulster 0 0 0 0
Warren 0 0 0 0
Washington 1(0) 0 0 0
Wayne 0 0 0 0
Westchester 3(0) 0 32 0
Wyoming 0 0 0 0
Yates 0 0 0 0
NYS - Excluding NYC (Total) 33(1) 4 272 2
Bronx (NYC) 2(0) 0 9 0
Brooklyn (NYC) 2(0) 0 30 0
Manhattan (NYC) 2(0) 0 1 0
Queens (NYC) 5(1) 0 89 0
Staten Island (NYC) 0 0 52 0
New York City (Total) 11(1) 0 181 0
New York State (Total) 44(2) 4 453 2
  • 1 Number in parentheses indicates number of deaths
  • 2 WNV-positive dog
  • 3 WNV-positive cow

Notes of clarification:

  • Not all animals testing positive are necessarily ill or symptomatic of WNV infection. Some specimens are tested only for surveillance purposes. WNV-positive birds are not listed.