West Nile Virus (WNV) Update - January 1, 2009 - December 31, 2009

January 26th, 2010 -- The New York City Department of Health and Mental Hygiene reprted a WNV-positive result for one human (Bronx).

Total number of WNV positive specimens for the year:
7 humans (0 deaths), 1 horse, and 100 mosquito pools.
County Humans1 Horses Mosquito Pools Other2
Albany 0 0 0 0
Allegany 0 0 0 0
Broome 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 0 0 0
Delaware 0 0 0 0
Dutchess 0 0 0 0
Erie 0 0 2 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 0 0
Livingston 0 0 0 0
Madison 0 0 0 0
Monroe 13(0) 0 0 0
Montgomery 0 0 0 0
Nassau 0 0 18 0
Niagara 1(0) 0 0 0
Oneida 0 0 0 0
Onondaga 0 0 1 0
Ontario 0 0 0 0
Orange 1(0) 0 0 0
Orleans 0 0 0 0
Oswego 0 0 0 0
Otsego 0 0 0 0
Putnam 0 0 0 0
Rensselaer 0 0 0 0
Rockland 0 0 16 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 1(0) 0 17 0
Sullivan 0 1 0 0
Tioga 0 0 0 0
Tompkins 0 0 0 0
Ulster 0 0 0 0
Warren 0 0 0 0
Washington 0 0 0 0
Wayne 0 0 0 0
Westchester 0 0 6 0
Wyoming 0 0 0 0
Yates 0 0 0 0
NYS - Excluding NYC (Total) 4(0) 1 60 0
Bronx (NYC) 1 0 7 0
Brooklyn (NYC) 1(0) 0 8 0
Manhattan (NYC) 0 0 6 0
Queens (NYC) 1(0) 0 17 0
Staten Island (NYC) 0 0 2 0
New York City (Total) 3(0) 0 40 0
New York State (Total) 7(0) 1 100 0
  • 1 Number in parentheses indicates number of deaths.
  • 2 WNV-positive birds are not listed.
  • 3 Infection likely acquired out of state.

Notes of clarification:

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