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2010 Surveillance Data

Surveillance for WNV in BC involves humans, horses, mosquitoes and birds (corvids).
Human testing occurs via blood and organ donations, and through physician requested tests. Horses that present with symptoms are seen by veterinarians and tested by private labs. Mosquitoes are trapped in some regions, and sent in to BCCDC for identification and testing (Culex species only). Lastly in some regions, dead birds belonging to the corvid family (ravens, crows, magpies and jays) are tested at the Animal Health Centre when identified through dead bird reporting.

Surveillance for WNV in BC involves humans, horses, mosquitoes and birds (corvids).

Human testing occurs via blood and organ donations, and through physician requested tests. Horses that present with symptoms are seen by veterinarians and tested by private labs. Mosquitoes are trapped in some regions, and sent in to BCCDC for identification and testing (Culex species only). Lastly in some regions, dead birds belonging to the corvid family (ravens, crows, magpies and jays) are tested at the Animal Health Centre when identified through dead bird reporting.

Updated: on Oct 6¹	Humans²	Mosquito Pools³	Birds
# Tested	325	2,092	233
# Positive	1	0	5

1. Surveillance begins on June 1st.
2. The number of cases includes those classified as probable and confirmed.
3. A mosquito pool may contain up to 50 mosquitoes that are tested at one time.

Canadian Blood Services performs year-round WNV nucleic acid testing and this information is provided as aggregate, regional updates throughout the WNV season to BCCDC. This reporting provides geographic and timely human WNV surveillance data. Between May 31-September 12, 2010 there were 33,687 collections of blood in BC. There were no positive WNV screening test results.