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	va1-sg19016.securesites.net

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Human cases were reported for week 34 (as of 25 Aug 2007) from the 

Province / Neurological / Non-Neurological / Unclassified-Unspecified

/ Total* / Asymptomatic**

Ontario / 1 / 2 / 0 / 3 / 1

Manitoba / 18 / 68 / 263  / 349 / 3

Saskatchewan / 6 / 44 / 589 / 638 / 6

Alberta / 11 / 132 / 0 / 143 / 5

British Columbia / 1 / 3 / 0 / 4*** / 0

TOTALS / 36 / 249 / 852 / 1137 / 13

* Neurological syndrome (plus) Non-Neurological syndrome (plus) 

Unclassified-Unspecified (equals) Total

** Most identified through blood donor testing; not included in total cases

*** Infection acquired while traveling outside the province



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Of the 7 provinces testing dead wild birds for West Nile virus as of 

Province / crows / Blue Jays / Bl.-billed magpies / Comm. Raven / Other

Atlantic Region* / 0 of 327** / 0 of 24 / 0 of 0 / 0 of 34 / 0 of 1

Ontario / 47 of 435 / 0 of 143 / 0 of 0 / 0 of 46 / 0 of 0

Western Region *** / 40 of 632 / 0 of 4 / 5 of 19 / 0 of 14 / 15 of 24

* New Brunswick, Nova Scotia, Prince Edward Island

** Positive of total tested

*** Manitoba, Saskatchewan, Alberta, British Columbia



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of Vector-Borne Infectious Diseases, West Nile virus [edited]





2007 West Nile virus activity in the United States (through 28 Aug 2007)

-----------------------------------------------

State / Neuroinvasion* / *West Nile* fever** / Other, Unspecified***

/ Total **** / Fatalities

Alabama / 6 / 2 / 0 / 8 / 1

Arizona / 10 / 4 / 2 / 16 / 0

Arkansas / 3 / 0 / 0 / 3 / 1

California / 55 / 80 / 12 / 147 / 7

Colorado / 10 / 62 / 0 / 72 / 1

Connecticut / 2 / 1 / 0 / 3 / 0

Florida / 3 / 0 / 0 / 3 / 1

Georgia / 4 / 4 / 1 / 9 / 0

Idaho / 1 / 23 / 0 / 24 / 0

Illinois / 8 / 2 / 1 / 11 / 1

Iowa / 1 / 4 / 0 / 5 / 0

Kansas / 3 / 3 / 0 / 6 / 0

Kentucky / 1 / 0 / 0 / 1 / 0

Louisiana / 1 / 1 / 0 / 2 / 0

Maryland / 0 / 0 / 1 / 1 /0

Minnesota / 11 / 21 / 0 / 32 / 0

Mississippi / 13 / 19 / 0 / 32 / 1

Missouri / 2 / 3 / 0 / 5 / 0

Montana / 15 / 22 / 0 / 37 / 1

Nebraska / 2 / 36 / 0 / 38 / 1

Nevada / 1 / 2 / 0 / 3 / 0

New Mexico / 8 / 6 / 0 / 14 / 0

North Dakota / 8 / 55 / 0 / 63 / 1

Ohio / 1 / 0 / 0 / 1 / 0

Oklahoma / 7 / 6 / 0 / 13 / 1

Oregon / 1 / 2 / 0 / 3 / 0

Pennsylvania / 1 / 0 / 0 / 1 / 0

South Dakota / 25 / 56 / 0 / 81 / 3

Texas / 11 / 7 / 0 / 18 / 0

Utah / 3 / 3 / 0 / 6 / 0

Virginia / 1 / 0 / 0 / 1 / 0

Wyoming / 6 / 70 / 6 / 82 / 1

TOTALS / 224 / 494 / 23 / 741 / 21



* cases with neurological manifestations (such as WN encephalitis, 

meningitis*, and myelitis)

** cases with no evidence of neuroinvasion

*** cases for which insufficient clinical information was provided

**** total number of human cases of WNV illness reported to ArboNET 

by state and local health departments.



"Neuroinvasive disease" refers to severe disease cases, particularly 

West Nile meningitis and West Nile encephalitis.



"West Nile fever" refers to typically less severe cases that show no 

evidence of neuroinvasion. West Nile fever is not currently on the 

list of nationally notifiable diseases, and, therefore, it is 

optional whether or not state health departments report these cases 

to CDC. [Further explanations of neuroinvasive West Nile virus 

disease and West Nile fever can be found on the CDC website at the

URL provided above].



"Other" includes persons with clinical manifestations other than WN 

fever, WN encephalitis, or WN meningitis, such as acute flaccid paralysis.



"Unspecified" cases are those for which sufficient clinical

information was not provided.



and severe human disease cases occurring since 1 Jan 2007, reported 

to ArboNET by state and local health departments. ArboNET is the 

national electronic surveillance system established by CDC to assist 

states in tracking West Nile virus and other mosquito-borne viruses. 

Information regarding 2007 virus/disease activity is posted when such 

cases are reported to CDC.



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virus [edited]





2007 West Nile virus activity in the United States (through 28 Aug 2007)

-----------------------------------------------

Data are being collected from state and local health departments on a 

weekly basis and are reported to the CDC ArboNET for the following 5 

veterinary cases, and mosquito surveillance. Maps detailing 

county-level wild birds, sentinel chicken flocks, human cases, 

veterinary cases, and mosquito surveillance data are published each 

week on the collaborative USGS (US Geological Survey)/CDC West Nile 

virus website.



As of 28 Aug 2007, human, avian, animal, or mosquito West Nile virus 

(WNV) infections have been reported to CDC ArboNET from the following 

Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, 

Iowa, Kansas, Kentucky, Louisiana, Maeyland, Massachusetts, Michigan, 

Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New 

Jersey, New Mexico, New York, North Dakota, Ohio, Oklahoma, Oregon, 

Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, 

Virginia, West Virginia, Wisconsin, and Wyoming; Commonwealth of Puerto Rico.



WNV antibody-positive sentinel animals (birds and/or horses) have 

been found in Arizona, California, Florida, Iowa, North Dakota, 

sentinel programs. - Mods.JW/TY]



WNV equine infections have been reported from Arizona, California, 

Colorado, Idaho, Iowa, Kansas, Louisiana, Minnesota, Mississippi, 

Missouri,  Montana, New Mexico, North Dakota, Oklahoma, Oregon, South 

Dakota, Tennessee, Texas,  Utah, Virginia and Washington.



WNV has been detected in dead wild birds in Alabama, Arizona, 

Arkansas, California, Colorado, Delaware, Georgia, Idaho, Illinois, 

Indiana,  Massachusetts, Michigan, Mississippi, Nebraska, Nevada, New 

Jersey,  New York, North Dakota, Ohio, Oregon, South Carolina, 

Tennessee,  Texas, Utah, and Wisconsin.



WNV has been detected in mosquito pools collected in  Arizona, 

Arkansas, California, Colorado, Connecticut, Georgia, Idaho, 

Illinois, Indiana, Iowa, Louisiana, Massachusetts, Michigan, 

Minnesota, Mississippi, Missouri, Nebraska, Nevada, New Jersey, New 

Mexico, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South 

Dakota, Tennessee, Texas, Utah, Virginia, West Virginia, and Wyoming.



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A dead crow found in Brattleboro VT was confirmed to be a carrier of 

West Nile Virus Friday by the Vermont Department of Health. The bird, 

which was turned over to the department 13 Aug [2007] and tested 

positive on Aug. 29, is the first confirmed case of the virus in 

Vermont this year.



Last year [2006], 9 birds tested positive, though none were found in 

Windham County. In 2004, one bird found in the county tested 

positive. This was down from 25 reported cases in Windham County in 

2003, one of which was a human.



So far this year [2007], the health department has received 279 dead 

bird reports. The state tests dead birds, traps and tests mosquitoes 

and tests people and horses that have symptoms consistent with the virus.



The health department tests crows, robins, jays, ravens, osprey, 

hawks, owls, falcons, vultures and eagles for West Nile virus. These 

bird species are the most important for indicating the presence of 

West Nile virus in Vermont.



[Byline Bob Audette]



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[It would be interesting to see the denominators for each species of 

bird tested.  I wonder if the majority were crows, and the minority 

were raptors.  To be of maximum usefulness for surveillance, the 

turn-round time for testing needs to be as short as possible. - Mod.JW]



2006

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