Humans- Arbovirus Cases in Virginia for 2011

Arboviruses:
WNV – West Nile Virus
EEE – Eastern Equine Encephalitis
LAC – Lacrosse Encephalitis
DEN – Dengue Fever
SLE – St. Louis Encephalitis
POW – Powassan Virus
CHIK – Chikungunya Virus

Location by County/City or Health District

Arbovirus

Number of Cases

Case Status

Illness Onset Date of First Case

Illness Onset Date of Most Recent Case

Deaths

Imported

Alexandria City

WNV

0

Donor-1*

 

 

 

 

Arlington County

WNV

1

Probable

8/30/2011

8/30/2011

 

 

Augusta County

WNV

1

Probable

8/3/2011

8/3/2011

 

 

Dinwiddie County

WNV

0

Donor-1*

 

 

 

 

Fairfax County

WNV

1

Probable-1 Donor-1*

8/31/2011

8/31/2011

 

 

Henrico County

WNV

0

Donor-1*

 

 

 

 

Frederick County

WNV

0

Donor-1*

 

 

 

 

Prince William County

WNV

1

Confirmed

8/18/2011

8/18/2011

 

 

Richmond City

WNV

2

Confirmed

7/3/2011

8/13/2011

 

 

Roanoke City

WNV

1

Confirmed

7/25/2011

7/25/2011

 

 

Roanoke County

WNV

1

Confirmed

8/13/2011

8/13/2011

 

 

Rockingham County

WNV

1

Probable-1 Donor-3*

9/2/2011

9/2/2011

1

 

Virginia Beach City

WNV

0

Donor-1*

 

 

 

 

 

Total Cases WNV

9

 

 

 

 

 

 

 

 

 

 

 

 

 

Wise County

LAC

1

Probable

10/29/2011

10/29/2011

 

 

 

 

 

 

 

 

 

 

Alexandria City

DEN

1

Probable

7/19/2011

7/19/2011

 

Grenada, St. Lucia

Arlington County

DEN

1

Probable

1/6/2011

1/6/2011

 

Bolivia

Fairfax County

DEN

6

Confirmed-1 Probable-5

3/26/2011

8/24/2011

 

Trinidad
Guatemala
Bolivia
El Salvador
Bahamas
Puerto Rico

 

Total Cases DEN

8

 

 

 

 

 

*Nine blood donors tested positive for West Nile Virus in 2011, but none had illness symptoms and none were counted as probable or confirmed cases.

Equines and Other Mammals- Arbovirus Cases in Virginia (WNV and EEE) for 2011


Location by County/City or Health District

Arbovirus

Species

Number Positive

Recovered/Recovering/ Euthanized/Died

Illness Onset Date of First Animal

Illness Onset Date of Last Animal

Clarke County

WNV

Equine

1

Euthanized

8/30/2011

8/30/2011

 

Arboviral Infections in Sentinel Chickens in Virginia for 2011; samples tested for WNV and EEE


Location by County/City or Health District

Total Positive Chickens
EEE

Total Positive
Flocks
EEE

Total Positive Chickens WNV

Total Positive Flocks WNV

Date First Sample Collected
EEE

Date Last Sample Collected
EEE

Date First Sample Collected
WNV

Date Last Sample  Collected
WNV

Chesapeake

2

1

 

 

8/22/2011

9/19/2011

 

 

Norfolk

 

 

1

1

 

 

7/18/2011

7/18/2011

Suffolk

3

2

 

 

7/18/2011

8/29/2011

 

 

Virginia Beach

4

3

3

3

8/15/2011

8/26/2011

8/8/2011

10/10/2011

 

 

 

 

 

 

 

 

 

 

Other Animals- West Nile Virus Cases in Virginia for 2011


Location by County/City or Health District

Arbovirus

Species

Number Positive

Recovered/Recovering/ Euthanized/Died

Illness Onset Date of First Animal

Illness Onset Date of Last Animal

None Reported

 

 

 

 

 

 

 

 

Arboviral Infections in Mosquitoes in Virginia, 2011; pooled mosquitoes tested for WNV and/or EEE


Location by County/City or Health District

Arbovirus
EEE Positive

Arbovirus
WNV Positive

Mosquito Species

EEE
Date First Pool Collected

EEE
Date Last Pool Collected

WNV
Date First Pool Collected

WNV
Date Last Pool Collected

Alexandria City

 

23

Cx. pipiens

 

 

7/11/2011

9/6/2011

 

12

Cx.pipiens/restuans

 

 

8/1/2011

9/12/2011

Fairfax County

 

2

Cx. erraticus

 

 

8/2/2011

8/2/2011

 

114

Cx.pipiens/restuans

 

 

7/6/2011

10/11/2011

 

10

Cx. species

 

 

7/19/2011

10/22/2011

Henrico County

 

2

Ae. albopictus

 

 

8/9/2011

9/15/2011

 

25

Cx.pipiens/restuans

 

 

7/13/2011

10/5/2011

Prince William County

 

12

Cx.pipiens/restuans

 

 

7/8/2011

9/15/2011

Suffolk

1

 

Cs. melanura

10/28/2011

10/28/2011

 

 

Virginia Beach

 

8

Cx.pipiens/restuans

 

 

6/22/2011

9/13/2011

Total Positives

1

208