VIRGINIA MOSQUITO CONTROL ASSOCIATION
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UPDATE: WEST NILE VIRUS CASES in VIRGINIA for 2003
HUMAN CASES: 27 cases onset late July to late September. 1 fatal case in Staunton.
HORSES: 232 from 60 localities, 55 died or were euthanized, 45 are recovering, the outcome of 132 unknown.
BIRDS: 1,042 positive Birds, 761 Crows, 209 Blue Jays, 53 Raptors and 19 Others.
SENTINEL CHICKENS: 48 chickens tested positive in Tidewater area.
MOSQUITO POOLS: 436 total positive pools. 294 Culex pipiens, 72 Culex restuans, 24 Culiseta melanura, 22 Culex salinarius, 18 Culex species, 4 Aedes albopictus, 1 Aedes vexans, and 1 Culex erraticus.
OTHER ANIMALS: None or not reported ?
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ATTENTION !!!
***FOR THE 2003 CASES OF WEST NILE VIRUS and EASTERN EQUINE ENCEPHALITIS go to the TABLE OF CONTENTS and select OTHER MOSQUITO CONTROL ORGANIZATIONS and then click on VIRGINIA DEPARTMENT OF HEALTH
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UPDATE: WEST NILE VIRUS CASES in VIRGINIA for 2002
HUMAN CASES: 27 cases with 2 deaths onset dates 7/20 to 9/26/02
HORSES: 45 cases, 28 recovered, 17 died or was euthanized, onset dates 7/29 to 10/13/02
BIRDS: 913 positives ( 735 crows, 150 blue jays, 22 raptors, 6 others ) dates found 4/8 to 11/1/02
OTHER ANIMALS: 4 gray squirrels died or was euthanized. onset dates 9/7 to 9/8/02
MOSQUITO POOLS: 180 positive pools collected from 7/10 to 9/11/02. The positive species were: 7 Aedes albopictus, 132 Culex pipiens, 8 Culex restuans, 1 Culex salinarius and 32 Culex species. Collection dates 7/10 to 9/11/02.
* Above information is from the Virginia Department of Health
* Detail information can be found on the Virginia Department of Health's WebSite...connect on our Link Page.
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WEST NILE VIRUS CASES in VIRGINIA for 2001
HUMAN CASES: No human cases reported in 2001.
HORSES: There were 6 positive horses. the onset dates were 8/16 to 11/04/01
BIRDS: 215 positive birds ( 211 crows and 4 Blue Jays) dates found 7/15 to 11/7/01
MOSQUITOES: 1 positive pool collected in City of Suffolk on 9/11/01. The positive pool was Culiseta melanura.
| St. Louis Encephalitis |
Eastern Equine Encephalitis |
LaCrosse Encephalitis |
|||||
|---|---|---|---|---|---|---|---|
| Year Reported | Cases | Location | Onset | Location | Onset | Location | Onset |
| 1975 | 3 | Rockingham Co. | 10/11/1975 | 2 in Accomack Co. | 10/15-10/20/1975 | ||
| 1976 | 3 | Henrico County | 08/09/1976 | ||||
| 2 in Richmond City | 09/15-9/27/1976 | ||||||
| 1977 | 1 | Richmond City | 09/15/1977 | ||||
| 1987 | 1 | Hanover Co. | 7/21/1987 | ||||
| 1990 | 2 | Alington Co. | 10/18/1990 | Henrico Co. | 9/13/1990 | ||
| 1994 | 1 | Tazewell Co. | 10/7/1994 | ||||
| 1995 | 1 | Tazewell Co. | 8/29/1995 | ||||
| 1996 | 2 | 2 in Tazewell Co. | 8/28-9/16/1996 | ||||
| 1997 | 7 | Colonial Heights | 9/2/1997 | Tazewell Co. | 8/18/1997 | ||
| 5 in Wise Co. | 8/1-9/8/1997 | ||||||
| 1998 | 1 | Portsmouth | 8/10/1998 (fatal) | ||||
| 2000 | 1 | Tazewell Co. serum acute Igm | onset 7/17/00 | ||||
| 2003 | 5 | Gloucester Co | (fatal) | 2 in Staunton | 8/11/03 | ||
| 2 in Tazewell Co. | 7/29/03 | ||||||
| Year Reported | Cases | Information |
|---|---|---|
| 1992 | 8 | No Data |
| 1993 | 2 | Incomplete Data |
| 1994 | 1 | Incomplete Data |
| 1995 | 0 | No Data |
| 1996 | 1 | Incomplete Data |
| 1997 | 0 | No Data |
| 1998 | 0 | No Data |
| 1999 | 1 | in Chesapeake |
| 2000 | 4 | City of Suffolk 7/12/00 confirmed 7/21/00 histology 8/1/00 confirmed 8/2/00 confirmed |
| 2000 | 3 | City of Chesapeake 7/14/00 histology 7/23/00 confirmed 7/24/00 confirmed |
| 2000 | 1 | Prince George County 7/31/00 confirmed |
| 2000 | 1 | Mathews county 11/1/00 confirmed |
| 2003 | 7 | Chesapeake, Halifax (2), Suffolk, Madison, Pittsylvania, and Powatan. |
2003 - Eight Emus died in Stafford - one was diagnosed with EEE
MOSQUITO POOLS THAT TESTED POSITIVE FOR EEE
| YEAR REPORTED | WEEK | LOCATION | SPECIES | CONFIRMED |
| 2000 | 26 (6/27/00) | City of Chesapeake | Culiseta melanura | PCR positive |
| 2000 | 28 (7/13/00) | City of Chesapeake | Culiseta melanura | PCR positive |
| 2000 | 29 (7/21/00) | City of Norfolk | Anopheles crucians | PCR positive |
| 2000 | 31 (8/2/00) | City of Chesapeake | Culiseta melanura | PCR positive |
| 2003 | early June - September | Chesapeake | 18 Culiseta melanura & 1 Culex salinarius | |
| 2003 | July | Hampton | 3 Culiseta melanura | |
| 2003 | 8/16/03 | Isle of Wight | 1 Culiseta melanura | |
| 2003 | 7/1 - 8/5/03 | Norfolk | 7 Culiseta melanura | |
| 2003 | 7/1 - 7/29/03 | Suffolk | 10 Culiseta melanura | |
| 2003 | 7/22/03 | Virginia Beach | 1 Culiseta melanura |
SENTINEL CHICKENS that tested positive for EEE
| YEAR | WEEK | LOCATION | Number of Cases | CONFIRMATION |
| 2000 | 30 (7/26/00) | City of Norfolk | three | EIA IgM positive |
| 2000 | 30 (7/27/00) | City of Chesapeake | one | EIA IgM positive |
| 2000 | 33 (8/15/00) | City Virginia Beach | one | EIA IgM positive |
| 2000 | 33 (8/16/00) | City of Chesapeake | one | EIA Igm positive |
| 2000 | (10/24/00) | City of Norfolk | one SPARROW | PCR confirmed |
| 2003 | 6/9 - 8/5/03 | CHESAPEAKE | 20 | |
| 2003 | July | Virginia Beach | 6 |
WEST NILE VIRUS
| YEAR and WEEK | LOCATION | SPECIES/ORGANISM | Number of Cases | Confirmation |
| 2000 week 41 (9/28/00) | Prince Edward County near Farmville | one dead crow | one | PCR positive |
| 2000 (10/3/00) | Alexandria City | Crow, American | one | PCR confirmed |
| 2000 (10/30/00) | Spotsylvania Co. | Crow, American | one | PCR positive |
| 2000 (10/20/00) | Fairfax Co. | Crow, American | one | PCR positive |
| 2000 (10/11/00) | Hampton City | Crow, American | one | PCR positive |
| 2000 (10/17/00) | Hanover Co. | Crow, American | one | PCR positive |
| 2000 (10/19/00) | Powhatan Co. | Crow, American | one | PCR positive |
BIRDS: West Nile Virus Positive in Virginia for 2001
| Location by County or City | Number Positive | Kind of Bird | Date 1st Bird found | Date most recent Bird found |
| Albemarle/Charlottesville | 2 | Crow | 9/5/01 | 9/28/01 |
| Alexandria City | 62 | Crow 61 Blue Jay 1 | 7/15/01 | 10/13/01 |
| Arlington Co. | 37 | Crow | 8/14/01 | 12/14/01 |
| Chesapeake City | 8 | Crow 6 Blue Jay 2 | 9/10/01 | 10/22/01 |
| Clarke Co. | 1 | Crow | 10/3/01 | 10/3/01 |
| Fairfax Co. | 54 | Crow 53 Blue Jay 1 | 8/23/01 | 10/26/01 |
| Frederick Co. | 1 | Crow | 10/15/01 | |
| Gloucester Co. | 1 | Crow | 10/1/01 | |
| Henrico Co. | 1 | Crow | 9/23/01 | |
| King William Co. | 1 | Crow | 10/01/01 | |
| Loudoun Co. | 4 | Crow | 9/18/01 | 10/9/01 |
| Louisa Co. | 1 | Crow | 10/8/01 | |
| Newport News City | 3 | Crow | 9/16/01 | 11/7/01 |
| Portsmouth City | 6 | Crow | 8/26/01 | 10/31/01 |
| Prince William Co. | 11 | Crow | 8/29/01 | 10/2/01 |
| Richmond City | 1 | Crow | 10/01/01 | |
| Stafford Co. | 1 | Crow | 10/6/01 | |
| Suffolk City | 16 | Crow | 7/28/01 | 10/5/01 |
| Virginia Beach City | 4 | Crow | 9/6/01 | 10/8/01 |
| TOTAL: | 215 | Crow 211 Blue Jay 4 | 7/15/01 | 12/14/01 |
MOSQUITO POOLS: West Nile Virus Positive in Virginia for 2001
| Location of collection | Positive Pools | Species | Date collected |
| Suffolk City | 1 | Culiseta melanura | 9/11/01 |
| TOTAL: | 1 |
HORSES: West Nile Virus Positive in Virginia for 2001
| Location by County or City | Number of Positives | Onset date 1st Horse | Onset date most recent Horse |
| Chesapeake City | 2 | 9/5/01 | 10/29/01 |
| Madison Co. | 1 | 9/7/01 | |
| Rockingham Co. | 1 | 8/16/01 | |
| Southampton Co. | 1 | 11/04/01 | |
| Suffolk City | 1 | 10/06/01 | |
| TOTAL: | 6 | 8/16/01 | 11/4/01 |
BIRDS: West Nile Virus Positive in Virginia for 2002
| Location by County or City | Number of Positives | Kind of Bird | Date of 1st found | Most recent date found |
| Arlington Co. | 1 | Crow | 4/8/02 | |
| Fairfax Co. | 3 | Crow | 4/19/02 | 5/28/02 |
| Portsmouth City | 1 | Crow | 6/10/02 | |
| Prince William Co. | 1 | Crow | 6/11/02 | |
| TOTAL: | 6 | |||
WEST NILE VIRUS IDENTIFIED FROM 23 MOSQUITO SPECIES!
(Most of these species are found in Virginia)
Aedes albopictus Aedes vexans Aedes cinereus
Ochlerotatus atropalpus Ochlerotatus canadensis Ochlerotatus cantator
Ochlerotatus j. japonicus Ochlerotatus triseriatus Ochlerotatus trivittatus
Ochlerotatus sollicitans Ochlerotatus signifera Anopheles punctipennis
Anopheles quadrimaculatus Coquillettidia perturbans Culex pipiens
Culex restuans Culex salinarius Culex nigripalpus
Culex quinquefasciatus Culiseta melanura Psorophora ferox
Psorphora columbiae Uranotaenia sapphirina
Indiginous Malaria Surfaces In Virginia Westmoreland Woman is diagnosed (July 1998)
Monroe Hall - A Westmoreland County woman has been diagnosed with malaria, the first time in 50 years the often-fatal parasitic disease has been traced to a mosquito bite in Virginia. It is also the first time since 1996 the disease has been transmitted through a mosquito in the United States, according to the Centers for Disease Control in Atlanta.
"This is a rare situation," said Dr. Holly Williams, an 'epidemiologist with the Center's Division of Parasitic Diseases.
This malaria case was transmitted by a mosquito in Virginia, it was not an imported case.
Many thanks to Charles McCone for helping us with this article.
Feedback: You can make comments, suggestions or ask questions by email through vmca@mosquito-va.org