Avian

The Maryland Department of Health and Mental Hygiene (DHMH) discontinued pickup and testing of dead birds in 2003 once the virus became established throughout the State.

At present, the U.S. Department of Defense and the Maryland Department of Natural Resources are continuing to monitor arboviral activity in both live and dead birds in Maryland. The map below depicts results of those surveillance efforts for 2003.

Map of West Nile Positive Results in Birds- 2003

Equine:

Two-hundred and thirty-four (234) Maryland horses were reported with West Nile Virus (WNV) infection in 20 jurisdictions in 2003.

Seventy-five (75) of the 234 horse cases were fatal.

Map of West Nile Positive Results in Horses- 2003

Mosquitoes:

Over 200,000 mosquitoes were tested in Maryland between June 1 and October 31, 2003. A total of 115 mosquito pools in 15 jurisdictions tested positive for West Nile Virus during that time. This total includes 62 positive pools reported by Maryland DHMH and 53 positive pools reported by the Department of Defense.

Pool=group of mosquitoes

View Results by Jurisdiction

Map of West Nile Positive Results in Mosquitoes- 2003

Humans:

Seventy-three (73) human WNV cases (66 confirmed, 7 probable) were reported in 2003 from the following 13 jurisdictions:

Eight (8) WN-related fatalities were reported in Maryland in 2003.

Please see press releases and maps below for additional information.

Map of West Nile Positive Results in Humans- 2003

West Nile Virus is Diagnosis in Frederick County Woman

West Nile Virus is Diagnosed in Harford County Man

Maryland's Arbovirus Surveillance Testing Results 2002

Surveillance Summaries and Final Reports

2001 Maryland Arbovirus Surveillance Final Report

2000 Maryland Arbovirus Surveillance Final Report

2001 WNV Surveillance Summary

2000 WNV Surveillance Summary

Mosquito-Borne Encephalitis || West Nile Virus