EEE and WNV are arboviral illnesses spread by the bite of an infected mosquito. Mosquito, animal, and human specimens are tested for the presence of EEE and WNV infection at the New Hampshire Public Health Laboratories. Wild bird testing no longer provides useful data for disease surveillance and will not occur on a regular basis.
Positive test results are one of many factors that establish the risk level of mosquito-transmitted disease.
Additional information on arboviral testing results and historical data:
Historical Data
- 2012 Summary of Arbovirus Surveillance in New Hampshire

- 2012 Arboviral Risk Map

- 2012 Arboviral Test Results

- Public Health Threat Declaration Map, 08/24/2012

- 2011 Arboviral Risk Map

- 2011 Arboviral Test Results

- 2011 Summary of Arbovirus Surveillance in New Hampshire

- 2010 Arboviral Risk Map

- 2010 Arboviral Test Results

- 2010 Summary of Arbovirus Surveillance in New Hampshire

- 2009 EEE Risk Map

- 2009 Arboviral Test Results

- 2009 Summary of Arbovirus Surveillance in New Hampshire

- 2008 Arboviral Test Results

- 2008 Summary of Arbovirus Surveillance in New Hampshire

- 2008 Eastern Equine Encephalitis (EEE) Map

- 2008 West Nile Virus (WNV) Map

- 2007 Eastern Equine Encephalitis (EEE) Map

- 2007 West Nile Virus (WNV) Map

- 2006 Eastern Equine Encephalitis (EEE) Map

- 2006 West Nile Virus (WNV) Map

- 2003 to 2005 EEE & West Nile Virus Results Maps

Maps and test results are updated on Fridays as new positives are identified, so may not reflect the most recent results.
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