california, Diseases/Conditions, Environment

San Joaquin County Reports First Detection Of West Nile Virus Infection

STOCKTON, CA (July 20, 2012) — San Joaquin County Health Officer, Dr. Karen Furst, confirmed that a 48-year old male living in Stockton is the first human with West Nile Virus (WNV) infection in San Joaquin County this year.

The man reported having no symptoms, but tested positive for the virus when donating blood. For reporting purposes this does not meet the case definition for the California Department of Public Health to count as a case, but it does indicate that there is currently active transmission of WNV to people in San Joaquin County.

West Nile Virus is most commonly transmitted to humans and animals through the bite of a mosquito infected with the virus. Hot weather, abandoned swimming pools and standing water create ideal conditions for the development of mosquitoes and the subsequent spread of the virus. “It is very important that people take precautions to protect themselves and their families from mosquito bites,” advises Dr. Furst.

Most individuals who are infected with WNV will not experience any illness. About one in five people infected with WNV will develop West Nile Fever with symptoms of headache, fever and fatigue. However, some individuals — less than 1 percent — will develop serious neurologic illness such as encephalitis or meningitis.

Individuals 50 years of age and older have a higher chance of getting sick and are more likely to develop serious symptoms when infected with WNV. Recent data also indicate that those with diabetes and/or hypertension are at greatest risk for serious illness.

Dr. Furst recommends that individuals prevent exposure to mosquito bites and West Nile Virus.



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