Health Department Services

Environmental Health Services



Arboviral Diseases


Arboviral (short for arthropod-borne) diseases are caused by arboviruses that are spread to people by a bite of an infected arthropod, including mosquitoes and ticks. These infections generally occur during the warm-weather months when mosquitoes and ticks are active. Symptoms of illness are usually mild and nonspecific, and can include headache, fever, fatigue, muscle aches, and swollen lymph nodes. Some people may experience severe neuroinvasive illness, including flaccid paralysis, encephalitis (swelling of the brain) and meningitis




  • Use effective mosquito repellant and apply according to the label instructions.
  • Wear long-sleeved shirts, long pants, socks, and shoes.
  • Mosquitoes may bite through thin clothing, so spraying clothes with a repellent containing permethrin or DEET will give extra protection. These repellants are the most effective and most studied.
  • Avoid being outside during times of high mosquito activity, specifically around dawn and dusk.
  • Keep window screens repaired so that mosquitoes cannot  enter your home.
  • Dispose of discarded tires, cans, or plastic containers left outside that may contain standing water.
  • Drain standing water from pool or hot tub covers.
  • Turn over plastic wading pools and wheel barrows when not in use.
  • Change the water in bird baths, pet dishes and wading pools every 3-4 days.
  • Keep drains, ditches and culverts clean of trash and weeds so water will drain properly.
  • Clean gutters to ensure they drain properly.

 Mosquito transmitted diseases


California Serogroup Viruses 

California encephalitis (CA) 
Jamestown Canyon (JC) 
La Crosse encephalitis (LAC)

Eastern and Western Equine Encephalitis 

Eastern equine encephalitis (EEE)
Western equine encephalitis (WEE)  


St. Louis encephalitis (SLE)
West Nile virus (WNV)


Tick transmitted disease

Powassan infection (POW)


Travel related diseases 

Chikungunya fever (CHIK) 
Dengue fever (DEN) 
Japanese encephalitis (JE)  
Yellow fever (YF)
Zika virus

 For more information go to:

Greendale Residents_ Pick up your FREE Tick Removal Kit at the Greendale Health Department


 2019 Bird Surveillance for West Nile Virus


Corvid Surveillance (crows, blue jays, and ravens): 

Wisconsin Department of Public Health is requesting the report of all sick and dead corvids for WNV testing from May 1 to October 31, 2019. You are encouraged to report any sick or dead bird, but corvids (crows, ravens, and blue jays) are of particular interest for West Nile virus, because they are known to get sick and die from a West Nile virus infection. 

The USDA Wildlife Services office will continue to manage the Wisconsin Dead Bird Reporting Hotline. 

Please contact the Dead Bird Reporting Hotline at 1-800-433-1610 to report all sick and dead corvids, to request shipping kits prior to shipment, to notify them when you are ready to ship a dead bird for testing, and to request new 2019 UPS shipping labels.


 For more information go to:

Radon kits are available for Greendale residents for a $10 cash deposit.  The deposit is refunded when you return your results to the Health Department.  For additional information, contact the Greendale Health Department at 414-423-2110.