Clark County Health Department attempts to locate mosquito-borne
diseases within the county. Once we identify West Nile, St. Louis
encephalitis, or other mosquito-borne diseases, the Health Department
focuses efforts to eliminate mosquito breeding sites in those areas and educate residents
on how they can prevent mosquito infestations.
You Can Make A Difference
Residents can make an even larger impact than we can by
learning how to prevent mosquito populations in the first place.
There are many steps that everyone should
take to reduce mosquito populations around their home. While spraying
for mosquitoes is sometimes thought of as the first line of defense
against mosquitoes, personal protection and eliminating places where
mosquitoes breed are the most effective and healthiest ways of
preventing mosquito bites. The more people are involved, the greater the
amount of control.
protect yourself from bites by using insect repellant or protective
clothing. Some repellants may not be safe for children, so always
read instructions before using repellants. Protection also means
avoiding outdoor activity when mosquitoes are most prevalent—at dusk and
Second, eliminate mosquitoes at their source—stagnant
water. It takes three to seven days for thousands of
mosquitoes to develop in stagnant water. Below are
some helpful suggestions to reduce mosquito breeding sites
around your home, apartment or business:
Remove old tires, buckets or anything
that holds standing water, or empty them regularly.
Reduce runoff of water from sprinkler
systems and use additional landscaping to absorb standing water on
Keep your lawn mowed; mosquitoes
typically rest in high grass and weeds.
Repair leaky pipes and
Keep rain gutters free of
leaves and other debris that can trap water and allow for mosquitoes
Treat standing water that
can’t be drained with a larvicide containing Bti, available at home
and garden stores.
The picture below are mosquito larvae
from a woodland pool, if you see these "wigglers" on your property
these larvae will be biting mosquito adults within days!
To learn more about mosquito breeding sites from
Purdue's interactive map
If you operate or own a farm
click here for some specific guidance for ensuring the safety of
your livestock, family, and neighbors.