Mosquitoes and Diseases
Our mission at CCMCD is to efficiently manage the risks from vectors and vector-borne diseases to protect public health and quality of life in Clark County.
The locally established species of mosquitoes in Clark County are considered a nuisance, meaning that they bite humans and animals. Some of these species can vector diseases. Please note, there have been zero known positive cases of locally acquired mosquito-borne zoonotic disease transmission to humans in Clark County. Some mosquito species leave humans alone altogether, preferring to feed on birds, large mammals, snakes, or even frogs.
For more information on mosquito vector-borne diseases, please click the links below.
Vector Possibility in Clark County: Low
Britannica | Avian Malaria
USGS | Avian Malaria
VDCI | What is Heartworm Disease and How Does it Spread?
CDC | Dirofilariasis
VDCI | What is St. Louis Encephalitis and How Does it Spread?
CDC | St. Louis Encephalitis Virus
WA DOH | West Nile Virus
CDC | West Nile Virus
WA DOH | West Nile Virus Data
CCMCD | Clark County West Nile Virus Alert Levels
WA DOH | West Nile Virus Reporting Guidelines (WAC 246101)
USDA | Equine Encephalitis
MN DOH | Western Equine Encephalitis Fact Sheet
Vector Possibility in Clark County: Only Via Invasive Species
WHO | Chikungunya
CDC | Chikungunya Virus
WHO | Dengue
CDC | Dengue
WHO | Yellow Fever
CDC | Yellow Fever Virus
WA DOH | Zika Virus
CDC | Zika Virus
Vector Possibility in Clark County: None
WHO | COVID-19 Mythbusters
WA DOH | COVID-19
CDC | How COVID-19 Spreads
