Vectors of Placer County

Mosquitoes
Mosquitoes of Placer County

Aedes species

Aedes mosquitoes are a concern in Placer County because a few species in this genus are very aggressive biters during specific peak periods in the year. Aedes sierrensis is a mosquito that can transmit the heartworm organism to dogs and cats.

    • Aedes bicristatus
    • Aedes cataphylla
    • Aedes clivis
    • Aedes fitchii
    • Aedes hemiteleus
    • Aedes hexodontus
    • Aedes increpitus
    • Aedes melanimon
    • Aedes nigromaculis
    • Aedes schizopinax
    • Aedes sierensis
    • Aedes tahoensis
    • Aedes ventrovittis
    • Aedes vexans
    • Aedes washinoi

Anopheles species

Anopheles mosquitoes are a concern in Placer County because a few species in this genus are very aggressive biters and are aggressive when seeking shelter during specific peak periods in the year. The bites from these mosquitoes can also cause significant discomfort and injury. Anopheles freeborni is a mosquito that can transmit the malaria organism from one human to another.

    • Anopheles franciscanus
    • Anopheles freeborni
    • Anopheles occidentalis
    • Anopheles punctipennis

Culex species

Culex mosquitoes are a concern in Placer County because a few species in this genus are the main vectors for West Nile virus, as well as other viruses that cause encephalitis.

    • Culex apicalis
    • Culex boharti
    • Culex erythrothorax
    • Culex pipiens
    • Culex stigmatosoma
    • Culex tarsalis
    • Culex territans
    • Culex thriambus

Culiseta species

Culiseta mosquitoes are not known to transmit diseases, but can be a significant pest problem.

    • Culiseta incidens
    • Culiseta inornata
    • Culiseta particeps

Ticks
Ticks of Placer County

  • Ixodes pacificus (Western Black-legged tick) – a vector for Lyme disease
  • Dermacentor occidentalis (Pacific Coast tick) – a vector of Rocky Mountain spotted fever
  • Dermacentor variabilis (American Dog tick) – a vector of Rocky Mountain spotted fever
  • Ornithodoros hermsi (a type of soft tick) – a vector of Tick-borne Relapsing Fever

See more information on our Ticks page.

Yellowjackets
Yellowjackets of Placer County

See more information on our Yellowjackets page.

Rodents
Rodents of Placer County

  • Rattus rattus (Roof rat)
  • Rattus norvegicus (Norway rat)
  • Mus musculus (House mouse)
  • Peromyscus maniculatus (Deer mouse) – a vector for Sin Nombre virus (Hanatvirus pulmonary syndrome)

See more information on our Rodents page.