Tickborne Disease Facts

  • Cow TickAt least 49 species of ticks are found in the state of California.
  • Exotic ticks potentially carrying diseases such as: Babesiosis, Heartwater, and Colorado Tick Fever Virus have been introduced into California repeatedly.
  • Ticks carrying deadly pathogens such as the Tick-borne encephalitis virus and Heartwater disease can be carried long distances by migrating birds.
  • California’s cattle producers lose an estimated 5 percent to 10 percent of the beef calf crop (45,000 to 90,000 calves) annually to a single tickborne disease – Epizootic Bovine Abortion (EBA)
  • Tick control measures and vaccination against diseases such as bovine anaplasmosis incur additional costs to cattle producers yearly.
  • Cattle and deer often support ticks species that carry diseases transmissible to humans such as Lyme disease and Human Granulocytic Anaplasmosis.
  • Most tickborne diseases affecting cattle in California lack vaccines against them or require long term antibiotic therapy to treat them.