Tick-borne diseases

Ticks are abundant in woodlands all across Europe from early spring to late autumn. They live by sucking blood from animals and occasionally bite humans.

Ticks themselves do not cause disease but if a tick is infected with a virus or bacterium, then that pathogen can be transmitted through the tick’s bite and cause disease in humans.

Tick-borne encephalitis (TBE) is a common tick-borne disease in Europe (along with Lyme borreliosis).

Tick-borne diseases

Alkhurma haemorrhagic fever

Alkhurma haemorrhagic fever is a viral haemorrhagic disease reported mainly in Saudi Arabia. Transmission is through tick bites and contact with infected blood.


Information on basesiosis, a disease spread by ticks, with facts, prevention tips, infographics, and tick maps.

Borreliosis (Lyme disease)

Borreliosis, also known as Lyme disease, is transmitted by the bite of infected ticks. Most cases can be treated with antibiotics. No vaccine is available.

Human granulocytic anaplasmosis

Human granulocytic anaplasmosis (HGA) is a tick-borne infection caused by the bacterium Anaplasma phagocytophilum, a small bacterium infecting typically neutrophils transmitted by Ixodes ticks.


Rickettsiosis/rickettsioses are a group of diseases generally caused by species of Rickettsia. Most of the Rickettsioses are transmitted by ticks.

Tick-borne encephalitis

Tickborne encephalitis (TBE) is a viral infectious disease that attacks the central nervous system and can result in long-term neurological symptoms, and even death.

Tick-borne relapsing fever

Tick-borne relapsing fever is transmitted to humans through the bite of infected soft ticks. The disease is characterised by relapsing or recurring episodes of fever, often accompanied by headache, muscle and joint aches and nausea.