EN
In Europe, ticks are particularly important vectors of pathogens known as tick-borne pathogens (TBP).TBP can influence hosts, including domestic animals and humans as well as ticks. This review focuses on interactionsbetween hard ticks of the Ixodesgenera and medically and veterinary significant bacterial pathogens i.e.Borreliaburgdorferi s.l., Anaplasmaspp.,andRickettsiaspp. The interactions between ticks and bacteria include among othersthe impact on gene expression and tick behaviour. Infection with TBP may influence tick salivary proteins and midgutreceptors. Infection with B. burgdorferis.l. changes the bahaviour of the tick allowing them for longer questing andincreased mobility, while A. phagocytophilumincreases survival in low temperatures by upregulating the expression ofantifreeze glycoprotein (IAFGP) and effect on molting success. Whereas Rickettsiaspp. increases ticks’ attractiontowards the 900 MHz electromagnetic field.