WAnaplasmosis
WBabesia
WBabesia canis
WBabesiosis
WBourbon virus
WBoutonneuse fever
WCrimean–Congo hemorrhagic fever
WHuman granulocytic anaplasmosis
WHuman monocytotropic ehrlichiosis
WLyme disease
WQ fever
WRocky Mountain spotted fever
WScrub typhus
WSouthern tick-associated rash illness
WSpotted fever rickettsiosis
WTick-borne encephalitis
WTularemia