Some ticks can be vectors for more than one kind of pathogen.
Not all ticks are infected, so a tick bite does not necessarily mean you will get a disease. In addition, even if a tick is infected, it must be attached to your skin for at least several hours before it can successfully transmit the pathogens to you. Therefore, the sooner you remove attached ticks, the safer you will be. There are additional tick species that bite humans in limited areas of the United States. Although larval ticks will bite man, they rarely transmit pathogens, but both nymphs and adults may do so.