Tick-Borne Diseases
Ticks are found throughout the United States and can carry a range of pathogens that affect people, pets, and wildlife. More than 90 tick species exist in the U.S., but only a handful are known to transmit disease. Ticks require a blood meal to survive and often feed on small mammals, deer, birds, and pets. Some species readily attach to dogs, which is why checking pets after outdoor activity is so important.
Ticks are not insects; they are arachnids, closely related to spiders and mites. Unlike mosquitoes, which bite and leave, ticks attach firmly to their host and remain there for an extended period if not found and removed. This is why regular tick checks, especially after spending time in wooded or brushy areas, are an important preventive step.
Keeping your yard maintained, reducing shaded moisture pockets, and using a natural tick control service can help lower tick activity in outdoor areas.
Common Types of Tick-Borne Diseases in the U.S.
Tick-borne diseases occur in different regions of the country and are transmitted by different species of ticks. Below is a general overview of the major tick-borne diseases recognized in the United States. For symptoms, treatment, or medical guidance, always refer to the Centers for Disease Control and Prevention (CDC) or a licensed healthcare provider.
Lyme Disease
The most commonly reported tick-borne disease in the U.S. It is associated primarily with the blacklegged tick and is found most often in the Northeast, Mid-Atlantic, and Upper Midwest. Lyme disease is a significant public health focus, and the CDC provides extensive information on prevention and awareness.
Rocky Mountain Spotted Fever (RMSF)
RMSF is associated with the American dog tick, brown dog tick, and Rocky Mountain wood tick, depending on region. It is reported most frequently in parts of the Southeast, Midwest, and Southwestern U.S. The CDC offers detailed educational resources about its transmission and regional distribution.
Ehrlichiosis
Spread primarily by the lone star tick, ehrlichiosis is most common in the Southcentral and Eastern United States. Public health agencies track cases and provide information for residents in higher-risk regions.
Babesiosis
Babesiosis occurs mainly in the Northeast and Upper Midwest and is transmitted by the blacklegged tick. Public health organizations monitor regional cases and give guidance on prevention.
Colorado Tick Fever
This rare tick-borne virus is associated with the Rocky Mountain wood tick and is found mostly in higher-elevation regions of the Western United States. Educational information is available through CDC and state health departments.
Tick Management Tips
Ticks aren’t evenly spread across a property. Research on residential yards consistently finds the large majority of them in shade and along the woodland edge, with very few in open mowed lawn. That means tick pressure is a border problem, and it’s why treatment order matters more than treatment volume.
Highest pressure: the woodland edge, unmaintained brush, and stone walls or woodpiles that hold both moisture and rodents.
Moderate pressure: ornamental plantings, groundcover, and mulch beds along the foundation, especially on the shaded side of the house.
Lowest pressure: open, sunny, regularly mowed lawn. Ticks dry out fast in direct sun.
- Tick pressure concentrates along borders, not open lawn
- Stone walls and woodpiles hold moisture and host rodents
- Shaded foundation plantings are the second priority zone
- Relocating play areas and seating away from edges reduces contact
Tick Behavior 101
A tick isn’t an insect. It’s an arachnid, closer to a spider, and it moves through four life stages: egg, larva, nymph, and adult. Each stage after hatching needs one blood meal before it can move to the next, which is why a single blacklegged tick can take two years to finish its life cycle.
Size is the part most people get wrong. A nymph is roughly the size of a poppy seed and an adult is closer to a sesame seed. Nymphs are the stage most often found on people, largely because they’re small enough to go unnoticed for days.
Ticks find a host by questing. They climb to the tip of a grass blade or leaf, hold their front legs out, and wait for something to brush past. Once attached, a tick can stay in place for several days if nobody finds it.
- Ticks are arachnids, not insects
- Four life stages, one blood meal required at each
- Nymphs are poppy seed sized and easy to miss
- They quest rather than jump, fly, or drop from trees
- An attached tick can feed for several days