There are over 800 species of ticks throughout the world, but only two families of ticks, Ixodidae (hard ticks) and Argasidae (soft ticks), are known to transmit diseases or illness to humans.

Learn where ticks live, how to prevent tick bites, and what to do after a tick bite. Homepage for CDC's website about ticks and tickborne diseases.

Jul 24, 2025 · Ticks can transmit diseases like Lyme disease, Rocky Mountain spotted fever, and Colorado tick fever, so prompt removal and medical attention are crucial. To remove a tick, use fine …

Nov 14, 2023 · As of 2019, Lyme disease is the most often diagnosed tick-borne illness. Here are images of unfed, human-biting ticks. The images also show where the ticks might be found in the …

Ticks are small bugs that can be hard to spot when they’re crawling on you. Tick bites can sometimes spread dangerous diseases, like Lyme disease and Rocky Mountain spotted fever.

Oct 13, 2024 · Ticks are parasites that feed on blood and can transmit serious diseases like Lyme disease and Rocky Mountain spotted fever, causing symptoms ranging from fever to severe illness.

Feb 6, 2026 · A tick is any of about 970 species of parasitic invertebrates in the order Ixodida. Ticks are important parasites of large wild and domestic animals and are also significant carriers of serious …

Jun 23, 2025 · Ticks can carry more than a dozen different disease-causing agents, including toxins, allergens, bacteria, parasites and viruses. There are early signs that it could be a bad year for tick...

May 23, 2025 · Tick bites are generally painless but may develop into a rash. If you suspect you’ve been bitten by a tick, here are signs to look for — with pictures.

Jun 24, 2024 · If you spend time outdoors or have pets that go outdoors, you need to beware of ticks. When they bite, certain types of ticks can pass on germs that cause different diseases.