A Tick-Borne Disease With No Warning Rash Is Spreading Across the U.S.
Summary
A type of disease spread by ticks is becoming more common in the U.S., including some that do not show the usual warning signs like a rash. Scientists have discovered that certain tick-borne viruses can hide from the immune system, making them harder to detect and fight. Experts are watching these changes closely to better understand the risks.Key Facts
- Tick-borne diseases in the U.S. are increasing, partly due to climate change and expanding tick habitats.
- Anaplasmosis is one such disease; it causes fever and aches but usually does not cause a rash, so it can be missed.
- Orthornairoviruses are a family of viruses carried by ticks that can cause severe illness, including hemorrhagic fever.
- These viruses use proteins called OTUs to remove immune system signals, helping them avoid detection.
- A virus called PCTNV, found in Pacific Coast ticks, has a strong ability to evade the immune system in lab tests.
- The Pacific Coast tick already bites humans and spreads other diseases, raising concerns about possible PCTNV infection.
- More research is needed to confirm if people are being infected by this new virus.
- Experts stress the importance of awareness about different types of ticks and the diseases they might carry.
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