The Health District is informing the public about occurrences of insect bites from what appears to be Pyemotes herfsi itch mites. Bites appear to be consistent with those from microscopic mites, which are not known to transmit disease in humans.
The mites cannot live on humans, do not survive indoors and are not known to transmit disease. The bites are described as having tiny scabs in the center of a reddened area sometimes extending 3 – 4 centimeters. Multiple bites can appear as a red rash. The lesions usually disappear in 10 to 14 days. Symptoms are generally itching and redness at the bite location. The bites are typically located on the head, neck, arms and face and can grow in size and also become painful.
Individuals experiencing such insect bites are urged not to scratch, as breaks in the skin can cause an opportunity for bacterial infection. Check with your regular healthcare provider for advice on medication that can relieve the itching.
The wingless microscopic itch mites dwell in tree leaves and therefore easily fall from trees and blow with the wind. The following precautions can help prevent bites:
- The use of insect repellants with DEET may be useful in keeping mites away as well as wearing long sleeves and pants.
- Keep doors and windows closed to keep mites from blowing indoors. Microscopic mites can easily penetrate screens, so keeping windows and doors closed is also recommended.
- Avoid walking near heavy woods and vegetation in the evening when mite activity is heaviest and wash the skin once indoors.
- When working outdoors, especially while raking leaves:
1. Wear long sleeves, long pants and a hat
2. Use insect repellant containing DEET
3. Avoid direct handling of leaves and lawn clippings - Remove clothing items each day and launder them, since mites can remain in the fabric for several days. Take a warm soapy shower soon after coming indoors.