“It was confirmed by DNA and morphological characteristics that they are ticks not previously found in Rhode Island,” the agency said.
The ticks were discovered by Danielle M. Tufts, a former associate research scientist at Columbia University.
Tufts identified the tick species Haemaphysalis longicornis, also known as the Asian longhorn tick, and Haemaphysalis punctata when studying ticks on Block Island this summer.
The ticks were originally thought to be native, but on further examination were found to be exotic species.
The Asian longhorn tick was first detected in the U.S. in 2017 in New Jersey, but archived samples later determined these ticks may have been in the country since at least 2010.
“The Asian longhorned tick is considered a serious threat to livestock in Australia and New Zealand, where it is invasive,” the agency said Monday. “It poses a risk to New England livestock because it can attach itself to various warm-blooded animals to feed. If too many ticks attach to one animal, the loss of blood can kill the animal.”
In 2018, a study warned the tick could spread to much of the eastern U.S. and parts of the Midwest, as well as a small section of the Pacific Northwest.
The H. punctata, known as the “red sheep tick,” is native to the southern half of Europe, as well as England and parts of the North African coast.
“The finding on Block Island is notable because this tick is not known to exist outside of its home range,” state officials said.
Both types of ticks can transmit a “variety of diseases” to humans and animals, however, only one disease has been found in these ticks in the U.S.
Officials recommend the following guidelines to prevent ticks:
- Apply tick repellents to exposed skin and clothing.
- Spray permethrin-containing products on outer clothing, including shoes. Permethrin should not be used directly on skin.
- Check clothing and exposed skin prior to moving from one area to another.
- Wear light colored long-sleeved shirts and long pants.
- Conduct body checks immediately after returning from outdoor activities in tick-infested areas.
“If ticks are found, remove them by using fine-tipped tweezers, wash the affected area with soap and water, and disinfect the bite site,”…