Lyme disease cases in Pennsylvania and the six New England states - Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont -made up over 60 percent of all positive tests in the U.S.in 2017, Quest Diagnostics reported.
According to state Health Commissioner Dr Mark Levine, Lyme is increasingly common in Vermont - in fact, 95 percent of all reported cases come from the northeastern US.
It comes after a study released last week revealed that every USA state has residents who tested positive for Lyme disease.
A Vermont resident has died from a rare complication of Lyme disease, according to health officials.
Lyme carditis is a rare condition that occurs when the bacteria that cause Lyme disease enter the tissues of the heart.
Lyme disease is spread by bites from infected blacklegged ticks and deer ticks. When left untreated, Lyme disease can cause complications in the joints and nervous system.
A new report has found that the tick-borne illness Lyme disease has been detected in all 50 states, and cases continue to rise. Once in the tissue, the bacteria can interfere with the normal movement of electrical signals between the heart's chambers, resulting in heart block.
The health department issued an advisory Monday to Vermont's health care providers asking them to talk to patients who may have Lyme disease about their cardiac symptoms and to also remember the potential role of Lyme carditis in sudden cardiac events, the release said.
The department released no details about the fatality, saying only that the victim was a Franklin County resident. California had 483 people with positive test results - a 194.5 percent increase from 2015. The CDC reports that in the last 30 years there have only been nine cases of fatal Lyme carditis in the United States.
Lyme disease is still most prevalent in the Northeast, with seven states - Connecticut, Maine, Massachusetts, New Hampshire, Pennsylvania, Rhode Island and Vermont - accounting for 60 percent of all cases previous year.
According to CNBC, Valneva, a French company, is working on a vaccine for Lyme disease that was recently approved for fast-track by the FDA.