Doctors say that they have seen an increase in a severe, sometimes fatal tick-borne disease on Long Island.

Babesiosis is a not-so-common tick-borne disease caused by parasites that infect red blood cells. Doctors say that it can be especially dangerous to seniors.

"It can really wreak havoc on their body," says Dr. Jarid Pachter, who practices in Cutchogue. "It can cause anemia. It can affect their kidneys, lungs, liver and it can have what we call multi-organ dysfunction - meaning it will affect every organ in your body."

Many people will not notice any symptoms even if they're infected. Others may develop flu-like symptoms.

Medical professionals say the best way to prevent Babesiosis is to take tick-prevention precautions.

For more on the disease, watch the clip to the left or click News 12 Extra on Optimum TV channel 612.