Babesiosis is a tick-borne disease caused by the parasite Babesia microti. Many people infected with babesiosis do not have symptoms, but infection can sometimes be severe or fatal. It is transmitted through the bite of an infected blacklegged tick. Most cases of babesiosis occur in the warmer months when ticks are most active.
Babesiosis can also rarely be transmitted through a blood transfusion. In 2018, the FDA approved a test to screen the blood supply for Babesia microti.
Symptoms can include:
Health issues from the infection can include anemia and a low platelet count.
Severe infection is most common in people who:
To prevent babesiosis and other tick-borne diseases, be mindful of where ticks are present and take actions to prevent tick bites. Blacklegged ticks that carry the parasite have been found in Staten Island and parts of the northern Bronx. Ticks are also common in areas outside of NYC, including Long Island, upstate NY, New Jersey and other northeastern states.
Babesiosis is treated with a course of two medications. People with no signs or symptoms usually do not need to be treated. Speak to your healthcare provider for more information.
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