Deer Tick

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Babesiosis is a tick-borne disease caused by malaria-like parasites of the genus Babesia. These single-celled organisms invade red blood cells and may cause fatigue, aches, fever, chills, sweating, dark urine, enlarged spleen, or anemia. Infections can range from no serious symptoms to fatal disease. Tracking Babesia infections is difficult due to the number of asymptomatic infections. Babesiosis was first reported as "Texas cattle fever" around the turn of the century.


Deer Tick (Ixodes scapularis)
Blacklegged Tick (other Ixodes ticks)

Causative Agent:

Babesia equi
Babesia microti
Babesia, Babesiosis microti, Babesiosis equi

Endemic Area:

Coastal areas of the northeast and West coast. Other areas of Northeast including Dutchess County, NY

Incubation Period:

1-52 weeks

Classic Symptoms:

Fever, hemolytic anemia, constitutional symptions,
possible death

Lab Test(s):

Thick & thin blood smears, serologic test(s)


Anti-malarial drugs, Quinine, Antibiotics (Clindamycin)

Frequently Asked Questions 




Search the Center for Disease Control, The National Institute of Health or PubMed for more information on Babesiosis.

Source: Dutchess County DOH, National Institute of Health








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