Babesia: What You Need to Know

Ticks can spread the blood parasite known as Babesia

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Are there parasites in your blood?

Babesiosis, caused by babesia, is one diagnosis that could make anyone cringe! A condition caused by a parasite that infiltrates your red blood cells and wreaks havoc on your body? Hard pass! Unfortunately, every year, a few thousand people in the U.S. will contract babesiosis and suffer the consequences.


Babesia, or babesiae in its plural form, is a protozoan parasite that infects red blood cells. As they multiply, more and more healthy red blood cells are infiltrated, hijacked, and destroyed. This can lead to sometimes fatal health conditions— especially in the elderly, immuno-compromised, or those living without a spleen.


In humans, the transmission of babesiae usually happens in one of three ways. They can be spread by deer ticks, through blood transfusions, or during pregnancy from mother to baby. The most common method of transport happens via deer tick bite. Now, most of us probably think of Lyme disease as being associated with ticks, not babesiosis. However, babesiosis can sometimes manifest as a coinfection with Lyme disease.

How It Affects the Body

Relatively healthy individuals may not experience any obvious symptoms and the presence of babesiae may go completely unnoticed. Others may experience severe symptoms. Symptoms of babesiosis can first appear anywhere from 1-9 weeks after exposure. The condition may present flu-like symptoms such as fever, headaches, fatigue, chills, and body aches. Additional symptoms may include shortness of breath, hemolytic anemia, and heart or renal failure.

Babesia Screening

Babesiae tend to be endemic to certain areas, particularly the northeastern coast of the U.S. as well as the states of Wisconsin and Minnesota. We first became aware of the possibility of transmission through blood infusions back in 1979. However, it wasn’t until 2011 that the CDC opened a case surveillance system for states to report known cases. Blood banks ask screening questions to eliminate donations from those who have had a confirmed case of babesiosis. However, since many healthy individuals never experience symptoms or receive a diagnosis, some blood donors with babesiae may unknowingly slip through. The FDA has made recommendations for certain high-risk states to perform blood testing in hopes of weeding out most of these cases. Until all blood banks can implement effective screening and testing measures, we will continue to see babesiosis cases resulting from transfusions.

Tick Bites: Tips to Avoid Them

While the thought of getting infected with a babesia from a blood transfusion is disturbing, you are much more likely to acquire it through a tick bite. Luckily, there are a few measures that you can take to help protect yourself from being bitten by a babesiae-carrying tick. Take a look at the following precautionary list:

  • Wear long sleeves, pants, and boots if you are entering into wooded or bushy areas.
  • Apply repellants to your skin and clothing.
  • Wear light-colored clothing to help you see if a tick is catching a ride on your garments.
  • Tuck your pants into your socks to help protect your ankles from exposure.
  • Shower and inspect your skin thoroughly after spending time outdoors. Younger deer ticks can be as small as a poppyseed, so you’ll want to be very thorough about this.
  • If you do spot a tick, remove it promptly and clean the affected area. The longer the tick stays on the higher the chance that it will transmit disease.

Take precautions when you can. If you think you may have been bitten by a tick, make sure to report it to your doctor.

Life Insurance Questions?

We hope that this information on babesia is useful to you.

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About Cali Naughton

Cali Naughton graduated from the University of Texas at Arlington. She joined the marketing team at Empower Brokerage in the spring of 2021 as a marketing specialist and the department photographer.

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