Babesia vs Anaplasmosis: Key Differences, Symptoms, and Treatment
Babesia vs Anaplasmosis: these are two tick-borne infections that can occur together—but they affect the body differently and require different treatments.
The key difference between Babesia and Anaplasmosis is that Babesia infects red blood cells, while Anaplasmosis affects white blood cells.
Patients often search for “Babesia vs Anaplasma” when symptoms overlap but test results or treatment responses differ.
Coinfection is possible because the same tick can transmit multiple infections during a single bite.
Babesia vs Anaplasmosis: Key Differences
- Babesia: a parasite that infects red blood cells and may cause anemia, especially in more acute or severe cases
- Anaplasmosis: a bacterial infection that affects white blood cells and often causes low white blood cell and platelet counts
- Babesia symptoms: fatigue, sweats, shortness of breath, and sometimes anemia
- Anaplasmosis symptoms: fever, chills, low white blood cell count, low platelet count, and confusion
- Treatment: Babesia is commonly treated with atovaquone + azithromycin, while Anaplasmosis requires doxycycline
Can Babesia and Anaplasmosis cause confusion or brain fog? Yes. Some patients develop sudden confusion, memory problems, or difficulty thinking clearly when these infections occur together.
These symptoms may overlap with broader cognitive changes seen in tick-borne illness. Learn more about brain fog in Lyme disease and coinfections.
Babesia and Anaplasmosis coinfection can lead to serious illness, particularly in older adults.
The following case highlights how these differences matter clinically:
Paparone and colleagues described this case in the journal Nurse Practitioner. :contentReference[oaicite:0]{index=0}
Babesia and Anaplasmosis Coinfection Case
A 78-year-old woman was evaluated in the emergency room with fever, chills, lethargy, fatigue, and confusion. Her maximum temperature was 100.6°F.
Her blood tests revealed significant abnormalities:
- Anemia (hemoglobin dropped from 10.5 g/dL to 8 g/dL)
- Leukopenia (white blood cell count dropped from 5.0 × 10⁹/L to 2.6 × 10⁹/L)
- Thrombocytopenia (platelets fell to 39 × 10⁹/L)
Because of her fever and abnormal laboratory findings, doctors initially suspected sepsis.
The patient also reported multiple tick bites.
Diagnosing Babesia and Anaplasmosis Coinfection
The physicians identified Babesia parasites inside red blood cells using microscopy.
The doctors began treatment for Babesia with atovaquone and azithromycin.
However, the patient’s low white blood cell and platelet counts raised concern for Anaplasmosis.
Because standard Babesia treatment does not treat Anaplasmosis, doxycycline was added.
Laboratory testing confirmed a Babesia and Anaplasmosis coinfection.
The patient’s confusion improved dramatically after two weeks of treatment.
Why Babesia–Anaplasmosis Coinfection Can Be Dangerous
This case highlights several important lessons about tick-borne coinfections:
- Coinfections can cause confusion, especially in older adults
- Symptoms may resemble sepsis
- Babesia and Anaplasmosis require different treatments
- Treating only one infection may lead to worse outcomes
Babesia Symptoms in Elderly Patients
Babesia symptoms can vary widely and may be more severe in older adults. Common symptoms include fever, chills, fatigue, sweats, and sometimes anemia—particularly in more acute cases.
Babesia symptoms often overlap with other illnesses such as sepsis or other tick-borne diseases like Anaplasmosis.
Frequently Asked Questions
What is the difference between Babesia and Anaplasmosis?
Babesia is a parasite that infects red blood cells, while Anaplasmosis is a bacterial infection that affects white blood cells and platelets.
Can Babesia and Anaplasmosis occur together?
Yes. Both infections can be transmitted by the same tick and may occur at the same time.
How are Babesia and Anaplasmosis treated?
Babesia is treated with atovaquone and azithromycin, while Anaplasmosis requires doxycycline.
Can Babesia and Anaplasmosis cause confusion?
Yes. These infections can cause fever, fatigue, and confusion, particularly in older adults.
Related Articles
Babesia and Lyme: What Patients Need to Know
Geriatric Babesia: Why Older Patients Need Longer Treatment
Anaplasmosis in the brain
Severe anaplasmosis leads to multi-organ complications
Back to Coinfections Hub
References
- Paparone P, Paparone PW. Variable clinical presentations of babesiosis. Nurse Pract. 2018.
Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.
Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention
Thank you, Dr. Cameron, for your dedication and consistently excellent commentary! Because of your pioneering efforts with these horrific tick-borne diseases, the medical community is slowly becoming more intelligent about our country’s virtual plague of Lyme and its co-infections! Please keep on fighting the ignorance that is still much too prevalent! Thank you!
Thank you.
Very common scenario. If also bitten by dog Dermacentor ticks, the patients might have three (3) tick borne infections, adding Rickettsias to the cocktail. Rickettsioses might add transient, reversible strokes or head CVA’s in these young and old tick-infected people. Many great imitator diseases occur in tick-endemic areas beyond Lyme and the borrelioses. Thank you, Dr Cameron!!!
It’s been said the standard Rx used for Babesia is 2X750 mg atovaquone and 500 mg Azithromycin. Yet, some specialists with the disease insist this is simply too low and virtually no patient has been cured with this routine.Moreover, some are recommending Coartem as being more effective than the 2 drugs mentioned,considerably so.
I have not come to the same conclusion for many of my patients. I often find Malarone, a prescription that contains 250 twice a day of atovaquone. I have not advised Coartem. Not everyone agrees.