Babesia Mayo Clinic: What 38 Cases Revealed About Treatment
Babesia Mayo Clinic case series findings provide valuable insights into how this tick-borne infection presents in real-world clinical settings. In their review of 38 Babesia cases, Fida and colleagues found that nearly 50% of patients did not recall a tick bite and experienced delays in diagnosis due to the broad range of symptoms.
The average age was 63, and none of the patients died.
Babesia Mayo Clinic Findings: Symptoms
Malaise was the most common symptom (84%), followed by fever (71%), chills (52%), and joint pain (32%).
These symptoms overlap with Lyme disease symptoms, which may contribute to delays in diagnosis. Classic Babesia symptoms such as night sweats and air hunger were not specifically reported in this series.
Hospitalization and ICU Rates
Sixty-eight percent of patients required hospitalization, with 21% of those admitted to the intensive care unit.
Indications for ICU admission included:
- Hemolytic anemia
- Shock requiring vasopressor support
- Acute respiratory distress syndrome
Importantly, 2 out of 3 hospitalized patients were not immunocompromised. This challenges the assumption that only high-risk individuals develop severe Babesia.
Babesia Mayo Clinic Data on Co-infections
Overall, 24% of patients were co-infected with Lyme disease, 5% with Anaplasma, and 8% with both Lyme disease and Anaplasma.
“Co-infection with Borrelia spp. or Anaplasma spp. resulted in increased severity of symptoms and a higher chance of hospitalization,” writes Fida.
This underscores the importance of evaluating for co-infections in patients with tick-borne illness. Patients with both Babesia and Anaplasmosis may present with more complex symptoms.
Babesia Mayo Clinic Treatment Approaches
What were the most common treatment approaches?
- 68% of patients were initially treated with azithromycin and atovaquone (Mepron)
- 32% received clindamycin and quinine or quinidine; most switched due to side effects
- 3 severely ill patients required an exchange transfusion
The treatment duration depended on clinical response but was at least 7 to 10 days.
One patient required 6 months of treatment due to persistently positive blood smears. This patient was co-infected with Lyme disease and had a prior splenectomy.
Asymptomatic Babesia Infections
The authors estimate that 40% of children and 20% of adults may experience asymptomatic infection.
This raises concerns about the blood supply, as asymptomatic carriers may unknowingly donate infected blood. It also suggests that some patients with Lyme disease relapse may have unrecognized Babesia.
Editor’s Note
This study included Babesia patients identified through the Mayo Clinic database. In my practice in New York, most Babesia cases were not hospitalized, suggesting this series may reflect more severe presentations.
Additional studies are needed to determine optimal treatment strategies when multiple tick-borne infections are present.
The finding that 2 out of 3 hospitalized patients were not immunocompromised is particularly important. Babesia should be considered in any patient with compatible symptoms in endemic areas, regardless of immune status.
Frequently Asked Questions
What did the Mayo Clinic study find about Babesia symptoms?
Malaise was most common (84%), followed by fever (71%), chills (52%), and joint pain (32%). Nearly 50% did not recall a tick bite.
How many Babesia patients need hospitalization?
In this series, 68% required hospitalization and 21% of those were admitted to ICU.
What is the best treatment for Babesia?
Most patients were treated with azithromycin and atovaquone. Quinine-based regimens had more side effects.
How common are Lyme and Babesia co-infections?
24% had Lyme disease, 5% had Anaplasma, and 8% had both. Co-infection increased severity.
Can healthy people get severe Babesia?
Yes. Two out of three hospitalized patients were not immunocompromised.
References
- Fida M, Challener D, Hamdi A, O’Horo J, Abu Saleh O. Babesiosis: A Retrospective Review of 38 Cases in the Upper Midwest. Open Forum Infect Dis. 2019;6(7).
Related Reading
- Babesia and Lyme: What Patients Need to Know
- Babesia Treatment Protocol: What Works When Standard Therapy Fails
- Chronic Babesia: Why Some Infections Won’t Clear
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
