What is the Difference Between Babesiosis and Malaria?
At a Glance
Babesiosis and malaria are distinct parasitic infections that both attack red blood cells. Babesiosis is transmitted by ticks in specific US regions, while malaria is spread by mosquitoes in tropical areas. They require different treatments because malaria has a liver stage that babesiosis lacks.
In this answer
5 sections
Babesiosis is not the same thing as malaria, although the two diseases share many similarities. Both are caused by microscopic parasites that infect and destroy red blood cells [1][2]. Because of these similarities and the fact that both can cause severe disease, babesiosis is sometimes casually referred to as “American malaria.” However, they are distinct infections caused by different parasites, transmitted by different insects, found in different parts of the world, and require different medical treatments.
How You Get It (Transmission)
The most significant practical difference is how the infections are spread to humans.
- Babesiosis is a tick-borne illness. It is transmitted primarily through the bite of an infected Ixodes tick (commonly known as the black-legged or deer tick) [3][4]. Because this is the exact same tick that transmits Lyme disease, people can sometimes be infected with both at the same time. You can protect yourself by performing daily tick checks and using tick repellents.
- Malaria is a mosquito-borne illness, transmitted by the bite of infected Anopheles mosquitoes [5]. Protection focuses on mosquito nets and prophylactic antimalarial pills.
Where It Is Found (Geography)
The parasites that cause these diseases thrive in completely different environments.
- Babesiosis is highly concentrated in specific regions. In the United States, the most common species (Babesia microti) is endemic (naturally found) in the Northeast and Upper Midwest [6][7].
- Malaria is endemic to tropical and subtropical regions around the world, particularly in parts of Africa, Southeast Asia, and South America [8][9]. While extremely rare, locally acquired malaria can occasionally occur in the United States; however, the vast majority of US malaria cases are contracted during international travel [10].
Symptoms and High-Risk Groups
Both parasites cause illness by invading erythrocytes (red blood cells), multiplying inside them, and causing the cells to burst [11][12]. This destruction leads to hemolytic anemia (a condition where red blood cells are destroyed faster than your body can replace them) and causes symptoms like extreme fatigue, chills, and fever [11][1].
However, their symptoms can present differently. Malaria is famous for causing distinct, cyclical fever spikes that occur every 2 to 3 days. In contrast, fevers from babesiosis are typically irregular or sustained. While both diseases can be dangerous, babesiosis poses a particularly high risk of severe, life-threatening complications for individuals who have had their spleen removed, possess a weakened immune system, or are older adults [13][14].
Infection Cycle and the Liver Stage
Crucially, the life cycles of these parasites differ in a way that directly impacts your treatment. When the malaria parasite enters the body, it first travels to the liver and establishes a “dormant” stage (known as hypnozoites in some malaria species) before moving into the bloodstream.
In contrast, Babesia parasites enter the bloodstream directly from the tick bite and lack a liver stage [3][15].
Treatment Differences
Because Babesia does not have a dormant phase in the liver, its treatment differs from malaria. Treating certain types of malaria requires specific drugs (like primaquine or tafenoquine) designed to clear the dormant parasite from the liver to prevent future relapses [16].
For babesiosis, doctors do not need to target the liver. Instead, treatment focuses entirely on clearing the active parasite from the red blood cells. For mild to moderate cases, doctors typically use a combination of targeted antimicrobial and anti-parasitic drugs, such as atovaquone and azithromycin [17][18]. Severe cases may require different medications (like clindamycin and quinine) or specialized blood transfusions [13][19].
While a traditional blood smear examined under a microscope can identify both parasites, they can look remarkably similar, leading to potential misdiagnosis [20][21]. Today, doctors can use specialized DNA blood tests (like PCR) to provide highly accurate detection and easily distinguish between the two, which is especially important if a patient has traveled to areas where both diseases might be present [22].
Common questions in this guide
Is babesiosis the same thing as malaria?
Can you get babesiosis and Lyme disease at the same time?
Who is at high risk for severe babesiosis?
How do fevers from babesiosis and malaria differ?
Why is the treatment different for babesiosis and malaria?
Questions to Ask Your Doctor
Curated prompts to bring to your next appointment.
- 1.Are my current symptoms consistent with babesiosis, or is there any chance I could have been exposed to malaria during recent travel?
- 2.Because babesiosis is transmitted by the same tick as Lyme disease, should I also be tested for other tick-borne infections?
- 3.Based on my medical history (such as the health of my spleen and immune system), am I at a higher risk for severe complications from babesiosis?
- 4.What specific combination of anti-parasitic medications are you prescribing, and what side effects should I watch for?
- 5.Do I need another blood test after treatment to prove the parasite is gone?
Questions For You
Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.
Related questions
References
References (22)
- 1
Pathogenesis of Anemia in Canine Babesiosis: Possible Contribution of Pro-Inflammatory Cytokines and Chemokines-A Review.
Zygner W, Gójska-Zygner O, Norbury LJ
Pathogens (Basel, Switzerland) 2023; (12(2)) doi:10.3390/pathogens12020166.
PMID: 36839438 - 2
Case Report: Diagnosis of Hemolytic Anemia from Babesia and Secondary Multi-Pathogen Pneumonia Using a Metagenomic Next-Generation Sequencing Approach.
Lu Y, Zhang D, Han D, et al.
Infection and drug resistance 2024; (17()):3785-3791 doi:10.2147/IDR.S472861.
PMID: 39247756 - 3
Superior real-time polymerase chain reaction detection of Babesia microti parasites in whole blood utilizing high-copy BMN antigens as amplification targets.
Grabias B, Clement J, Krause PJ, et al.
Transfusion 2018; (58(8)):1924-1932 doi:10.1111/trf.14642.
PMID: 29664114 - 4
Splenic infarction in babesiosis: A rare presentation.
Gupta A, Patel P, Manvar K, et al.
Clinical case reports 2019; (7(8)):1591-1595 doi:10.1002/ccr3.2301.
PMID: 31428398 - 5
Serosurveillance for Plasmodium falciparum Malaria in Peruvian Army Peacekeeping Personnel, Central African Republic, 2021-2022.
Ventocilla JA, Valdivia HO, Ore M, et al.
Emerging infectious diseases 2024; (30(14)):80-85 doi:10.3201/eid3014.240295.
PMID: 39530875 - 6
Prevalence of Babesia in Canadian blood donors: June-October 2018.
Tonnetti L, O'Brien SF, Grégoire Y, et al.
Transfusion 2019; (59(10)):3171-3176 doi:10.1111/trf.15470.
PMID: 31385317 - 7
Transfusion-transmitted babesiosis: one state's experience.
Klevens RM, Cumming MA, Caten E, et al.
Transfusion 2018; (58(11)):2611-2616 doi:10.1111/trf.14943.
PMID: 30260481 - 8
Effect of seasonal variability on the increased malaria positivity rate in drought-prone malaria endemic areas of Ethiopia.
Tefera S, Bekele T, Ketema T
Journal of parasitic diseases : official organ of the Indian Society for Parasitology 2024; (48(4)):860-871 doi:10.1007/s12639-024-01720-z.
PMID: 39493473 - 9
Space-time clusters and co-occurrence of Plasmodium vivax and Plasmodium falciparum malaria in West Bengal, India.
Maiti M, Roy U
Malaria journal 2024; (23(1)):189 doi:10.1186/s12936-024-05015-9.
PMID: 38880891 - 10
Managing Acute Kidney Injury in Severe Falciparum Malaria: Insights from a Challenging Case.
Putra DE, Kasman I, Boro AMB, et al.
Iranian journal of parasitology 2025; (20(2)):316-321 doi:10.18502/ijpa.v20i2.19051.
PMID: 40747496 - 11
Risk Factors for Severe Infection, Hospitalization, and Prolonged Antimicrobial Therapy in Patients with Babesiosis.
Mareedu N, Schotthoefer AM, Tompkins J, et al.
The American journal of tropical medicine and hygiene 2017; (97(4)):1218-1225 doi:10.4269/ajtmh.17-0146.
PMID: 28722598 - 12
Transfusion-transmitted and community-acquired babesiosis in New York, 2004 to 2015.
Linden JV, Prusinski MA, Crowder LA, et al.
Transfusion 2018; (58(3)):660-668 doi:10.1111/trf.14476.
PMID: 29383735 - 13
Severe Babesiosis With Multifactorial Hemolysis and Pulmonary Complications in an Asplenic Patient at a Tertiary Cancer Center.
Ayana G, Carlson S, Keraga BK, et al.
Cureus 2025; (17(10)):e94343 doi:10.7759/cureus.94343.
PMID: 41220440 - 14
Autoimmune Hemolytic Anemia Associated With Human Babesiosis.
Rajapakse P, Bakirhan K
Journal of hematology 2021; (10(2)):41-45 doi:10.14740/jh820.
PMID: 34007364 - 15
Characteristics of transfusion-transmitted Babesia microti, American Red Cross 2010-2017.
Tonnetti L, Townsend RL, Dodd RY, Stramer SL
Transfusion 2019; (59(9)):2908-2912 doi:10.1111/trf.15425.
PMID: 31250463 - 16
Tafenoquine-Atovaquone Combination Achieves Radical Cure and Confers Sterile Immunity in Experimental Models of Human Babesiosis.
Vydyam P, Pal AC, Renard I, et al.
The Journal of infectious diseases 2024; (229(1)):161-172 doi:10.1093/infdis/jiad315.
PMID: 38169301 - 17
Broad Antimicrobial Resistance in a Case of Relapsing Babesiosis Successfully Treated With Tafenoquine.
Rogers R, Krause PJ, Norris AM, et al.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2023; (76(4)):741-744 doi:10.1093/cid/ciac473.
PMID: 35684960 - 18
Management strategies for human babesiosis.
Smith RP, Hunfeld KP, Krause PJ
Expert review of anti-infective therapy 2020; (18(7)):625-636 doi:10.1080/14787210.2020.1752193.
PMID: 32268823 - 19
Splenic infarction as a rare presentation of severe babesiosis.
Alvi A, Gupta S, Goyal P, et al.
IDCases 2019; (15()):e00491 doi:10.1016/j.idcr.2019.e00491.
PMID: 30740305 - 20
Some aspects on tick species in Mongolia and their potential role in the transmission of equine piroplasms, Anaplasma phagocytophilum and Borrelia burgdorferi L.
Narankhajid M, Yeruult C, Gurbadam A, et al.
Parasitology research 2018; (117(11)):3557-3566 doi:10.1007/s00436-018-6053-x.
PMID: 30178195 - 21
First documented case of imported human babesiosis in Honduras: Diagnostic challenges with malaria falciparum.
Chaver L, Flores H, Padilla W, et al.
IJID regions 2025; (17()):100794 doi:10.1016/j.ijregi.2025.100794.
PMID: 41321795 - 22
Validation of real-time PCR assays for detecting Plasmodium and Babesia DNA species in blood samples.
Patiño LH, Castañeda S, Camargo M, et al.
Acta tropica 2024; (258()):107350 doi:10.1016/j.actatropica.2024.107350.
PMID: 39134111
This page provides educational information on the differences between babesiosis and malaria. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a healthcare provider for your specific medical needs.
Get notified when new evidence is published on Babesiosis.
We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.