Babesia Canada: First Case Signals Expanding Tick-Borne Threat
Babesia Canada is now a reality. The first documented case of Babesia microti in Manitoba confirms that this tick-borne parasite has crossed the border—and raises concern about increasing co-infections with Lyme disease. :contentReference[oaicite:0]{index=0}
Researchers from the University of Manitoba reported a case involving a 7-year-old boy with asplenia who developed Babesiosis without traveling outside the province.
The child was successfully treated with a six-week course of atovaquone and azithromycin.
Evidence That Babesia Has Arrived in Canada
Multiple findings suggest that Babesia is already established in parts of Canada:
- 88 cases reported in neighboring U.S. states (Minnesota, Wisconsin, North Dakota)
- Blacklegged ticks infected with Babesia microti identified in Manitoba as early as 2010
- Tick infection rates ranging from 1.8% to 10%
- Babesia detected in rodent reservoirs at multiple sites
- Infected ticks transported by migratory birds into Ontario
These findings indicate that Babesia transmission is not isolated—and may already be spreading.
Why Lyme Disease Matters
Babesia does not spread in isolation. Research from the Yale School of Public Health shows that co-infection with Lyme disease may enhance its geographic expansion.
“B. burgdorferi and B. microti co-occur in ticks more frequently than expected, increasing human exposure.”
This helps explain why Babesia often emerges in areas where Lyme disease is already established.
Babesia Requires Different Treatment
Babesia is not treated the same way as Lyme disease.
Standard Lyme antibiotics—such as doxycycline, amoxicillin, and cefuroxime—are not effective against Babesia.
Typical treatment includes:
- Atovaquone plus azithromycin
- Clindamycin plus quinine (less well tolerated)
Missing a Babesia co-infection can lead to persistent or worsening symptoms despite Lyme treatment.
Symptoms and Diagnosis
Babesiosis can range from mild to life-threatening, particularly in immunocompromised patients.
Common symptoms include:
- Fever and chills
- Night sweats
- Fatigue
- Headaches
- Muscle aches
The infection can also cause hemolytic anemia, as parasites invade and destroy red blood cells.
Diagnosis may involve:
- Blood smear (early infection)
- PCR testing
- Antibody testing
However, standard testing may miss cases, making clinical suspicion critical.
Blood Transfusion Risk
Unlike Lyme disease, Babesia can be transmitted through blood transfusions.
Cases of transfusion-transmitted babesiosis are increasingly recognized, and screening of blood donors remains limited.
This adds another layer of concern for public health.
Why This Matters
Babesia is an emerging infection that is expanding geographically alongside Lyme disease.
As tick-borne diseases spread, co-infections are becoming more common—and more difficult to diagnose.
Failure to recognize Babesia may lead to incomplete treatment and prolonged illness.
Clinical Perspective
Clinicians should consider Babesia in patients with Lyme disease who have persistent symptoms, particularly fever, sweats, or anemia.
Recognizing co-infections is essential to effective treatment and improved patient outcomes.
Related Reading
- Babesia and Lyme: What Patients Need to Know
- Babesia Hudson Valley: Cases Explode
- Lyme Disease Co-Infections
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
Given the complete lack of Lyme/Babesia specialists in Canada, how could anyone say that this illness is “new” or “emerging”?
This narrative is nothing more than a shallow attempt of the medical community to cover their behind after decades of extreme neglect. There are over thirty know species of Babesia; only a handful of those bacteria have any identifiable lab tests. The tests that do exist are in no way reliable.
You sir are spreading misinformation in order to cover the tracks of gross medical mismanagement. You should be ashamed of yourself.
I’m from Toronto Canada. I’m positive on a Babesia Fish test. I can’t afford to go to Europe. Why is this not on the Toronto public health. Mepron is 770$ a month way overpriced!!
Doctors in the U.S. are increasingly recognizing Babesia following a tick bite. B. microti, the causative agent of Babesia, is the second most common infection in the tick in the NorthEastern United States. It follows a tick bite. Other modes of transmission have not been studied. It is important for a doctor to make sure the the clinical picture fits in case the Babesia test is a false positive. It is a shame that the cost has not dropped for Mepron even with the introduction of a generic product.
Ok. So where in B.C. can a test be performed for Babesia? Anyone?
We have a mother and her three children here in Alberta. Mother has Lyme disease. Three children tested positive for babesia, oldest daughter is quite ill now. They need treatment, can you recommend someone. They live here in Alberta, Canada.
Sorry to hear you are finding it difficult to find a doctor. I am not familiar with the doctors in your area.
Join Canadian Lyme groups and they will point in right direction
Check out Dr Taylor in Calgary. She’s an ILADS trained naturopath, who can prescribe. She treats Lyme patients from all over Canada. She’s amazing!
https://www.drtaylornd.com/
I live in Kentucky, USA. I presented with flu-like symptoms, 102+ fever…I continue to have a low-grade fever, extreme fatigue, aches…received a positive blood test for babesia. My dr. Sent me to an infectious disease dr who then ran a PCR, which came back negative. I continue to have episodes of flu-like symptoms with 102 fever…but neg. On flu. Are there any conditions that can mimic and give a false positive?
There are several Babesia tests
1. parasites in the red blood cells if caught early
2. PCR
3. antibodies.
Some patients never have a positive test. I used clinical judgment after ruling out other causes.