Borrelia miyamotoi Symptoms: Mild in Some, Severe in Others
Symptoms may range from mild flu-like illness to neurologic disease
Immunocompromised individuals may face more severe complications
Diagnosis and treatment remain challenging in some cases
Borrelia miyamotoi symptoms can vary widely. Some individuals develop a mild flu-like illness while others experience neurologic complications requiring hospitalization. Because symptoms overlap with other tick-borne illnesses, diagnosis may be delayed, particularly when symptoms resemble other causes of delayed Lyme disease diagnosis.
What symptoms does Borrelia miyamotoi cause?
The authors explain, “Immunocompetent, and otherwise healthy, patients present with milder, flu-like symptoms: fever, fatigue, sleepiness, chills, muscle and joint stiffness, aches and pains, and nausea.” They also note that relapsing episodes of fever can occur.
In fact, symptoms may be mild enough that some individuals with Borrelia miyamotoi disease never seek medical attention.
However, more severe illness can occur. Cleveland and colleagues reported that immunocompromised individuals may experience reduced cognition, disturbed gait, memory deficits, confusion, and neurologic complications related to meningoencephalitis. These findings overlap with symptoms commonly seen in neurologic Lyme disease.
Additional symptoms that have been reported include hearing loss, weight loss, uveitis, iritis, neck stiffness, and photophobia. Severe illness may require hospitalization.
Can Borrelia miyamotoi cause long-term effects?
There is limited research on Borrelia miyamotoi long term effects. Persistent neurologic symptoms, fatigue, cognitive difficulties, and prolonged recovery have been described in some patients, particularly those with delayed diagnosis or severe disease. More research is needed to determine how often symptoms persist after treatment.
Does Borrelia miyamotoi cause a rash?
Unlike Lyme disease, a classic expanding bull’s-eye rash is not commonly associated with Borrelia miyamotoi infection. The absence of a rash may delay recognition because patients and clinicians may not suspect a tick-borne illness.
Who is considered immunocompromised?
Although the designation of immunocompromised is broad, Cleveland and colleagues point out that severe disease is more commonly reported in patients prescribed B-cell depletion therapies such as rituximab, cancer immunotherapies, and immunosuppressive medications used for rheumatologic disease.
What treatments are used for Borrelia miyamotoi disease?
Several treatment approaches have been proposed for BMD. Doxycycline and ceftriaxone have been used because of their role in treating relapsing fever infections.
“Ampicillin, azithromycin, and vancomycin, or a combination thereof, have also been used to treat BMD,” wrote Cleveland and colleagues.
Research has confirmed in vitro susceptibility to doxycycline, ceftriaxone, and azithromycin, while amoxicillin resistance has been reported in laboratory studies. Clinical treatment decisions may depend on symptom severity, neurologic involvement, and patient-specific factors.
Can treatment trigger a Herxheimer reaction?
Jarisch-Herxheimer reactions appear uncommon but have been reported following treatment. Patients with severe symptoms or neurologic disease may benefit from close monitoring during early therapy.
Frequently Asked Questions
Can Borrelia miyamotoi symptoms relapse?
Yes. Recurrent fever episodes have been described, which differs from many other tick-borne illnesses.
Is Borrelia miyamotoi the same as Lyme disease?
No. Both are tick-borne infections, but Borrelia miyamotoi belongs to the relapsing fever group and may present differently.
Can healthy people develop severe disease?
Most severe cases are described in immunocompromised patients, though illness severity varies.
Can Borrelia miyamotoi affect the nervous system?
Yes. Neurologic complications including confusion, gait problems, cognitive changes, and meningoencephalitis have been reported, particularly in higher-risk patients. These symptoms may overlap with manifestations discussed in neurologic Lyme disease.
Does Borrelia miyamotoi occur with other tick-borne infections?
Yes. Ticks can carry multiple pathogens simultaneously, raising concern for overlapping symptoms and coinfections. Clinicians may consider evaluating for tick-borne coinfections when symptoms are atypical or severe.
Clinical Takeaway
Borrelia miyamotoi symptoms range from mild flu-like illness to severe neurologic disease. The absence of a classic rash, overlap with Lyme disease symptoms, and uncertainty regarding long-term outcomes can complicate diagnosis and treatment decisions.
Clinicians should consider Borrelia miyamotoi infection in patients with compatible symptoms and tick exposure, especially when testing for Lyme disease alone does not explain the clinical picture.
Related Articles
Patients with Borrelia miyamotoi infection may also benefit from learning about related neurologic symptoms, diagnostic challenges, and overlapping tick-borne infections.
What is Borrelia miyamotoi?
Doctors face challenges in diagnosing Borrelia miyamotoi
Tick-borne coinfections
Testing limitations in tick-borne disease
Delayed Lyme disease diagnosis
References
- Cleveland DW, Anderson CC, Brissette CA. Borrelia miyamotoi: A Comprehensive Review. Pathogens. 2023;12(2):267.
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
