Lyme Disease and Autism: Could Infections Worsen Neuropsychiatric Symptoms?
Can Lyme disease or Bartonella affect behavior?
Could infections worsen neuropsychiatric symptoms?
A case report raises important questions.
Lyme disease and autism is a sensitive topic. Lyme disease has not been proven to cause autism. However, infection, inflammation, and immune activation may worsen neuropsychiatric symptoms in some children.
This distinction—cause versus contribution—is critical when evaluating complex pediatric cases.
A case report by Offutt and Breitschwerdt describes a 14-year-old boy diagnosed with autism spectrum disorder, learning disabilities, PANS, and autoimmune encephalopathy who improved after treatment for polymicrobial vector-borne infections, including Lyme disease and Bartonella.
Can Lyme Disease Cause Autism?
There is not enough evidence to say that Lyme disease causes autism.
But this case report raises a different and clinically important question: Can Lyme disease, Bartonella, or other infections worsen behavioral, cognitive, or neuropsychiatric symptoms in vulnerable children?
That question deserves careful evaluation, especially when symptoms fluctuate, worsen suddenly, or appear alongside physical signs of illness.
Neuropsychiatric Symptoms in the Case Report
The child had years of complex symptoms, including:
- ADD/ADHD
- Tics
- Anxiety
- Depression and anger
- Oppositional behavior
- Dysgraphia
- Stammering
- Bed wetting
- Learning difficulties
He also received several diagnoses over time, including PANS, autism spectrum disorder, and autoimmune encephalopathy.
Bartonella, Lyme Disease, and Neuropsychiatric Symptoms
Testing later showed evidence of exposure to tick-borne infections, including Bartonella and Lyme disease.
The authors reported that treatment targeting these infections was associated with improvement in several cognitive and behavioral symptoms.
Reported improvements included reduced oppositional behavior, improved mood, fewer tics, better academic function, and improved social skills.
Start here: Pediatric Lyme disease
Why This Case Matters
This case does not prove that Lyme disease or Bartonella causes autism.
But it does suggest that some children with complex neuropsychiatric symptoms may benefit from a broader medical evaluation, especially when symptoms are severe, fluctuating, or resistant to standard care.
The authors concluded that infectious triggers may contribute to neuropsychiatric disorders in some children.
Clinical Takeaway
The relationship between Lyme disease and autism should be discussed carefully.
Lyme disease has not been proven to cause autism. But in some children, Lyme disease, Bartonella, immune activation, or inflammation may worsen neuropsychiatric symptoms.
When a child has sudden, severe, or fluctuating behavioral changes, it is reasonable to consider medical causes—not only psychiatric explanations.
Reference
Offutt, A., & Breitschwerdt, E. B. (2023). Substantial improvement of autism spectrum disorder in a child with learning disabilities in conjunction with treatment for polymicrobial vector-borne infections. Frontiers in Psychiatry, 14, 1205545. https://doi.org/10.3389/fpsyt.2023.1205545
Related Reading
- PANDAS and Lyme disease in a 7-year-old girl
- Lyme disease or dementia?
- Powassan virus in children: case reports
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
