Lyme Disease Challenges the “One Microbe, One Disease” Model
Lyme disease often involves multiple microbes—not just a single infection.
The traditional “one microbe, one disease” model does not fully explain the complexity of tick-borne illnesses.
With the recognition of tick-borne co-infections, Lyme disease is increasingly understood as a polymicrobial condition.
Evidence for Multiple Infections
Co-infections such as Lyme disease and Babesia have been associated with more severe and prolonged illness.
In one study, concurrent infection led to increased symptom severity and longer disease duration.
For more, see Lyme disease and Babesia co-infection.
Study: Immune Responses to Multiple Microbes
Researchers in Finland evaluated immune responses to 20 different microbes in patients with tick-borne disease.
The study included acute Lyme cases, late Lyme cases, post-treatment Lyme patients, immunocompromised individuals, and controls.
Key finding: 65% of patients showed immune responses to multiple organisms.
This included responses to bacteria, viruses, and parasites commonly associated with tick-borne diseases.
Rethinking the Germ Theory Model
The authors concluded that tick-borne diseases do not conform to the traditional “one microbe, one disease” framework.
Instead, many patients appear to have overlapping infections or immune responses to multiple pathogens.
This raises important questions about diagnosis, testing, and treatment strategies.
Clinical Implications
Recognizing polymicrobial involvement may help explain why some patients experience more severe or persistent symptoms.
It also supports a broader diagnostic approach when evaluating patients with suspected tick-borne illness.
Explore more on multiple infections from a single tick bite.
Clinical Takeaway
Lyme disease often involves multiple microbes, challenging the traditional single-pathogen model of infection.
Related Articles:
References:
- Krause PJ et al. Concurrent Lyme disease and babesiosis. JAMA. 1996.
- Garg K et al. Evaluating polymicrobial immune responses in tick-borne diseases. Sci Rep. 2018.
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
This actually makes the most sense in that we now know how many various diseases are transmitted by one tick. But, how do you decide which one to treat first if you have 6 different infections? Where do you start and what order?
I was recently diagnosed with EBV, I had mono at age 16, I also have been bitten 5-6 times by Lyme ticks and never treated, I am weak, drastically fatigued, short of breath, chest wall aches, have episodes of vertigo, no one had been able to diagnose me with ANYTHING until 6 weeks ago, rest and drink fluids is all I was told, I’m growing weak and very depressed, I think I have Lyme and probably for at lest a few years, the tests here in Maine say negative so the doctors do not take extra precautions, my family thinks I have Lyme, I’m not better, I’m still lame, tired, he aches, poor appetite, headaches frequently if I have EBV how long does this ladt and why do I still feel sick ?
The best treatment would be to choose the treatment protocol that kills most of them regardless of their class or name.
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June 9 1992, I found live tick on me, 3 days, post military camp at Fort Leonardwood MO. Blood test June 11. A comparison blood drawn July 10.Phone call Received July 17. 1992. Confirmation of present Borrelia burgdorferi. I Was not tolerant of prescribed treatment, oral azithromycin started on July 17. Symptoms worsened: severe fatigue, major shooting skeletal pain, heart affected and temporary intermittent paralysis. Infectious disease Dr examined me, drew blood for numerous tests. All negative. Due to my deteriorating physical condition at 22 yrs old, knowing I had been bitten by a tick, he prescribed 14 days same time daily, IV antibiotics cephalexin, starting on Aug 18, 92. He said I was cured. Symptoms reoccure in Oct. I was told I was cured. Symptoms reoccurring saw neurological specialist June 93. Test was normal..Diagnosed with Fibromyalgia. Symptoms have been and are always present. I have been diagnosed with PTSD from the experience at 22 yrs old. Within the last 4 years my short term memory has worsened. I can’t find words or peoples names who I’ve known for years. Is there anything out there? Is there research i could benefit from? Pharmaceutical remedies have been a bandage. Cannabis oil eases the sparatic intermittent pains temporarily. Looking for help.
You are not alone. A diagnosis of “PTLDS” is considered a syndrome after Lyme disease. I have opposed the term as it implies we have a test to rule out a persistent infection. You are only 22. You should keep working on finding an answer.
Noel, Please do some research on chronic Lyme, and find a Lyme literate doctor. Ask for referral at Lymedisease.org or Lymenet.org. 2 weeks of antibiotics does not cure Lyme. I’m sorry.