Introduction 

Lyme disease is an infection caused by the bacterium Borrelia burgdorferi, which is transmitted to humans via the bites of black-legged ticks carrying the bacteria. Although many patients recover with timely treatment, some continue to have symptoms for weeks, months, or even years following initial infection. Medically, these long-term symptoms are referred to as chronic Lyme disease.¹

Symptoms of Lyme disease

Lyme disease signs and symptoms can be categorized into early, later and late stages. 

1. Early symptoms (3-30 days post-bite)

• Erythema migrans (EM) rash: A red, circular rash - often with a bull's-eye appearance - is seen in about 70-80% of cases
• Flu-like symptoms: Pyrexia (fever) with chills, exhaustion, headache, muscle and joint aches, and swollen lymph nodes

2. Later symptoms (days to months post-bite)

• Joint pain: Serious joint pain and swelling, particularly in the knees
• Neurological issues: Facial paralysis, meningitis, nerve pain, or memory problems
• Heart problems: Irregular heartbeat (Lyme carditis)

3. Chronic symptoms (months to years post-bite)

• Arthritis: persistent inflammation in the joints
• Neurological symptoms: splitting headaches, neck stiffness, cognitive impairments, and peripheral neuropathy

Early detection, diagnosis, and treatment with antibiotics are crucial to prevent the progression of the disease.^2,3

Controversy around Lyme disease

Chronic Lyme disease has steadily moved from a fringe topic to a medical controversy, as there have been more and more reports of patients experiencing persistent symptoms - even after standard treatment. Lyme disease can dramatically affect a patient's quality of life. Whilst opinions vary as to whether it is an acute infection or not, many feel that it is, indeed, a chronic disease. However, others feel that persistent symptoms may point to other causes, such as autoimmune responses, or different diagnoses altogether.⁴

Lyme disease: awareness and controversies

Definition of chronic Lyme disease

Chronic Lyme disease is a term typically used to refer to cases where patients have completed conventional treatment, but they continue to experience symptoms months - or even years - later. This is a quite controversial term, and consequently its use is discouraged by health experts. Currently, experts believe that "post-treatment Lyme disease syndrome" (or PTLDS) is generally preferable, since the symptoms may come from an infection that is no longer present.⁵

Problems with diagnosis

Diagnostic tests

The most traditional tests used to detect Lyme disease are ELISA and Western blot, which detect Borrelia burgdorferi antibodies in a patient’s blood. Tests of this sort are not very reliable, especially in early stages of infection - meaning they often result in an unclear or inaccurate result. As the symptoms of Lyme disease overlap with and resemble those of several other conditions, these unreliable tests can make diagnosis challenging. 

There are no agreed diagnostic criteria for chronic Lyme disease. Some practitioners heavily weigh clinical judgment regarding patients' symptoms and medical history, whilst others insist on positive laboratory test results. This inconsistency is part of what leads to the variability in diagnosis and treatment.⁶

Overdiagnosis and misdiagnosis

Misdiagnosis of chronic Lyme disease may be due to its symptoms overlapping with other conditions, such as chronic fatigue syndrome or fibromyalgia. Misdiagnosis can lead to unnecessary and damaging treatments, which is a major concern shared by patients and healthcare providers.⁷

Treatment controversies

Standard treatment protocols

Early-stage Lyme disease usually responds well to a 3- to 4-week long course of antibiotics (usually doxycycline or amoxicillin). Most patients recover fully with this course of treatment, but some continue to experience symptoms even after the bacteria are (presumably) eliminated.

Chronic Lyme disease is still a controversial diagnosis, and the use of long-term antibiotics is problematic. Some clinical improvement has been reported by a few patients that had completed further courses of antibiotics. However, there is still not enough evidence demonstrating the benefit that can be delivered using this method. The long-term use of antibiotics carries several risks, including antibiotic resistance and adverse drug events.⁸

Controversial treatment options

Conventional treatments have left some patients unsatisfied, leading them to seek alternative therapies such as herbal products, dietary supplements, and hyperbaric oxygen therapy. However, there is insufficient evidence to support the therapeutic value of these alternative therapies, and many clinicians still question their use.

Impacts on patients and healthcare

Most patients who are diagnosed with PTLDS exhibit a myriad of symptoms, often described as disabling fatigue, pain, and losses in cognition. The unpredictable nature of these symptoms can cause frustration and anxiety, and make it hard for patients to live normal lives.^9,10

Lyme disease care exerts a significant burden on health care systems, and raises a series of challenges due to the fact that it is painful, expensive, tedious, and time-consuming to diagnose and treat. In addition, health care providers may disagree on the best method of diagnosis or treatment. Consequently, insurance companies are also often hesitant and reluctant to fund long-term treatments, putting an economic strain on patients.

Recent research and future directions

Development of diagnostic tools

Ongoing research is focused on the design of new, more precise, and reliable tests for the diagnosis of Lyme disease that could better detect active infection. This may reduce the rate of false-negative results and streamline diagnosis and treatment.

Currently, standard two-tier testing (STTT) is recommended for Lyme disease. This includes an enzyme immunoassay (EIA) as the first step, and western blotting (WB) as the second.¹¹

Therapeutic innovations 

New therapeutic strategies for Lyme disease include novel targeted antibiotics (such as hygromycin A) and immune-modulating drugs like FGFR (fibroblast growth factor receptor) inhibitors, which target immune dysregulation. These novel therapeutics are currently undergoing clinical testing, which hopefully yield the evidence needed to support their use for chronic Lyme disease.^12,13

Needs for consensus and collaboration

The medical field must reach a consensus regarding the diagnosis and treatment of post-treatment Lyme disease. This will likely require the collaboration of researchers, health workers, and patients. Whilst this will present challenges, it will hopefully also help improve patient outcomes in the long-term. 

FAQs

What is chronic Lyme disease?

This is a term given to the residual or remaining symptoms of Lyme disease that can persist for months to even years after completion of the standard planned antibiotic treatment. The term ”chronic Lyme disease” is very controversial and a topic of debate among professionals. Currently, the majority of health experts recommend using the term post-treatment Lyme disease syndrome (PTLDS) instead. 

How is Lyme disease diagnosed? 

Normally, doctors will diagnose Lyme disease by combining the patient’s clinical presentation (symptoms) with laboratory testing. 

What makes chronic Lyme disease controversial?

The controversy lies in the debate that remaining symptoms are due to persistent infection, an immune response, or something else. This leads to controversies in diagnosing the problem and how it needs to be addressed.

What is the usual treatment for Lyme disease?

The usual treatment for Lyme disease is antibiotic therapy, usually with doxycycline or amoxicillin. This treatment is very effective, as long as it is given early. 

Is long-term antibiotic treatment effective in the treatment of chronic Lyme disease?

Long-term antibiotic treatment is a controversial approach that is not clearly supported by scientific studies. Its benefits are not yet fully understood, but it is associated with risks such as antibiotic resistance.

What treatments exist for chronic Lyme disease?

Alternative therapies include herbal medications, dietary supplements, and hyperbaric oxygen therapy. The efficacy of these alternative therapies is unproven, so patients should be cautious.

Is Lyme disease commonly misdiagnosed?

Yes. Lyme disease can often be misdiagnosed since its symptoms are quite similar to conditions like chronic fatigue or fibromyalgia. Misdiagnosis can result in inappropriate treatment.

What are the issues regarding the treatment of late chronic Lyme disease?

Patients experience a wide array of disabling symptoms, the challenge of receiving a positive diagnosis, and also challenges in providing the patient with the right treatment for their condition—all possible areas that contribute to the economic and human cost associated with the disease.

Can Lyme disease be prevented?

Tick bites can be prevented by wearing insect repellents, proper clothing, and checking the body for any accessible tick bites after exposure to wood or grassy areas. Even if you are bitten, you can reduce your risk of infection by removing the tick as quickly as possible. 

Summary

Lyme disease and post-treatment Lyme disease are complex and controversial conditions. The challenges in the management of this condition call for better diagnostic tools and improved therapies.

Approaches to dealing with chronic Lyme disease need ongoing research through open communication and a patient-centred view. Through ideal collaboration and understanding, we will reach solutions that better serve this condition and its victims.

While controversies around chronic Lyme disease are not going to be resolved overnight, understanding and approaching this disease remain imperative. By simply listening and staying open to new ideas, we make great strides in improving the care and quality of life for individuals living with chronic Lyme disease.