MedicalResearch.com Interview with:
Christina Nelson, MD, MPH, FAAP
Medical Epidemiologist
Centers for Disease Control and Prevention
Division of Vector-Borne Diseases | Bacterial Diseases Branch
Fort Collins, CO
Medical Research: What is the background for this study?
Dr. Nelson: Evidence-based guidelines for the diagnosis and treatment of Lyme disease have been provided by the Infectious Diseases Society of America for many years. These comprehensive guidelines have been vetted by external review panels as the best option for patient care. In endemic areas, patients with the typical rash (erythema migrans) can be diagnosed with Lyme disease clinically. Otherwise, the guidelines recommend that diagnosis be based on a history of possible exposure, compatible clinical features, and positive two-tier serologic testing.
Some patients who have been treated for Lyme disease may develop post-treatment Lyme disease syndrome (PTLDS) – fatigue, arthralgias, or other symptoms that persist after completing antibiotic treatment. Although the exact cause of post-treatment Lyme disease syndrome is unknown, it is thought to be due to an altered immune response or residual damage to tissues during the acute infection. A diagnosis of exclusion, PTLDS should only be diagnosed after the patient has been thoroughly evaluated and other potential causes of symptoms ruled out.
On the other hand, “chronic Lyme disease” is a loosely defined diagnosis that has been used to describe a variety of ailments. A small cadre of providers use unconventional methods to diagnose patients with chronic Lyme disease, and sometimes there is no objective evidence that the patient ever had Lyme disease. Multiple factors contribute to this phenomenon, including misconceptions about serologic testing, use of unvalidated diagnostic tests, and clinical diagnosis of Lyme disease based on nonspecific symptoms alone.
We know that patients have been – and continue to be – harmed by treatments for chronic Lyme disease. Patients have suffered from emboli, severe allergic reactions to antibiotics, neutropenia, and infections such as
Clostridium difficile. This is terrible and should never happen. However, there is another important danger related to these alternative practices. Some patients who have been diagnosed and treated for chronic Lyme disease later discover that another condition is the root of their physical problem. We wanted to highlight some of these cases in order to help educate providers and patients about this issue.
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