Long-Term Antibiotic Use

• As a result, antibiotic resistance may develop, enabling bacteria to evolve and withstand future treatments.

• While probiotics have recognized benefits for gut and immune health, research highlights the need to evaluate potential risks. A study on the Escherichia coli Nissle 1917 strain suggests that certain probiotic strains may carry genotoxic risks, emphasizing the complexity of restoring gut health after long-term antibiotic use (Benefits and concerns of probiotics: an overview of the potential genotoxicity of the colibactin-producing Escherichia coli Nissle 1917 strain)

• Probiotics, although helpful, cannot replace a diverse, healthy microbiome.

• An increased risk of infections exists even with the assistance of probiotics.

For instance, opportunistic pathogens may continue to thrive, leading to infections with Clostridium difficile (C. difficile) and Candida.

• The gut microbiome plays a crucial role in immune function.

• Increased gut permeability (leaky gut) and malabsorption

Consequences of Misdiagnosis and Unnecessary Treatment

• In many cases, antibiotic treatment lasts for months or even years.

• However, the treatment often fails to address the actual cause of symptoms.

Impact on Quality of Life

Notably, gut and immune system issues are not the only factors affecting quality of life. Additionally, long-term antibiotic therapy may cause side effects such as fatigue, dizziness, allergic reactions, and neurological issues.

• Importance of Informed Consent

Given these risks, it is crucial to approach chronic Lyme disease treatment with caution. Therefore, healthcare providers should encourage fully informed consent.

• Moreover, financial concerns play a role. Patients may invest in costly, long-term treatments with little evidence of effectiveness. As a result, the risk of overdiagnosis and unnecessary treatment increases.

Chronic Lyme Disease as a “Catch-All” Diagnosis

Chronic Lyme disease sometimes serves as a ‘catch-all’ diagnosis for patients whose conditions do not fit established medical categories. Because Lyme disease symptoms vary and are nonspecific, misdiagnosed patients may receive unnecessary treatments that fail to address the root cause of their symptoms.

Use of “Lyme-Like” Labels

Some refer to symptoms commonly associated with Lyme disease as ‘Lyme-like illness’ or ‘chronic Lyme syndrome,’ even without a confirmed diagnosis. This can lead to confusion and over-diagnosis.

Factors Contributing to Misdiagnosis of Chronic Lyme Disease

Lack of Reliable Testing

Inappropriate test usage or misinterpretation can play a role.

Standard Lyme disease testing approach follows a two-tier system:

• ELISA screening test (initial screening)
• Western blot (confirmatory test for positive ELISA results)
This method aims to reduce false positives and improve diagnostic accuracy.

• Challenges with Western Blot Testing

Variable Accuracy and Interpretation Difficulties:

• Western blot detects IgM and IgG antibodies against Borrelia burgdorferi antigens, relying on specific antibody bands for interpretation. Cross-reactivity with other infections may lead to false positives. (Misdiagnosis of Lyme Disease With Unnecessary Antimicrobial Treatment ).

• Using the Western blot alone can lead to misdiagnosis.

Any positive result from a test that relies solely on Western blotting is most likely a false positive (Lyme Disease: How Reliable Are Serologic Results?).

Diagnoses that prioritize self-reported symptoms over objective testing are more prone to misdiagnosis.

Misdiagnosis and Unnecessary Treatment

A study reviewing 1,261 patients referred for Lyme disease evaluation found:

• Only 26.5% received an accurate diagnosis.
• Many misdiagnosed patients were female.
• Co-infections were wrongly diagnosed, increasing the risk of unnecessary antimicrobial treatment. (Misdiagnosis of Lyme Disease With Unnecessary Antimicrobial Treatment).

There are other conditions with similar symptoms as chronic Lyme disease that need to be excluded. This is to avoid misdiagnoses:

Thyroid disorders (hypothyroidism or hyperthyroidism)

Multiple sclerosis (MS)

Chronic infections like Epstein-Barr virus, herpes simplex virus, and cytomegalovirus

Neurodegenerative and autoimmune conditions

Serious Conditions Missed

A study published in JAMA Internal Medicine illustrates how neoplasms were misdiagnosed as “Chronic Lyme Disease” This resulted in delayed treatments for the patients.

Such delays underscore the critical need for accurate diagnosis (Mistaken Identity: Many Diagnoses are Frequently Misattributed to Lyme Disease).

Tests that assist with the correct diagnosis of disseminated manifestations of Lyme disease include cerebrospinal fluid tests, brain imaging, EMG/nerve conduction studies, skin biopsy, and neuropsychological testing (Columbia Lyme and Tick-Borne Diseases Research Center).

Impact of Unconventional Treatments

Some treatments lack scientific backing and may carry health risks.

A multidisciplinary approach—drawing from neurology, immunology, and rheumatology—helps ensure accurate diagnosis and effective care.

Scientific accuracy should accompany raising awareness about the condition. Less risky treatment solutions should be encouraged.

An evidence-based approach remains essential for proper diagnosis and treatment.

Medical Disclaimer

The information provided in this article is for informational purposes only and is not intended as medical advice. It should not be used as a substitute for professional medical guidance, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider regarding any medical concerns. Please always seek medical advice timeously.

Related: Bacterial Antibiotic Resistance Bacterial Antibiotic Resistance – EMFSA

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Abstract

Day and night cycles are the most important cue for the central clock of human beings, and they are also important for the gut clock. The aim of the study is to determine the differences in the gut microbiota of rotational shift workers when working the day versus night shift. Fecal samples and other data were collected from 10 volunteer male security officers after 4 weeks of day shift work (07:00-15:00 h) and also after 2 weeks of night shift work (23:00-07:00 h). In total, 20 stool samples were collected for analysis of gut microbiota (10 subjects x 2 work shifts) and stored at -80°C until analysis by 16 S rRNA sequencing. The relative abundances of Bacteroidetes were reduced and those of Actinobacteria and Firmicutes increased when working the night compared to day shift. Faecalibacterium abundance was found to be a biomarker of the day shift work. Dorea longicatena and Dorea formicigenerans were significantly more abundant in individuals when working the night shift. Rotational day and night shift work causes circadian rhythm disturbance with an associated alteration in the abundances of gut microbiota, leading to the concern that such induced alteration of gut microbiota may at least partially contribute to an increased risk of future metabolic syndrome and gastrointestinal pathology.

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Excerpts:

The sun can indeed shine out of your backside, suggests research. Not because you’re self-absorbed, but because you’ve absorbed gut-altering UV radiation.

This is the first study to show that skin exposure to UVB light alters the gut microbiome in humans. Published in Frontiers in Microbiology, the analysis suggests that vitamin D mediates the change—which could help explain the protective effect of UVB light in inflammatory diseases like MS and IBD.

Exposure to UVB in sunlight is well-known to drive vitamin D production in the skin, and recent studies suggest that vitamin D alters the human gut microbiome. However, that UVB therefore causes gut microbiome changes, via vitamin D production, has so far been shown only in rodents.

In a new clinical pilot study, researchers tested the effect of skin UVB exposure on the human gut microbiome.

Healthy female volunteers (n=21) were given three one-minute sessions of full-body UVB exposure in a single week. Before and after treatment, stool samples were taken for analysis of gut bacteria—as well blood samples for vitamin D levels.

Skin UVB exposure significantly increased gut microbial diversity, but only in subjects who were not taking vitamin D supplements during the (winter) study (n=12).

“Prior to UVB exposure, these women had a less diverse and balanced gut microbiome than those taking regular vitamin D supplements,” reports Prof. Bruce Vallance, who led the University of British Columbia study. “UVB exposure boosted the richness and evenness of their microbiome to levels indistinguishable from the supplemented group, whose microbiome was not significantly changed.”

The results also showed some agreement with mouse studies using UVB, such as an increase in Firmicutes and decrease in Bacteroidetes in the gut following exposure.

Prof. Bruce Vallance: “The results of this study have implications for people who are undergoing UVB phototherapy, and identifies a novel skin-gut axis that may contribute to the protective role of UVB light exposure in inflammatory diseases like MS and IBD.”

https://m.medicalxpress.com/news/2019-10-sun-doesnt-skin-uv-exposure.html?fbclid=IwAR29Sk681AauWIeZW_O7EifmFxBA8_KVwoaKBkD6GANRZ64_5cUEltsBJXg

More information: Frontiers in Microbiology, DOI: 10.3389/fmicb.2019.02410 , https://www.frontiersin.org/articles/10.3389/fmicb.2019.02410/full

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The post Ultraviolet Irradiation of Skin Alters the Faecal Microbiome Independently of Vitamin D in Mice. appeared first on EMFSA.