Archive for the ‘Ticks’ Category

Understanding Mycoplasma: Symptoms, Testing, & Treatment

https://rawlsmd.com/health-articles/mycoplasma-the-most-common-lyme-coinfection

Understanding Mycoplasma: Symptoms, Testing, and Treatment | RawlsMD

Mycoplasma: The #1 Lyme Coinfection + How to Outsmart It

by Dr. Bill Rawls
Updated 12/9/20

Mycoplasma is the stealthiest of all stealth microbes. It may be a major player in many chronic diseases associated with aging, but remarkably, most people — including most doctors — have limited awareness of it.

If you have Lyme disease, fibromyalgia, chronic fatigue syndrome, autoimmune disease, or possibly any other chronic illness, however, mycoplasma is a microbe you should know about.

Mycoplasma: The Master Manipulator

Mycoplasma is a parasite, meaning it can’t live without a host. And it’s the smallest of all bacteria: 4,000 of them can fit inside a single red blood cell in your body. By comparison, only 10-15 average-sized bacteria would fit in the same cell.

Unlike other bacteria, mycoplasmas don’t have a protective cell wall, creating an interesting survival strategy: They can shape-shift and fit into areas where other bacteria can’t go. For example, it also allows them to slip inside cells of the host. The lack of a cell wall makes mycoplasma resistant to some commonly prescribed classes of antibiotics like penicillins, which normally work by interrupting a bacteria’s cell wall so that when the bacteria divides, it falls apart.

More than 200 known types of mycoplasma (and probably many yet to be discovered) can infect animals and plants. There are at least 23 different varieties of mycoplasma that can infect humans. A few of them are considered harmless normal flora, but most have the potential to cause disease.

image split in three: tick, flea, and mosquito

Mycoplasma is spread by biting insects (ticks, mosquitoes, fleas, biting flies), sexual contact, contaminated food, and airborne droplets. Most everyone has been exposed to some form of mycoplasma. Several mycoplasma species have been closely associated with many chronic degenerative diseases like multiple sclerosis and Alzheimer’s disease, according to publications like the International Reviews of Immunology and the British Journal of Medical Practitioners, respectively.

Even beyond its tiny size, shape-shifting qualities, and proliferous nature, mycoplasma is a master at manipulating and outmaneuvering the host’s immune system. Half of its genetic makeup is devoted to that exclusive purpose.

While it has little ability to cause direct harm, it can use the host’s immune function to its advantage: Mycoplasma generates chronic low-grade inflammation and steals vital nutrients from the body.

In fact, everything that this stealthy microbe needs for survival — vitamins, minerals, fats, carbohydrates, and amino acids — must be scavenged from the host; it makes nothing itself. Mitochondria, which are the energy powerhouses of cells, are prime targets to sustain the microorganism, which helps explain why fatigue is always a factor in mycoplasma infections.

Mycoplasma favors infecting the cells of tissues that line different areas of the body. Common sites of infection include:

  • Nasal passages
  • Sinuses
  • Lungs
  • Lining of the intestinal tract
  • Genital tract
  • Vesicles inside the brain
  • Synovial lining of joints

They also commonly infect white blood cells, red blood cells, and brain tissue. Different mycoplasma has a preference for certain tissues, but all mycoplasma species possess the ability to infect any type of tissue and all organ systems.

The most common mycoplasma, Mycoplasma pneumoniae, has a preference for lung tissue. Initial infection with M. pneumoniae typically causes pharyngitis (sore throat), cough, fever, headache, malaise, runny nose — all the common symptoms of a basic upper respiratory infection.

man wrapped in blanket, coughing

If the person’s immune system is not full strength, the infection can progress to bronchitis and even pneumonia (about 20% of pneumonias). The type of pneumonia caused by mycoplasma, often called “walking pneumonia,” is rarely severe enough to result in hospitalization, though it can drag on for weeks or even months.

But even when those respiratory symptoms are cleared, it may not be the end of the story. That’s because after mycoplasma enters the body, it also infects white blood cells. And once inside a white blood cell, it can be carried to all parts of the body, infecting tissues and organs.

The potential for widespread infection is very much influenced by the status of the host’s immune function. If immune function is optimal, the microbe is contained after the initial infection, and no long-term harm occurs. Approximately 30-70% of people carry at least one species of mycoplasma without having symptoms. It essentially becomes like normal flora of the microbiome, which are the non-threatening microbes found on the skin, in the gut, and body cavities.

But most mycoplasma species aren’t normal flora, and they are just waiting for an opportunity to gain a foothold. If immune function slips for whatever reason, chronic, systemic infection becomes possible. Mycoplasma begins stealing vital nutrients and causing a wide range of symptoms that are unrelated to the initial infection. The general breakdown of tissues by stealth microbes like mycoplasma accelerates the aging process and is likely a primary factor in many, if not most, chronic degenerative diseases.

Stealth Characteristics of Mycoplasma

Stealth microbes are a stronger force together than when alone. In other words, mycoplasma may not be a problem unless another stealth microbe (or microbes) is present. Lyme disease may be a good example of this phenomenon.

image split in half: borrelia and mycoplasma

Mycoplasma is a common Lyme coinfection: It’s present in 75% or more of Lyme disease cases. Mycoplasma is known to be carried and spread by ticks, but it is also possible that mycoplasma is already present in the body when a bite from a tickcarrying borrelia — the primary bacteria associated with Lyme — occurs.

Immune dysfunction caused by the new tick-borne infection or possible other coinfection allows mycoplasma to proliferate and cause multi-systemic symptoms throughout the body. Many symptoms that occur in Lyme disease can be caused by mycoplasma, too.

Body Systems Affected by Chronic Mycoplasma

woman in bed, face in hand, tired

Mycoplasma infection may be localized to certain areas of the body (such as the lungs), or it can be more widespread and systemic. Parts of the body where symptoms can manifest include:

  • Joints: Mycoplasma commonly infects the synovial lining of joints, the lining protecting the joints. Ninety percent of people with rheumatoid arthritis test positive for mycoplasma in the synovial fluid.
  • Muscles: Muscle pain from breakdown of muscle fibers is common with systemic mycoplasma infection.
  • Heart: Mycoplasma can lead to inflammation of the heart, such as endocarditis, myocarditis, pericarditis.
  • Nerves: Mycoplasma scavenges fats from the myelin sheath covering nerve tissue. Not surprisingly, mycoplasma (and other microbes, including chlamydiaand borrelia) has been linked to multiple sclerosis and other neurodegenerative diseases, including ALS (Mycoplasma fermentans is most common) and Parkinson’s disease.

    Nerve involvement can be associated with neuropathic pain like burning and tingling in the hands and feet. Brain inflammation, contributing to insomnia, brain fog, depression, and anxiety, is common with systemic mycoplasma infection.

  • Immune system: Mycoplasma is a top candidate for explaining autoimmunity; it stimulates host self-damage, and it can live inside cells while simultaneously turning off the ability of the immune system to recognize the cell as abnormal.
  • Lungs: Mycoplasma in the lungs contributes to respiratory symptoms like sore throat, cough, fever, headache, malaise, runny nose, bronchitis, and pneumonia.
  • Digestive tract: Intestinal mycoplasma infection destroys villi — fingerlike projections in the small intestine that aid food absorption — and compromises the intestinal barrier. This allows accelerated damage by lectins in grains (especially wheat), beans, soy, nightshade vegetables, and dairy.

    Mycoplasma may contribute to leaky gut, or increased intestinal permeability. Severe mycoplasma intestinal infection can lead to nutritional deficiencies and weight loss. Infection of the gastric mucosa (stomach lining) can cause chronic gastritis with nausea and stomach discomfort.

  • Ears: Mycoplasma infection has been associated with hearing loss and ringing in the ears.
  • Eyes: The eyes may be impacted by mycoplasma with such issues as conjunctivitis, eye swelling, and vision loss.
  • Reproductive system: Research suggests mycoplasma has been found in ovarian cancer tissue. It may also contribute to interstitial cystitis, a bladder condition marked by severe pain and urinary frequency.
  • Blood: Mycoplasma has been found in the bone marrow of children with leukemia.

Diagnosing Mycoplasma and the Limitations of Testing

When it comes to testing, PCR (polymerase chain reaction) is the most accurate method for testing mycoplasma. It’s cost-effective and evaluates for the presence of mycoplasma’s genetic material, a test that’s easy, sensitive, and quick test to obtain at most laboratories.

However, PCR testing has limits because it only tests for a handful of mycoplasma species and primarily focuses on diagnosing acute respiratory or genital mycoplasma infections — not chronic, low-grade infections.

Female forensic technician collecting biological specimen in DNA

Another problem with diagnosing mycoplasma is that conventional science does not recognize chronic mycoplasma infections as being significant. Even though mycoplasma is commonly found in association with chronic degenerative diseases, it’s also found in one-third to two-thirds of any population without causing symptoms. In other words, it is assumed that mycoplasma just happens to be there but isn’t really a contributing factor in disease.

This type of thinking is simply a reflection of not understanding how stealth microbes operate. Mycoplasma does not cause disease unless it has an opportunity to do so. Individuals with a healthy immune system can harbor mycoplasma and suffer few ill effects. If immune function is disrupted by environmental factors or a coinfection with other stealth microbes, however, mycoplasma can definitely contribute to chronic disease.

When testing for mycoplasma, it is best to order a complete PCR mycoplasma panel, which will include:

  • M. fermentans
  • M. genitalium
  • M. hominis
  • M. penetrans
  • M. pneumoniae
  • M. synoviae
  • Ureaplasma urealyticum

But these are only the commonly-known species of mycoplasma; other lesser-known species could also be present.

Another problem with testing is that other stealth microbes can be associated with chronic infections with similar symptoms of mycoplasma infection, adding confusion to the clinical picture of what’s making a person ill. The list of knowns includes:

  • Yersinia enterocolitica
  • Chlamydophila pneumoniae
  • Chlamydia trachomatis
  • Campylobacter jejuni
  • Babesia
  • Bartonella
  • Ehrlichia
  • Anaplasma

Laboratories that test for mycoplasma include Medical Diagnostic Laboratories (MDL)and Armin Labs. Your healthcare provider may have additional recommendations for you.

But complete testing for the full range of all stealth microbes can cost hundreds or even thousands of dollars. Possibly the best course of action is assuming mycoplasma and other stealth microbes are there.

Stealth microbes only cause problems when immune function is suppressed. Addressing the causes of the underlying chronic immune dysfunction that allowed mycoplasma to flourish in the first place is the most effective solution for overcoming chronic infections.

Conventional Medical Solutions

The nature of mycoplasma makes it very resistant to conventional therapies. Many antibiotics target cell walls; since mycoplasma doesn’t have one, several classes of antibiotics are ineffective against the microbe. Some other antibiotics (doxycycline, erythromycin, clarithromycin, or azithromycin), block internal functions of bacteria and have some activity against mycoplasma, but activity is limited by the fact that mycoplasma bacteria only live inside cells where antibiotics have minimal penetration.

When it comes to chronic mycoplasma infections, the best approach is supporting the body’s natural healing potential.

Natural Solutions for Mycoplasma

Natural herbal therapy is the best therapeutic alternative for chronic mycoplasma. Herbs (especially medicinal mushrooms) work by:

  • Suppressing cytokine cascades
  • Reducing inflammation
  • Restoring normal immune function
  • Suppressing a wide range of covert pathogens

Consider the following herbs to get you started:

Cordyceps mushroom

Cordyceps (Cordyceps sinensis)

Native to Tibet, cordyceps is a medicinal mushroom that reduces cytokines and normalizes immune system functions. It is highly protective of cells, which reduces invasion by microbes.

Suggested dosage: 1-3 grams (1,000-3,000 mg) of whole mushroom cordyceps powder or 400-800 mg extract (standardized to >7% cordyceptic acid is preferred) two to three times daily.

Side effects: Mild nausea can occur, but in general, side effects are rare, even with higher doses. Allergic reactions are rare.

Chinese Skullcap purple flowers

Chinese Skullcap (Scutellaria baicalensis)

When combined with other herbs, Chinese skullcap has potent synergist properties. Additionally, it has strong antimicrobial and immunomodulating properties that are beneficial for suppressing mycoplasma and protecting tissues and organs infected with the microbe.

Suggested dosage: 400-1,000 mg two to three times daily. Root extract standardized to >30% baicalin is preferred. Note: American skullcap does not offer the same antimicrobial properties and should not be substituted.

Side effects: Gastrointestinal upset can occur, but side effects tend to be rare, even at high doses.

white Bidens flowers

Bidens (Bidens pilosa)

The herb offers potent antimicrobial and anti-inflammatory properties against mycoplasma, affecting mucous membranes of the body.

Suggested dosage: Bidens is most potent when prepared as an alcohol tincture. The dose may vary depending on the company, but tinctures are an excellent way to begin at a low dose and increase drops as tolerated.

Side effects: Some plants can be contaminated with heavy metals, so make sure you purchase the product from a reputable company that takes steps to minimize exposure. You should not take this plant if you are diabetic, as it can cause fluctuations in blood glucose or insulin levels.

Houttuynia white flower

Houttuynia (Houttuynia cordata)

Native to India and Nepal, houttuynia is a potent antiviral with activity also against mycoplasma.

Suggested dosage: The dose may vary depending on a company’s preparations.

Side effects: The herb can have a fishy smell but is otherwise well tolerated.

budding Anamu stem

Anamu (Petiveria alliacea)

Found in tropical, Amazonian regions of Central and South America, anamu offers excellent antimicrobial coverage for mycoplasma.

Suggested dosage: The daily dose of powdered herb is 1,000-2,000 mg twice daily.

Side effects: Note that anamu will give urine and feces a strong garlic-like odor. Generally, the herb is safe and well-tolerated, but it should be avoided in pregnancy.

Mullaca leaf berry

Mullaca (Physalis angulata)

Mullaca is another Amazonian herb with antimicrobial qualities to fight mycoplasma, and it works well as a complement to anamu. It can be found online as a loose powder (add it to smoothies or make your own capsules) or a tincture.

Suggested dosage: The daily dose for powdered herb is 1,000-2,000 mg twice daily.

Side effects: The herb is generally regarded as safe, however, it should be avoided during pregnancy or breastfeeding.

The Bottom Line

In addition to herbal therapy, the optimal path to recovery from chronic mycoplasma involves eliminating artificially-processed foods in favor of whole, nutrient-dense meals, reducing exposure to toxins, and managing chronic stress — all of which disrupt immune function and pave the way for stealth microbes to flourish. By minimizing these factors and implementing a comprehensive herbal therapy protocol, you can begin to curb chronic mycoplasma infections and support your body in the healing process.

Dr. Rawls is a physician who overcame Lyme disease through natural herbal therapy. You can learn more about Lyme disease in Dr. Rawls’ new best selling book, Unlocking Lyme.
You can also learn about Dr. Rawls’ personal journey in overcoming Lyme disease and fibromyalgia in his popular blog post, My Chronic Lyme Journey.

REFERENCES
1. K Waites and D Talkington, Mycoplasma pneumoniae and its Role as a Human Pathogen, Oct 2004, Clinical Microbiology Reviews
2. Hakkarainen, Turrunen, Miettinen, Kaitik, and Jannson, Mycoplasmas and Arthritis, Ann Rheu Dis, 1992, Oct 5 (11): p. 1170-1172
3. Baseman, Joel, et.al., Mycoplasmas: Sophisticated, Reemerging, and Burdened by Their Notoriety, CDC, Journal of Infectious Diseases, Vol 3, No.1, Feb 1997
4. Leslie Taylor, ND, Mycoplasmas – Stealth Pathogens (Review article), Jan 2001
5. Razin, Yogev, Naot, Molecular Biology and Pathogenicity of Mycoplasmas, Microbiol Mol Biol Rev, 1998, Dec; 62(4): p. 1094-1156
6. J Rivera-Tapia, N Rodriguez-Preval, Possible role of mycoplasmas in pathogenesis of gastrointestinal diseases, Rev Biomed 2006 17: 132-139
7. Berghoff, W, Chronic Lyme Disease and Co-infections: Differential Diagnosis, Open Neurol J., 2012, 6, p. 158-178
8. Gilroy, Keat, Taylor-Robinson, The Prevalence of Mycoplasma fermentans in patients with arthritides, Rheumatology, Vol 40 (12), p. 1355-1358
9. Zhang et al, Mycoplasma fermentans infection promotes immortalization of human peripheral blood mononuclear cells in culture, Blood 104 (13), p. 4252-4259
10. Walter Berghoff, Chronic Lyme Disease and Co-infections: Differential Diagnosis, Open Neurol J, 2012, 6: p. 158-178
11. Buhner S H, Healing Lyme Disease Coinfections, Healing Arts Press, Copyright 2013 http://www.cdc.gov/pneumonia/atypical/mycoplasma/index.html
12. Libbey JE, Cusick MF, Fujinami RS. Role of pathogens in multiple sclerosis. Int Rev Immunol. 2014;33(4):266-283. doi: 10.3109/08830185.2013.823422
13. BJMP 2009:2(4) 20-28
14. Huang S, Li JY, Wu J, Meng L, Shou CC. Mycoplasma infections and different human carcinomas. World J Gastroenterol. 2001;7(2):266-269. doi: 10.3748/wjg.v7.i2.266
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Powassan Virus in Children

https://danielcameronmd.com/powassan-virus-in-children/

CASE REPORTS: POWASSAN VIRUS IN CHILDREN

powassan-virus-in-children

Powassan virus (POWV) is a tick-borne illness that can cause severe encephalitis. Animal studies have shown the virus can be transmitted to humans following a tick bite within 15 minutes. However, the cases described in a recent article “Powassan Virus Encephalitis Following Brief Attachment of Connecticut Deer Ticks” by Feder et al. “strongly suggest that infected ticks may also rapidly transmit POWV to people.” [1]

Powassan virus in children is not often reported. In this article, the authors describe two cases involving infants with tick bites who developed Powassan virus encephalitis. As the authors point out, their case report not only demonstrates that rapid transmission of POWV can occur, but it highlights the importance for parents/caregivers to follow tick bite prevention methods. In these cases, adults unknowingly exposed their children to ticks infected with Powassan virus.

Powassan virus encephalitis in two children

A 5-month-old child was hospitalized after experiencing fevers for two days, along with vomiting and facial twitching which progressed to seizures. Two weeks prior to the onset of symptoms, a tick was removed from the infant’s forehead. Test results for the Powassan virus were positive.

The second case involved a 2-month-old child who presented with a fever and listlessness for one day. “He then developed left sided focal seizures (rhythmic left arm twitching, facial deviation to the left, and tongue thrusting with lip smacking),” the authors write.

A tick was removed from the infant’s arm approximately two weeks before he was hospitalized. The parents believed the father or dog had brought a tick into the house following a walk outside. The tick was not engorged and had not fed for more than 24 hours, the authors report.

READ MORE: No neurologic damage in 3 children with Lyme disease and Powassan virus

“POWV infection was confirmed by a positive PRNT on both serum and CSF,” the authors explain.

“POWV infection of humans has been notable for the severity of both the acute disease and the long-term sequelae.”  In fact, chronic illness occurs in approximately 50% of patients, the authors report, with symptoms including hemiplegia [paralysis on one side of the body], wasting, personality changes, and headaches.

Adults unknowingly expose children

“The circumstances under which the 2 children reported here acquired infection require some comments that are pertinent to prevention of future cases,” the authors write.

Infants typically would not be exposed to tick bites. These cases demonstrate the importance in adopting tick bite prevention methods. Feder points out, “in both of our cases, parents presumably brought ticks into their homes after outdoor activities.”

In the first case, the father had been out walking in the woods and brushed off multiple ticks outside. He presumably brought a tick into the home. In the second case, a father had been walking outside with a dog. The family believed either the father or dog had brought the tick into the house.

Parents/caregivers should be educated about several preventative measures:

  • “Outdoor clothing may prevent access to skin, but the ticks may remain undetected and will crawl off the person when body heat is reduced, such as when a coat is removed.”
  • Parents should check for ticks more than once. “Because of searching for an optimal skin site, ticks will not immediately attach to a person.”
  • “Parents should be educated about the need to treat outdoor clothing with Permethrin, an effective mode of preventing tick bites … Contact with treated fabric will kill all ticks within 2 hours.”
  • “Parents should also be educated about the possibility that dogs could bring ticks into homes, and that these animals should be inspected after every outdoor exposure.”
  • “Most anti-tick preventives only work after a tick has attached to a dog [the tick needs to ingest the chemical], although there are collars that are impregnated with Permethrin or similar products that might repel or kill ticks.”

Editor’s Note:  Although the authors did not discuss treatment of the two infants, both recovered.

References:
  1. Feder HM, Telford S, Goethert HK, Wormser GP. Powassan Virus Encephalitis Following Brief Attachment of Connecticut Deer Ticks. Clin Infect Dis. 2020.

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**Comment**

Despite being told that all of this is “rare,” please remember that Powassan, along with numerous other tick-borne infections are not reportable illnesses; therefore, nobody has a clue about prevalence. Coppe Lab out of Wisconsin emphatically states Powassan is NOT rare:

For the last two years, Coppe Laboratories has dedicated a significant amount of time and resources to dispelling the myth that infection with Powassan virus, a virus transmitted by tick bite, is rare. The Centers for Disease Prevention and Control (CDC) reports only 100 cases of Powassan virus infection in the United States in the last 10 years. Indeed, that statistic gives the illusion that Powassan infection is rare. However, did you know that the only infections reported to CDC are those that are life-threatening, particularly cases causing severe inflammation of the brain like the case reported in LiveScience? Coppe has published three new papers in the last year that clearly show Powassan virus infection is not rare are at all,and until testing for this virus is included as part of tick-borne disease screening panels infections will continue to be underreported. Coppe’s Powassan Guide, which can be downloaded from the website, summarizes the findings from both tick and human Powassan prevalence studies, as well as defining the patient populations that would benefit most from Powassan testing.

For more:

Tick prevention:

https://madisonarealymesupportgroup.com/2019/04/12/tick-prevention-2019/

https://madisonarealymesupportgroup.com/2020/07/20/ticks-lyme-disease-information-for-families/

Remember, pets are called “Tick taxies” for a reason:  https://madisonarealymesupportgroup.com/2017/08/12/pet-owners-have-nearly-2-times-the-risk-of-finding-ticks/

Ticks Produce Antibiotic That Protects Them From Human Skin Bacteria

https://www.ucsf.edu/news/2020/12/419216/lyme-disease-ticks-produce-antibiotic-protects-them-human-skin-bacteria

Lyme Disease Ticks Produce Antibiotic That Protects Them From Human Skin Bacteria 

Gene Provides Protection During the ‘Really Risky Sport’ of Feeding on Blood

By Vicky Stein

Dec. 10, 2020

Ticks live dangerous lives, spending most of their time questing for a host across wildly different habitats and seasons. Once they encounter a reptile, bird, or a mammal like us, they become intimately connected with it – and all of its bacteria and viruses – for days on end. Though ticks are notorious for transmitting pathogens such as the Lyme disease bacterium, how does their immune system keep them safe from contracting pathogens themselves?

In a study published in Cell on Dec. 10, 2020, a research team led by UC San Francisco’s Seemay Chou, PhD, provides an answer to this mystery. The work, Chou said, reveals that ticks are exquisitely constructed blood-sucking machines, with immune systems specially tailored for this unique lifestyle. Their defense strategies are carried out both inside and outside their bodies, she said, killing even our resident microbes as they feed on us.

Five years ago, in work published in Nature, Chou and colleagues found a gene in tick DNA that produces a microbe-killing protein. In the new study, senior author Chou leveraged that discovery to show that, without the protection offered by this gene, ticks are vulnerable to infection with Staphylococcus, one of the most common types of “commensal” bacteria. These bacterial species carpet our skin surface, but generally don’t harm us.

“This is the first time anybody’s identified a natural pathogen of ticks, and established a mechanism for it,” said Chou, an assistant professor of biochemistry and biophysics at UCSF and Chan Zuckerberg Biohub Investigator whose work is supported by a Sanghvi-Agarwal Innovator Award. “Ticks pass more microbes to humans, livestock, and other animals than any other known arthropod, but now their own vulnerabilities are on the table.”

The tick gene in question, known as dae2, originally evolved in bacteria, where the protein it encoded worked as an offensive agent against other bacteria. Several hundred million years ago, right around the time that the ancestors of some of today’s ticks began feeding on blood, those ticks “stole” the gene, making it a part of their own genomes.

According to Chou, dae2 represents a rare example of so-called horizontal transfer of a gene from a bacterium to an animal, and the fact that this transfer occurred as blood feeding evolved might not be a coincidence.

“I’ve always wondered why blood-feeding is even a thing,” said Chou. Not only does blood take a lot of energy to process into useful food, but biting on and attaching to much larger animals “seems inherently like a really risky sport.” With a strong, dae2-enhanced immune system, she said, tick species could have flourished, expanding to fill their bloody ecological niche.

When she first began working with dae2 in Ixodes scapularis, the deer tick, Chou thought ticks’ acquisition of the gene must have something to do protection against tick-dwelling bacteria like B. burgdorferi, which causes Lyme disease in humans and other animals. In experiment after experiment, she and members of her lab tried to find a mechanism for the gene to inhibit this bacterium, until they had an epiphany.

It makes no sense for ticks to have acquired this immune effector to kill off the bacteria that it’s most notoriously known to stably associate with,” she said. So instead, the lab began the much more complicated process of looking for bacteria that ticks are not known to live with peaceably. When members of the lab, including co-first authors Beth M. Hayes, PhD, and Atanas D. Radkov, PhD, proposed exploring the idea that dae2 might protect against Staphylococcus bacteria, “I actually pooh-poohed the idea – I bet a beer against it,” said Chou.

But after the dae2 protein was introduced to a cloudy vial of cultured staph bacteria, Chou was shocked. “The tube went from murky to clear in like, a second,” she said. “I was kind of glad to have lost this bet. After two years of trying to figure out what was going on, it all started falling together.”

Now the team had a direction. As detailed in the Cell paper, the researchers embarked on a series of wide-ranging experiments, first comparing dae genes in a range of tick species with the bacterial tae genes from which they were originally derived. With these comparisons and high-resolution protein structures in hand, they used computer models of these proteins to compare their shape and orientation when they came in contact with molecules found in bacterial cell walls.

Next, they moved on to testing the proteins directly against actual molecules extracted from bacterial cell walls. While dae2 protein could quickly degrade this material, taken from common skin bacteria, Tae2 could not. Dae2 also killed a wide a range of bacteria, notably three very common species that are symbiotic partners of human skin.

The researchers then investigated whether dae2 could reach our skin. They found dae2 protein in tick salivary glands and saliva, and observed that, from there, the protein was transferred to the ticks’ blood meal hosts.

When Chou and the team cancelled out the effects of dae2 in a group of blood-fed ticks, using a technique known as RNA interference in some mice and immunizing other mice to the protein, they found higher levels of Staphylococcus bacteria than in ticks with the functioning protein. These ticks also stayed smaller and gained less weight than ticks with dae2.

“This is a new way of thinking about how ticks interact with microbes,” said Chou. Microbes borne by ticks cause disease in humans and animals worldwide, but that’s only half the story, she said. “Their commensal is our pathogen, and our commensal is their pathogen.”

Authors: Joining Chou, Hayes, and Radkov were Fauna Yarza, Sebastian Flores, Jungyun Kim, Ziyi Zhao, and Victoria Bowcut, all of UCSF; Katrina W. Lexa, of Denali Therapeutics, Liron Marnin and Joao H.F. Pedra of the University of Maryland School of Medicine; and Jacob Biboy and Waldemar Vollmer of Newcastle University.

Funding: The research was funded in part by grants from the NIH (R01AI132851, R01AI134696, R01AI116523), Research Councils UK (EP/T002778/1), the UCSF Program for Breakthrough Biomedical Research, and the Sandler Foundation. Additional support came from the Chan Zuckerberg Biohub, the Johnson & Johnson WiSTEM2D Award, the Pew Biomedical Research Foundation, and the Sangvhi-Agarwal Innovation Award. Yarza was supported by the National Science Foundation (1650113) and a grant to UCSF from the Howard Hughes Medical Institute through the James H. Gilliam Fellowships for Advanced Study program.

Disclosures: The authors declare no competing interests.

The University of California, San Francisco (UCSF) is exclusively focused on the health sciences and is dedicated to promoting health worldwide through advanced biomedical research, graduate-level education in the life sciences and health professions, and excellence in patient care. UCSF Health, which serves as UCSF’s primary academic medical center, includes top-ranked specialty hospitalsand other clinical programs, and has affiliations throughout the Bay Area.

Diagnosing and Treating Lyme: Podcast

https://canlyme.com/2020/09/02/new-podcast-dr-ralph-hawkins-shares-his-medical-expertise-and-hands-on-experience-diagnosing-and-treating-lyme-disease/

New Podcast: Dr. Ralph Hawkins shares his medical expertise and hands on experience diagnosing and treating Lyme disease

https://www.lookingatlyme.ca/2020/09/dr-ralph-hawkins-explains-the-challenges-of-detecting-lyme-disease-through-testing/  Podcast here

September 1st, 2020

In this episode of Looking at Lyme, Sarah speaks with Internal Medicine Specialist and Canadian Lyme expert, Dr. Ralph Hawkins. Dr. Hawkins has been treating Lyme patients in Canada for many years, gaining a wealth of knowledge about the disease. He recounts his introduction to the shortcomings of Lyme disease testing in Canada while treating a patient with a history of multiple previous tick bites, many common symptoms of Lyme disease, but a negative Canadian Lyme test. Dr. Hawkins had the patient’s blood tested at a University Lab in New York, revealing test band patterns consistent with Lyme disease. He referred this patient to Infectious Diseases colleagues for treatment, but quickly found out that the diagnosis of late stage Lyme disease is not generally recognized by the Infectious Diseases community. He was advised to not only drop this case, but to avoid other similar cases. The recommendation to avoid such patients sparked Dr. Hawkins’ curiosity and interest, inspiring him to dive deeply into the research and history of Lyme disease.

Dr. Hawkins walks us through the current testing protocols for Lyme disease in Canada, explaining why some patients with Lyme disease receive a negative test result. He explains the difference between current testing in Canada and tests done in other parts of the world, highlighting a test done in Germany that he often relies on when diagnosing patients, and touching on the approval process for such tests by Health Canada. Without better testing, Canadians with Lyme disease continue to fall through the cracks of the healthcare system. Dr. Hawkins refers to a recent analysis of Lyme diagnosis in Canada in which researchers speculate that in some areas, two thirds of Lyme cases go unreported. With this in mind he points out that, in light of the severity of untreated Lyme disease, a trial period of treatment for Lyme disease would be valid for certain patients with negative Canadian serology. Thank you Dr. Hawkins for walking with us down the bumpy road of Lyme disease testing and treatment in Canada!

Resources and notes

For more:  

Putting Lyme Disease on the Map

https://thetyee.ca/News/2020/08/31/Putting-Lyme-Disease-Map/

Putting Lyme Disease on the Map

BC says the debilitating disease isn’t a risk in much of the province. Advocates say that’s a myth and it’s putting people at risk.
Amanda Follett Hosgood 31 Aug 2020 | TheTyee.ca

On the BC Centre for Disease Control’s website, a map shows where Lyme disease exists in the province. It highlights isolated areas in the south, mostly focused around Vancouver Island and the Lower Mainland, extending as far north as Clearwater. In the north, there are pockets of “potential” around Williams Lake and in coastal areas.*

But the map, dated 2019, leaves vast swaths unmarked and the impression that Lyme disease is not a risk from tick bites in most of the province.** As a result, it can be hard to get your doctor to listen if you have Lyme symptoms and even harder to get a conclusive diagnosis.

Officially, Lyme, spread by bites from infected ticks, has only been positively diagnosed a handful of times in the northern three-quarters of the province.*** But some experts say that’s because its myriad symptoms — everything from joint pain to facial paralysis — are often misdiagnosed as illnesses like chronic fatigue, fibromyalgia, multiple sclerosis and early dementia. (See link for article)

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**Comment**

Great article highlighting how tick maps have only served to hurt patients for over 40 years.  It is high time researchers and doctors understand the limitations of these maps and while interesting, should NEVER be used to diagnose patients.  

But Muhammad Morshed, a clinical microbiologist with the BCCDC, says private labs are notorious for inaccurate results, with false positives reported up to 50 per cent of the time.

This belief is a HUGE problem.  The CDC used to have a blurb right on their website calling CLIA-certified labs “home-brewed.”  From the top down, our public health ‘authorities’, which by the way own patients on Lyme tests, are educating doctors that these smaller specialty labs, which have to jump through the toughest lab standards on the planet to be certified, are substandard.  Please see:  https://madisonarealymesupportgroup.com/2019/06/28/who-owns-the-elisa-patents/

As to ticks – the idea they only exist in certain areas needs to die.  Perhaps that used to be the case, but migrating birds and rodents are taking them everywhere.  Not to mention :  https://madisonarealymesupportgroup.com/2018/11/07/ticks-on-the-move-due-to-migrating-birds-and-photoperiod-not-climate-change/

Not to mention ticks have been dropped from airplanes:  https://madisonarealymesupportgroup.com/2019/07/31/tick-expert-admits-to-working-on-ticks-dropping-them-out-of-airplanes/