What are house dust mites and how do I know if I’m allergic to them?

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People often believe they are allergic to house dust. But of the 20% of Australians suffereing with allergies, a number are are actually allergic to microscopic house dust mites.

House dust mites belong to the same family as spiders and ticks. They measure just 0.2-0.3 mm, with 50 fitting on a single pinhead. They live for 65–100 days, and females lay 60–100 eggs in their life.

House dust mite
Some 50 house dust mites can fit on one pinhead. Choksawatdikorn/Shutterstock

House dust mites love temperate climates and humidity. They feed off the skin cells we and animals shed, as well as mould, which they digest using special enzymes. These enzymes are excreted in their poo about 20 times a day. They also shed fragments of their exoskeletons.

All these fragments trigger allergies in people with this type of allergic rhinitis (which is also known as hay fever)

shuttertock. PeopleImages.com – Yuri A/Shutterstock

What are the symptoms?

When people with house dust mite allergy inhale the allergens, they penetrate the mucous membranes of the airways and eyes. Their body recognises the allergens as a threat, releasing chemicals including one called histamine.

This causes symptoms including a runny nose, an itchy nose, eyes and throat, sneezing, coughing and a feeling of mucus at the back of your throat (known as a post-nasal drip).

People with this type of allergy usually mouth breath, snore, rub their nose constantly (creating a nasal crease called the “dust mite salute”) and have dark shadows under their eyes.

House dust mite allergy can also cause poor sleep, constant tiredness, reduced concentration at work or school and lower quality of life.

For people with eczema, their damaged skin barrier can allow house dust mite proteins in. This prompts immune cells in the skin to release chemicals which make already flared skin become redder, sorer and itchier, especially in children.

Symptoms of house dust mite allergy occur year round, and are often worse after going to bed and when waking in the morning. But people with house dust mite allergy and pollen allergies find their year-round symptoms worsen in spring.

How is it diagnosed?

House dust mite allergy symptoms often build up over months, or even years before people seek help. But an accurate diagnosis means you can not only access the right treatment – it’s also vital for minimising exposure.

Doctor talks to patient
Your clinician can talk you through treatment options and how to minimise exposure. Monkey Business Images/Shutterstock

Doctor and nurse practitioners can order a blood test to check for house dust mite allergy.

Alternatively, health care providers with specialised allergy training can perform skin prick tests. This involves placing drops of the allergens on the arm, along with a positive and negative “control”. After 15 minutes, those who test positive will have developed a mosquito bite-like mark.

How is it treated?

Medication options include one or a combination of:

  • daily non-sedating antihistamines
  • a steroid nasal spray
  • allergy eye drops.

Your health care professional will work with you to develop a rhinitis (hay fever) medical management plan to reduce your symptoms. If you’re using a nasal spray, your health provider will show you how to use it, as people often use it incorrectly.

If you also have asthma or eczema which is worsened by dust mites, your health provider will adapt your asthma action plan or eczema care plan accordingly.

If you experience severe symptoms, a longer-term option is immunotherapy. This aims to gradually turn off your immune system’s ability to recognise house dust mites as a harmful allergen.

Immunotherapy involves taking either a daily sublingual tablet, under the tongue, or a series of injections. Injections require monthly attendances over three years, after the initial weekly build-up phase.

These are effective, but are costly (as well as time-consuming). So it’s important to weigh up the potential benefits and downsides with your health-care provider.

How can you minimise house dust mites?

There are also important allergy minimisation measures you can take to reduce allergens in your home.

Each week, wash your bedding and pyjamas in hot water (over 60°C). This removes house dust mite eggs and debris.

Opt for doonas, covers or quilts that can be washed in hot water above 60°C. Alternatively, low-cost waterproof or leak proof covers can keep house dust mites out.

If you can, favour blinds and wood floors over curtains and carpet. Dust blinds and surfaces with a damp cloth each week and vacuum while wearing a mask, or have someone else do it, as house dust mites can become airborne during cleaning.

But beware of costly products with big marketing budgets and little evidence to support their use. A new mattress, for example, will always be house dust mite-free. But once slept on, the house dust mite life cycle can start.

Mattress protectors and toppers commonly claim to be “hypoallergenic”, “anti-allergy” or “allergy free”. But their pore sizes are not small enough to keep house dust mites and their poo out, or shed skin going through.

Sprays claiming to kill mites require so much spray to penetrate the product that it’s likely to become wet, may smell like the spray and, unless dried properly, may grow mould.

Finally, claims that expensive vacuum cleaners can extract all the house dust mites are unsubstantiated.

For more information, visit healthdirect.gov.au or the Australian Society of Clinical Immunology and Allergy.

Deryn Lee Thompson, Eczema and Allergy Nurse; Lecturer, University of South Australia

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Ayurveda’s Contributions To Science

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    Ayurveda’s Contributions To Science (Without Being Itself Rooted in Scientific Method)

    Yesterday, we asked you for your opinions on ayurveda, and got the above-depicted, below-described, set of responses. Of those who responded…

    • A little over 41% said “I don’t know what ayurveda is without looking it up”
    • A little over 37% said “It is a fine branch of health science with millennia of evidence”
    • A little over 16% said “It gets some things right, but not by actual science”
    • A little over 4% said “It is a potentially dangerous pseudoscience”

    So, what does the science say?

    Ayurveda is scientific: True or False?

    False, simply. Let’s just rip the band-aid off in this case. That doesn’t mean it’s necessarily without merit, though!

    Let’s put it this way:

    • If you drink coffee to feel more awake because scientific method has discerned that caffeine has vasoconstrictive and adenosine-blocking effects while also promoting dopaminergic activity, then your consumption of coffee is evidence-based and scientific. Great!
    • If you drink coffee to feel more awake because somebody told you that that somebody told them that it energizes you by balancing the elements fire (the heat of the coffee), air (the little bubbles on top), earth (the coffee grinds), water (the water), and ether (steam), then that is neither evidence-based nor scientific, but it will still work exactly the same.

    Ayurveda is a little like that. It’s an ancient traditional Indian medicine, based on a combination of anecdotal evidence and supposition.

    • The anecdotal evidence from ayurveda has often resulted in herbal remedies that, in modern scientific trials, have been found to have merit.
      • Ayurvedic meditative practices also have a large overlap with modern mindfulness practices, and have also been found to have merit
      • Ayurveda also promotes the practice of yoga, which is indeed a very healthful activity
    • The supposition from ayurveda is based largely in those five elements we mentioned above, as well as a “balancing of humors” comparable to medieval European medicine, and from a scientific perspective, is simply a hypothesis with no evidence to support it.

    Note: while ayurveda is commonly described as a science by its practitioners in the modern age, it did not originally claim to be scientific, but rather, wisdom handed down directly by the god Dhanvantari.

    Ayurveda gets some things right: True or False?

    True! Indeed, we covered some before in 10almonds; you may remember:

    Bacopa Monnieri: A Well-Evidenced Cognitive Enhancer

    (Bacopa monnieri is also known by its name in ayurveda, brahmi)

    There are many other herbs that have made their way from ayurveda into modern science, but the above is a stand-out example. Others include:

    Yoga and meditation are also great, and not only that, but great by science, for example:

    Ayurveda is a potentially dangerous pseudoscience: True or False?

    Also True! We covered why it’s a pseudoscience above, but that doesn’t make it potentially dangerous, per se (you’ll remember our coffee example).

    What does, however, make it potentially dangerous (dose-dependent) is its use of heavy metals such as lead, mercury, and arsenic:

    Heavy Metal Content of Ayurvedic Herbal Medicine Products

    Some final thoughts…

    Want to learn more about the sometimes beneficial, sometimes uneasy relationship between ayurveda and modern science?

    A lot of scholarly articles trying to bridge (or further separate) the two were very biased one way or the other.

    Instead, here’s one that’s reasonably optimistic with regard to ayurveda’s potential for good, while being realistic about how it currently stands:

    Development of Ayurveda—Tradition to trend

    Take care!

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  • In This Oklahoma Town, Most Everyone Knows Someone Who’s Been Sued by the Hospital

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    McALESTER, Okla. — It took little more than an hour for Deborah Hackler to dispense with the tall stack of debt collection lawsuits that McAlester Regional Medical Center recently brought to small-claims court in this Oklahoma farm community.

    Hackler, a lawyer who sues patients on behalf of the hospital, buzzed through 51 cases, all but a handful uncontested, as is often the case. She bantered with the judge as she secured nearly $40,000 in judgments, plus 10% in fees for herself, according to court records.

    It’s a payday the hospital and Hackler have shared frequently over the past three decades, records show. The records indicate McAlester Regional Medical Center and an affiliated clinic have filed close to 5,000 debt collection cases since the early 1990s, most often represented by the father-daughter law firm of Hackler & Hackler.

    Some of McAlester’s 18,000 residents have been taken to court multiple times. A deputy at the county jail and her adult son were each sued recently, court records show. New mothers said they compare stories of their legal run-ins with the medical center.

    “There’s a lot that’s not right,” Sherry McKee, a dorm monitor at a tribal boarding school outside McAlester, said on the courthouse steps after the hearing. The hospital has sued her three times, most recently over a $3,375 bill for what she said turned out to be vertigo.

    In recent years, major health systems in Virginia, North Carolina, and elsewhere have stopped suing patients following news reports about lawsuits. And several states, such as Maryland and New York, have restricted the legal actions hospitals can take against patients.

    But with some 100 million people in the U.S. burdened by health care debt, medical collection cases still clog courtrooms across the country, researchers have found. In places like McAlester, a hospital’s debt collection machine can hum away quietly for years, helped along by powerful people in town. An effort to limit hospital lawsuits failed in the Oklahoma Legislature in 2021.

    In McAlester, the lawsuits have provided business for some, such as the Adjustment Bureau, a local collection agency run out of a squat concrete building down the street from the courthouse, and for Hackler, a former president of the McAlester Area Chamber of Commerce. But for many patients and their families, the lawsuits can take a devastating toll, sapping wages, emptying retirement accounts, and upending lives.

    McKee said she wasn’t sure how long it would take to pay off the recent judgment. Her $3,375 debt exceeds her monthly salary, she said.

    “This affects a large number of people in a small community,” said Janet Roloff, an attorney who has spent years assisting low-income clients with legal issues such as evictions in and around McAlester. “The impact is great.”

    Settled more than a century ago by fortune seekers who secured land from the Choctaw Nation to mine coal in the nearby hills, McAlester was once a boom town. Vestiges of that era remain, including a mammoth, 140-foot-tall Masonic temple that looms over the city.

    Recent times have been tougher for McAlester, now home by one count to 12 marijuana dispensaries and the state’s death row. The downtown is pockmarked by empty storefronts, including the OKLA theater, which has been dark for decades. Nearly 1 in 5 residents in McAlester and the surrounding county live below the federal poverty line.

    The hospital, operated by a public trust under the city’s authority, faces its own struggles. Paint is peeling off the front portico, and weeds poke up through the parking lots. The hospital has operated in the red for years, according to independent audit reports available on the state auditor’s website.

    “I’m trying to find ways to get the entire community better care and more care,” said Shawn Howard, the hospital’s chief executive. Howard grew up in McAlester and proudly noted he started his career as a receptionist in the hospital’s physical therapy department. “This is my hometown,” he said. “I am not trying to keep people out of getting care.”

    The hospital operates a clinic for low-income patients, whose webpage notes it has “limited appointments” at no cost for patients who are approved for aid. But data from the audits shows the hospital offers very little financial assistance, despite its purported mission to serve the community.

    In the 2022 fiscal year, it provided just $114,000 in charity care, out of a total operating budget of more than $100 million, hospital records show. Charity care totaling $2 million or $3 million out of a $100 million budget would be more in line with other U.S. hospitals.

    While audits show few McAlester patients get financial aid, many get taken to court.

    Renee Montgomery, the city treasurer in an adjoining town and mother of a local police officer, said she dipped into savings she’d reserved for her children and grandchildren after the hospital sued her last year for more than $5,500. She’d gone to the emergency room for chest pain.

    Dusty Powell, a truck driver, said he lost his pickup and motorcycle when his wages were garnished after the hospital sued him for almost $9,000. He’d gone to the emergency department for what turned out to be gastritis and didn’t have insurance, he said.

    “Everyone in this town probably has a story about McAlester Regional,” said another former patient who spoke on the condition she not be named, fearful to publicly criticize the hospital in such a small city. “It’s not even a secret.”

    The woman, who works at an Army munitions plant outside town, was sued twice over bills she incurred giving birth. Her sister-in-law has been sued as well.

    “It’s a good-old-boy system,” said the woman, who lowered her voice when the mayor walked into the coffee shop where she was meeting with KFF Health News. Now, she said, she avoids the hospital if her children need care.

    Nationwide, most people sued in debt collection cases never challenge them, a response experts say reflects widespread misunderstanding of the legal process and anxiety about coming to court.

    At the center of the McAlester hospital’s collection efforts for decades has been Hackler & Hackler.

    Donald Hackler was city attorney in McAlester for 13 years in the ’70s and ’80s and a longtime member of the local Lions Club and the Scottish Rite Freemasons.

    Daughter Deborah Hackler, who joined the family firm 30 years ago, has been a deacon at the First Presbyterian Church of McAlester and served on the board of the local Girl Scouts chapter, according to the McAlester News-Capital newspaper, which named her “Woman of the Year” in 2007. Since 2001, she also has been a municipal judge in McAlester, hearing traffic cases, including some involving people she has sued on behalf of the hospital, municipal and county court records show.

    For years, the Hacklers’ debt collection cases were often heard by Judge James Bland, who has retired from the bench and now sits on the hospital board. Bland didn’t respond to an inquiry for interview.

    Hackler declined to speak with KFF Health News after her recent court appearance. “I’m not going to visit with you about a current client,” she said before leaving the courthouse.

    Howard, the hospital CEO, said he couldn’t discuss the lawsuits either. He said he didn’t know the hospital took its patients to court. “I had to call and ask if we sue people,” he said.

    Howard also said he didn’t know Deborah Hackler. “I never heard her name before,” he said.

    Despite repeated public records requests from KFF Health News since September, the hospital did not provide detailed information about its financial arrangement with Hackler.

    McAlester Mayor John Browne, who appoints the hospital’s board of trustees, said he, too, didn’t know about the lawsuits. “I hadn’t heard anything about them suing,” he said.

    At the century-old courthouse in downtown McAlester, it’s not hard to find the lawsuits, though. Every month or two, another batch fills the docket in the small-claims court, now presided over by Judge Brian McLaughlin.

    After court recently, McLaughlin, who is not from McAlester, shook his head at the stream of cases and patients who almost never show up to defend themselves, leaving him to issue judgment after judgment in the hospital’s favor.

    “All I can do is follow the law,” said McLaughlin. “It doesn’t mean I like it.”

    About This Project

    “Diagnosis: Debt” is a reporting partnership between KFF Health News and NPR exploring the scale, impact, and causes of medical debt in America.

    The series draws on original polling by KFF, court records, federal data on hospital finances, contracts obtained through public records requests, data on international health systems, and a yearlong investigation into the financial assistance and collection policies of more than 500 hospitals across the country. 

    Additional research was conducted by the Urban Institute, which analyzed credit bureau and other demographic data on poverty, race, and health status for KFF Health News to explore where medical debt is concentrated in the U.S. and what factors are associated with high debt levels.

    The JPMorgan Chase Institute analyzed records from a sampling of Chase credit card holders to look at how customers’ balances may be affected by major medical expenses. And the CED Project, a Denver nonprofit, worked with KFF Health News on a survey of its clients to explore links between medical debt and housing instability. 

    KFF Health News journalists worked with KFF public opinion researchers to design and analyze the “KFF Health Care Debt Survey.” The survey was conducted Feb. 25 through March 20, 2022, online and via telephone, in English and Spanish, among a nationally representative sample of 2,375 U.S. adults, including 1,292 adults with current health care debt and 382 adults who had health care debt in the past five years. The margin of sampling error is plus or minus 3 percentage points for the full sample and 3 percentage points for those with current debt. For results based on subgroups, the margin of sampling error may be higher.

    Reporters from KFF Health News and NPR also conducted hundreds of interviews with patients across the country; spoke with physicians, health industry leaders, consumer advocates, debt lawyers, and researchers; and reviewed scores of studies and surveys about medical debt.

    KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.

    Subscribe to KFF Health News’ free Morning Briefing.

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  • Intermittent Fasting for Women Over 50 – by Emma Sanchez

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    Intermittent fasting is promoted as a very healthful (evidence-based!) way to trim the fat and slow aging, along with other health benefits. But, physiologically and especially metabolically, the average woman is quite different from the average man! And most resources are aimed at men. So, what’s the difference?

    Emma Sanchez gives an overview not just of intermittent fasting, but also, how it goes with specifically female physiology. From hormonal cycles, to different body composition and fat distribution, to how we simply retain energy better—which can be a mixed blessing!

    We’re given advice about how to optimize all those things and more.

    She also covers issues that many writers on the topic of intermittent fasting will tend to shy away from, such as:

    • mood swings
    • risk of eating disorder
    • impact on cognitive thinking

    …and she does this evenly and fairly, making the case for intermittent fasting while acknowledging potential pitfalls that need to be recognized in order to be managed.

    Lastly, the “over 50” thing. This is covered in detail quite late in the book, but there are a lot of changes that occur (beyond the obvious!), and once again, Sanchez has tips and tricks for holding back the clock where possible, and working with it rather than against it, when appropriate.

    All in all, a great book for any woman over 50, or really also for women under 50, especially if that particular milestone is on the horizon.

    Get your copy of Intermittent Fasting for Women over 50 from Amazon today!

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Related Posts

  • What is silicosis and what does research say about it?
  • Health Tips for Males Too

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    It’s Q&A Day at 10almonds!

    Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!

    In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!

    As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!

    So, no question/request too big or small

    ❝Articles are very informative and helpful. Maybe it’s me but things seem to lean more toward females. That being said don’t forget us males❞

    Rest assured, we could never forget you! We try to make as much as possible of our content applicable to as many as possible of our readers, but of course not everything can be relevant for everyone.

    This is, presumably, in response to our recent feature on menopausal health, because previous to that, our next-most-recent main feature that centred women’s health was a month ago—that was about breast cancer, and did have a section on breast cancer in men too. You might also enjoy the book we reviewed recently about prostate health, or our regular sponsor offering testosterone therapy. Please feel free to check out our articles on saw palmetto against male pattern baldness and BPH, as well as mental health issues that disproportionally affect men.

    And of course, if you have specific questions/requests about men’s health (or any other health topic) we’re only ever an email away (or use the handy feedback widget, as you did to make this request)!

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  • Flax Seeds vs Pumpkin Seeds – Which is Healthier?

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    Our Verdict

    When comparing flax seeds to pumpkin seeds, we picked the flax.

    Why?

    Looking at the macros first, they are equal on protein, and flax seeds have a lot more fiber while pumpkin seeds have a lot more carbs. We’re going to prioritise fiber over carbs and call this a win for flax.

    In terms of vitamins, flax seeds have a lot more of vitamins B1, B2, B3, B5, B6, B7, B9, C, E, K, and choline, while pumpkin seeds have a tiny bit more vitamin A. An easy win for flax here.

    When it comes to minerals, flax has multiples more calcium, copper, iron, magnesium, manganese, phosphorus, and selenium, while pumpkin seeds have more zinc. Another win for flax.

    Adding up the sections makes for a clear overall win for flax, but by all means enjoy either or both; diversity is good!

    Want to learn more?

    You might like to read:

    What’s Your Plant Diversity Score? ← seeds count as plants!

    Enjoy!

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  • The Diabetes Drugs That Can Cut Asthma Attacks By 70%

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    Asthma, obesity, and type 2 diabetes are closely linked, with the latter two greatly increasing asthma attack risk.

    While bronchodilators / corticosteroids can have immediate adverse effects due to sympathetic nervous system activation, and lasting adverse effects due to the damage it does to metabolic health, diabetes drugs, on the other hand, can improve things with (for most people) fewer unwanted side effects.

    Great! Which drugs?

    Metformin, and glucagon-like peptide-1 receptor agonists (GLP-1RAs).

    Specifically, researchers have found:

    • Metformin is associated with a 30% reduction in asthma attacks
    • GLP-1RAs are associated with a 40% reduction in asthma attacks

    …and yes, they stack, making for a 70% reduction in the case of people taking both. Furthermore, the results are independent of weight, glycemic control, or asthma phenotype.

    In terms of what was counted, the primary outcome was asthma attacks at 12-month follow-up, defined by oral corticosteroid use, emergency visits, hospitalizations, or death.

    The effect of metformin on asthma attacks was not affected by BMI, HbA1c levels, eosinophil count, asthma severity, or sex.

    Of the various extra antidiabetic drugs trialled in this study, only GLP-1 receptor agonists showed a further and sustained reduction in asthma attacks.

    Here’s the study itself, hot off the press, published on Monday:

    JAMA Int. Med. | Antidiabetic Medication and Asthma Attacks

    “But what if I’m not diabetic?”

    Good news:

    More than half of all US adults are eligible for semaglutide therapy ← this is because they’ve expanded the things that semaglutide (the widely-used GLP-1 receptor agonist drug) can be prescribed for, now going beyond just diabetes and/or weight loss 😎

    And metformin, of course, is more readily available than semaglutide, so by all means speak with your doctor/pharmacist about that, if it’s of interest to you.

    Take care!

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