Dead skin, sweat, and DUST MITES!!!

Le Déjeuner sur l'herbe
Creative Commons License photo credit: Banalities

I’m sure most of you have seen the commercial, I believe by Mattress Firm, where two men are replacing a woman’s mattress. They tell her that she should replace her mattress every 8 years because after that long, it doubles in weight from all of the dead skin, sweat, and dust mites. She them repeats, in a disgusted and frightened tone, DUST MITES?? That commercial drives me crazy because like any normal Entomologist I think, dead skin and sweat, eww gross!! I’m certainly not grossed out by the thought of dust mites.  They are, after all, decomposers that feed on things like dead skin cells. That might make you cringe, but they are basically little cleaning machines, like all decomposers. So I was wondering what would make people more upset about dust mites than they are about dead skin and sweat. SoI found out!

First a little bit about dust mites. The house dust mite is an arachnid, like all mites, that belongs to the order Acari. Acari also includes ticks. Mites are a very successful and diverse group of animals with about 42,000 species found all over the world. They can be parasites, predators, herbivores, detritivores, or decomposers. Unfortunately for them, many are considered to be pests on plants, animals, humans, and especially in the home, such as dust mites. House Dust mites (Dermatophagoides spp.) are very tiny, but visble without a microscope. The adults are typically about .4 millimeters in length. They are common in most households and feed off of organic debris, human skin cells and animal dander, which is what dust is mostly made up of, hence the name. For this reason, they are mostly found in places like beds, carpet, and other soft pieces of furniture.  They cause no harm to us and would go largely unnoticed if it weren’t for one thing. They are animals and when animals feed, they have to defecate.

The fecal matter of dust mites is highly allergenic due to some of the enzymes within it. Therein lies the problem. Many people have allergies ranging from annoying to severe and sometimes these allergies can induce asthma. Some of these chemicals are also present on partially digested pieces of dust. Most of these allergies can be treated with over-the-counter anti-histamines, but in more severe cases, a game plan may be needed. The idea, as with any pest, is to reduce harborage, or make it a less pleasant place to be. Wood or other hard floors are always a better choice than carpet because they are easier to clean thoroughly and dust mites cannot thrive in/on them. All soft furniture and bedding should be washed regularly. Ten minutes in a hot dryer is enough to kill all stages of dust mites because they are very sensitive to dessication, so the hot dry conditions in the dryer are lethal. Just like with any other pest, removal of clutter, dirt, and food sources usually does the trick. At least once a week, you should dust, vaccuum, wash all of the bedding and anything else washable. This will lead to a relatively mite-free home. If you do have asthma, there are certain mattresses and types of bedding that are actually mite proof!  If you don’t have allergies to dust mites, you can relax a little. Dust mites have been around for millions of years and are probably on most soft surfaces you come into contact with!  I’ve said before that people should just get used to the idea of tiny organisms crawling around and on us! Most people have microscopic mites living in their hair follicles that feed on dead cells and sebacious, or oil gland secretions. These are known as Demodex folliculorum or face mites. There are thousand of other organisms, but they keep us clean and healthy. Plus, they’re not nearly as gross as dead skin and sweat, eeew!

CW39 did a story on dust mites last night, and they interviewed me! Watch the video below.



Can’t see the video? Click here.

One thought on “Dead skin, sweat, and DUST MITES!!!

  1. I should also add that they are NOT responsible for doubling the weight of your mattress, like the commercial says. It is pretty much all of the dead skin and sweat!

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