Tens of thousands probably, sometime more, sometimes less. Control methods include vacuuming and reducing the humidity in your home. However, you can cover beds in mite proof materials, preferably without any chemicals (as these can be just as harmful). Unfortunately just reducing the humidity won't necessarily reduce the mite population in a bed. They (especially the males) huddle together to conserve moisture, hence ensure you air the bed well and take the opportunity on hot sunny days to get your pillows and duvets outside. Washing at 60°C (and it must reach these temperatures for 20 mins) can also significantly reduce both the allergen and dust mites numbers. Dyson did a test to prove this with their contrarotator washing machine, which was the first to pass the British Allergen Foundation approval for a wash cycle. I know as I developed the test with them whilst working at Dyson.
Do some homework before answering these questions a typical bed can house up to 10 million dust mites.
There may be many as 19,000 dust mites in one gram of dust, but usually between 100 to 500 mites live in each gram.
A pillow of only two years old may be composed of up to ten percent dust mite feces and carcasses.
the average bed has 150 million dust mites. So its gonna be a ridiculous number. Its a bit like saying how many bubbles have popped in the oceans since time began.
1,000,000 or more
Actually there isn't a real number for it. There are more dust mites in an average bed room then there are people on the planet.
There are more dust mites than there are people on the planet as of 2012.
69 in my bed giggity
10,000
dipididoda
over 6 billion
hi
no no no no no
18875
Its over 9000!
Many different types of alcohol are poisonous to insects. Ethyl alcohol is commonly used to exterminate dust mites and other insects.
10,000
Dust mites have thousands of neurons in their brain despite their small size. These are part of the central nervous system.
It is only eating your dead skin cells so it is not harming your live skin cells. Technicality, it's benefitting you - the problem arises when mites start living in your mattress and pooping. Many people are allergic to mite waste.
Not directly as they do not bite. They are not predatory and do not live on humans. They themselves are relatively harmless feeding on our skin. However their parts and especially their excrement is a potent allergen and can be very harmful to those with allergies to house dust. Hence indirectly I suppose they are harmful and can hurt us.