11.   Biological contaminants include bacteria, molds, mildew, viruses, dust mites, pollen and animal dander.

12.   - Allergens or irritants, such as pollen, dust mites, air pollution, animal dander.

13.   A novel bedding material can starve dust mites, tiny creatures that cause asthma, to death.

14.   Actually, it is not the microscopic dust mite itself that is the problem but rather proteins in the excrement of this ubiquitous animal.

15.   Allergies to a number of irritants, like dust mites, ragweed, mold and grass, were documented in all the children in this study.

16.   Allergies to inhaled substances like pollen, molds, dust mites and animal dander often touch off asthma attacks in susceptible people.

17.   But dust mites also need moisture.

18.   But for dust mites, we might be up to our knees in our own dead skin.

19.   Cigarette smoke, pet hair, dust mites and mold add to the load of indoor pollutants.

20.   Clearly, Ken Burns could make a documentary about the social life of the dust mite and I would watch it with unflagging fascination.