Development of chronic lung diseases, such as asthma, can to some extent stem from poor indoor air quality, which in turn can be caused by a lack of frequent vacuuming, according to an article by BJ Mandelstam in Cleanlink.
"The largest source of indoor air pollution is from the common dust mite. In 1993, John W. Maunder, Ph.D., director of the Medical Entomology Center at the University of Cambridge, United Kingdom, published a paper entitled “Carpets, House Dust Mites and Asthma” in which he states, “There is no longer room for serious doubt about the dominant role of the house dust mite in both the initial induction of asthma and in the subsequent triggering of wheezy attacks.”
"Asthmatics are not allergic to living mites but to the airborne feces of mites and, to a much lesser extent, to dead mites. Dr. Maunder states that although living mites are difficult to remove from carpet, their feces are readily removed from carpets by proper cleaning.
“'A carpet regularly cleaned will not and cannot contain enough allergen to affect people. The proper maintenance of carpet completely prevents trouble from that source,' he writes."
We monitor our clients' indoor air quality, using a hand-held airborne particle counter, which measures the number of particles, in the size range of most allergens, per liter of air. We do find that, in fairly tightly sealed buildings, we can greatly improve IAQ in those facilities that we are cleaning (and vacuuming) five nights per week; we tend to have little impact in those facilities that, for budget reasons, we only clean once or twice per week.
A questionable trade off: saving a bit on the janitorial service, in exchange for a less healthy workforce.

