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Household bacteria will tell about your personal life

09.09.2015

Your personal secrets will quickly cease to be secrets if microbiologists take them up. Researchers at the University of Colorado at Boulder and North Carolina State University say the bacteria in your home can tell you how many people, men and women, live in your home and what kind of pets you keep.

Albert Barberan and colleagues collected dust samples from 1 homes across the United States. Dust was collected not from anywhere, but from the upper casing of the door frame - from where the dust, undisturbed by anyone, lies for weeks, months, and even years. Each time samples were taken from the door frame of the outer door facing the street and from one of the inner doors. The inhabitants of the houses themselves spoke in detail about themselves and their way of life.

In house dust, you can find a lot of bacteria and microscopic fungi, but the fungi found, according to the authors of the work, differed little from those that lived outside - they were simply brought from the street, and they were not associated with any features of life. On the contrary, a variety of bacteria from the doorpost clearly indicated whether the house was more male or female, and whether cats or dogs lived there.

If among the microbes the inhabitants of the skin Corynebacterium and Dermabacter prevailed, as well as Roseburia, which are usually found in feces, then the house, therefore, was predominantly male. In women's housing, there were fewer skin bacteria, but representatives of the vaginal microflora appeared. (Here, of course, one can draw an unflattering conclusion for men that differences in home microflora indicate that women simply wash more often and take better care of their skin.) Also, microbes could determine with 83 percent accuracy whether the owner of the house loves cats, and with 92 percent accuracy to say how it relates to dogs: in the "cat house" 24 characteristic feline varieties of bacteria prevailed, in the "dog" 56 other varieties prevailed.

Restoring the history of a house can be very necessary for criminalists, and here bacteria can provide an invaluable service. It is possible that in the near future, according to the "door microflora", forensic experts will learn to determine some other features of the character of permanent residents. True, the key word here is permanent. Dust, along with microbes, accumulates for a long time, and the information that we receive here refers to something long-term and stable - in other words, the home microflora is unlikely to "notice" a single visit by a robber.

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