Microbiologists from Northern Arizona University in Flagstaff found that the human skin is one of the main sources of germs on surfaces inside office rooms (e.g. the floor). It turned out that within one city community of bacteria in different buildings are the same but differ between cities.
Microbiologists from Northern Arizona University in Flagstaff found that the human skin is one of the main sources of germs on surfaces inside the office premises (e.g., floor, furniture and office equipment). It also turned out that within one city community of bacteria in different buildings are the same but differ between cities. The study is published in the journal of mSystems. Press release available on the website EurekAlert!
Scientists took samples from nine office buildings in three North American cities: Flagstaff, San Diego and Toronto. In every office set up three tanks for sampling: one at ground and the other near the ceiling and the third near the wall. Containers contain one of three fillings that match the habitat of microorganisms: the pieces of painted drywall, ceiling tiles or carpet. The researchers also used sensors to monitor environment conditions: humidity, lighting and temperature.
The samples were collected during the year, six weeks per season. Researchers have decoded the DNA of selected microbes and found that in each case Paul was characterized by a richer microbial community than other places. Scientists explained this by the fact that office workers bring bacteria and fungi in shoes. In addition, the species composition of bacteria differed among the cities, however, was approximately the same among areas of the same city, despite the variety of ventilation systems.
In order to determine the specific sources of microbes, biologists collected samples from the skin of the nose and mouth, and feces of 11 staff at one location in Flagstaff, as well as others in other cities. The researchers found that human skin was determined 25-30 percent of the composition of the microbiome on the surface of the premises. At the same time, a major factor of bacterial diversity was environment.