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Best known in Anglo-Saxon countries, the famous "5-second rule" says that one can safely consume a fallen fell food if it picks up within 5 seconds. counter strike If we can find a basis in fact, other parameters be taken into account, such as the nature of the food or the cleanliness of the floor. Awkward Hygiene
1 2 3 Next Page last Atlantico: The 5-second rule, which applies to foods often fell to the ground, she reports to popular folklore or she has a scientific reality? He counts the time really in the bacterial counter strike contamination?
Stéphane Gayet: When we look at the rules circulating in the public like that, you realize that there generally has a solid base on which are added elements that are less so. On a surface and in particular the soil, bacteria are adherent, because it is in their nature. Indeed, bacteria counter strike must first attach to a surface to colonize. These are microscopic unicellular beings who are forced to divide continually to survive: proliferate or disappear.
To make a surface sampling in order to count the bacteria, for example in a laboratory community kitchen, use is preferably a standardized technique on a flat surface is applied a so-called Petri dish "contact" 25 cm2 area filled with a sterile agar to the brim and with the push of a mass of 500 grams for 10 seconds. This mass and this duration are needed for a "breakout" of bacteria can be carried out from their support, the surface. It is still only very partial: we speak of "breakout coefficient", which is low, so much less than 100%. This breakaway coefficient depends, besides the bacterial density of the surface, the viscosity and the porosity of the sampled surface.
It is thus seen by reference to the standard method, as time account. For the object in contact with the ground, if it is soft, moist, porous and viscous, crashes and the shape of the surface gradually as time passes. A duration of 5 seconds is a really counter strike short time so that the tearing of bacteria can be significant. But the tearing is very variable depending on the one hand, the mechanical characteristics of the object, therefore of the food in the case of interest, and, on the other, the physical characteristics of the surface.
It depends counter strike on the soil in question. In general, soil bacteria are not pathogenic, that is to say, they are not dangerous to humans: these are bacteria called telluric (earth) or saprophytes (if feeding on decaying vegetation). Pathogenic bacteria to humans are the main reservoir for the human body (Staphylococcus aureus, streptococcus, pneumococcus, Haemophilus influenzae, Clostridium counter strike difficile, meningitis, diphtheria bacillus, bacillus tuberculosis, leprosy bacillus ...) or animal (salmonella, Listeria, Campylobacter, Pasteurella ...). Both bacteria pathogenic to humans and terrestrial or water are therefore only a very small minority (primarily legionella). counter strike Thus, the bacterial dangerous ground for man, when it exists, comes mainly from animal droppings, which should be added certain arthropods (insects, etc.) that can carry human bacteria (cockroaches counter strike or cockroaches in particular).
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Stéphane Gayet's infectious disease physician at the regional officer of Alsace fight against nosocomial infections antenna (ARLIN Alsace), hospital practitioner at the Strasbourg University Hospitals (HUS or University Hospital of Strasbourg) and lecturer at the University of Strasbourg.
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