Broad diversity of viable bacteria in 'sterile' (0.2 microm) filtered water.


Filtration of liquids through 0.2-microm filters is a common and often-used method for the removal of microorganisms from heat-sensitive solutions. Such 0.2 microm filtrations are frequently referred to as 'sterile filtration', reflecting the general belief that all living organisms are excluded from the filtrate. However, it has been demonstrated that a… (More)


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