From the total number of air-borne microorganisms present per m3 of air, 1.5% were found to contaminate a dairy product while being packed into a container with an opening of 100 cm2 if it was exposed for 60 s. This value was used to compile a proposed guideline of maximum acceptable number of air-borne microorganisms per m3 which, if complied with, could ensure that no significant air-borne contamination of the product being packaged would take place.
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http://dx.doi.org/10.1016/0168-1605(88)90088-8 | DOI Listing |
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