Excerpt from The Significance of the Colon Count in Raw Milk<br/><br/>That coli-like organisms are present in soil has been shown by Johnson and Levine who found them more prevalent in soils upon which crops were growing than in absolutely fallow areas receiving soil treatment. Aerogenes-cloacae types were found to be the pre dominant coli  like forms in the soil. It is apparent that the B. Aerogenes type found in air may be derived from various sources, and it is not inconceivable that the organisms of this type found in market milk produced under clean conditions are the descendants of those introduced into the fresh milk in extremely small numbers by means of air contamination. It is also possible to contaminate milk with organisms of the B aerogenes type by using unsterilized utensils.
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