. Bacteriological methods in food and drugs laboratories : with an introduction to micro-analytical methods . Bacteriology; Food; Drugs. DIRECT EXAMINATION 55 processes are left to nature the result is not by any means uniform and we have products which are often so vitiated by the develop- ment of undesirable associated organisms as to make the food unfit for use. There is a definite biological relationship between those organisms which initiate desirable fermentations and those which are objectionable; both kinds are generally present, but fortunately. Fig. 15.—Vinegar eels from decomposed b
. Bacteriological methods in food and drugs laboratories : with an introduction to micro-analytical methods . Bacteriology; Food; Drugs. DIRECT EXAMINATION 55 processes are left to nature the result is not by any means uniform and we have products which are often so vitiated by the develop- ment of undesirable associated organisms as to make the food unfit for use. There is a definite biological relationship between those organisms which initiate desirable fermentations and those which are objectionable; both kinds are generally present, but fortunately. Fig. 15.—Vinegar eels from decomposed blackberry pulp. The small particles scattered through the field are yeast cells. Bacteria were also present but they do not show in the illustration.—-{Howard, Yearbook U. S. Dept. of Agriculture, 1911.) the desirable or beneficent forms overgrow the objectionable forms very rapidly, but not always. It should be one of the prin- cipal efforts of the food and drugs bacteriologist to isolate and identify the organisms which are desirable in the production of fermented food products and those which are unquestionably undesirable and objectionable, for in these products it is not a question so much of quantity as of quality of the organisms Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Schneider, Albert, 1863-1928. Philadelphia : P. Blakiston's Son & Co.
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