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The Microflora of Hand Washed Milk Bottles
Author(s) -
Thomas S. B.,
King Kay P.,
Davies Angela
Publication year - 1966
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1966.tb03492.x
Subject(s) - bottle , food spoilage , food science , milking , microbiology and biotechnology , biology , bacteria , zoology , geography , genetics , archaeology
S ummary . The examination of a series of 713 milk bottles cleansed by hand washing at producer‐retailer farm dairies showed that though nearly 60% attained satisfactory bacteriological standards, about 30% gave high colony counts (>600/bottle), while coli‐aerogenes organisms were found in 17% and milk spoilage organisms in 25% of them. The microflora of efficiently cleansed bottles, with colony counts of <200/bottle, was dominated by micrococci and aerobic sporeforming rods. Only 3.7% of the 259 cultures from these bottles gave acid reactions in litmus milk in 72 h at 22°. Inefficiently cleansed bottles, with colony counts of >600/bottle, had quite a different type of microflora which was usually dominated by Gram negative rods (achromobacteria, nonfluorescent pseudomonads and flavobacteria). A much higher proportion (19%) of the 393 cultures from these bottles gave acid reactions in litmus milk.