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These samples were also submitted to the test for coliform
organisms. Of these, the same two samples failed to pass the
test, coliform bacilli being present in one hundredth of a millilitre
in three tubes in each case.
"Accredited" milk. The number of samples which were
submitted to the methylene blue reduction test was five. All of
these samples passed the test. These samples were also submitted
to the coliform bacillus test, one of which failed to pass on account
of the presence of the coliform bacillus in one hundredth of a millilitre.
"Tuberculin Tested (Pasteurised)" milk. Of two samples
of this grade of milk submitted for examination, one passed the
test and one failed owing to the presence of excessive bacteria.
"Pasteurised" milk. During the year, 61 samples were
obtained, one of which failed to pass the prescribed test owing to
the presence of excessive bacteria.
Table V shows the results of biological tests in milk
samples over a period of ten years.