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309
The following table summarises the results of the bacteriological
examination of ordinary milk samples taken under the Milk
and Dairies (Consolidation) Act, 1915, from 1st January to 31st
December. 1926:—
ORDINARY MILK.
Present.
Absent.
Over 200,000
per c.c.
Under 200.000
per c.c.
Present in
100 c.c.
Absent from
100 c.c.
Present.
Absent.
Present.
Absent.
Exceeding a
trace.
Not exceeding
a trace.
Tuberclc bacillus
2
245
Total No. of bacteria
19
228
Bacillus Coli
102
145
Blood
...
247
Pus
...
247
Detritus
...
247
2
245
19
228
102
145
...
247
...
247
...
247
The above 247 samples of ordinary milk contained total bacteria
per c.c. as follows:—
1,000 — 5,000 8
5,000 — 10,000 25
10,000 — 20,000 34
20,000 — 30,000 20
30,000 — 40,000 18
40,000 — 50,000 25
50,000 — 100,000 78
100,000 — 150,000 17
150,000 — 200,000 3
200,000 — 250,000 1
250,000 — 750,000 9
750,000 — 1,000,000 4
1,000,000 — 2,000,000 5
247
There is no standard fixed for total bacteria per c.c. in
ordinary commercial milk, but comparing the results with the
Grade A standard, i.e. 200,000 per c.c., it will be seen that 228
of the samples contained total bacteria below that standard. It
has to be remembered that a large proportion of this milk has
been subjected to commercial pasteurisation.
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