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227 [1899
Thus out of 12 milks available for complete testing, 1, or 8.3
per cent., contained the tubercle bacillus, while 2, or 16.3 per cent.,
showed suspicious signs.
As regards farmers' milks:—
Milks obtained from farmers 178
Tests void 73
Positive results, bacilli found 14
Suspicious results, but bacilli not found 16
Thus out of 105 milks available for complete testing, 14, or 13.3
per cent., contained the tubercle bacillus, while 16, or 15.2 per cent.,
showed suspicious signs.
The report of the Jenner Institute is as follows:—
JENNER INSTITUTE OF PREVENTIVE MEDICINE.
Chelsea Gardens,
Grosvenor Road, London, S.W.
October 7th, 1899.
Report upon 200 Samples of Milk and Cream examined on behalf of the Vestry of
Saint Mary, Islington.
To A. E. Harris, Esq.,
Medical Officer of Health,
Vestry Hall, Upper Street, N.
Sir,
We beg to report that we have completed the examination of the samples
of milk and cream forwarded by you to this Institute with the request that they
should be examined for the presence of the tubercle bacillus.
The total number of samples examined was 200. In each case the sample was
received on the day of collection.
The accompanying table gives a full account of the results we obtained:—
The naked eye examination in several cases revealed an unwarrantable contamination
with foreign matter. We have duly noted in our results those samples
of bad quality in this respect. An immediate microscopical examination of each
sample was made, but in every case the only absolute test for the presence of the
tubercle bacillus was made, viz., an inoculation experiment. It is on these inoculation
experiments that our report is based.