[Report 1928] / Monmouthshire County Council.

  • Monmouthshire County Council
Date:
1928
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1928] / Monmouthshire County Council. Source: Wellcome Collection.

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    to its chemical oomposition—a line of work which properly belongs to the County Analyst's Department, and which is dealt with under the vSale of hoods and Drugs Acts—but to ascertain by bacteriological methods the degree of cleanliness and wholesomeness of the milk at the time of its being sold to the consumer. The examinations undertaken in the case of each sample have been;— 1. The enumeration of the total number of bacteria. 2. The estimation of the B.Coli content. 3. The microscopical examination of the centrifugalized deposit for the detection of starch granules, gross particles of dirt, pus, blood, etc. 4. The microscopical examination of the cream and centrifugalized deposit for Tubercle bacilli. 5. Cultural examination for Diphtheria, Typhoid, Paratyphoid, and Dysentery bacilli. 6. Guinea pig inoculations for the detection of B. Tuberculosis. 7. In addition, the common antiseptics were always tested for qualita- tively, as naturally the presence of any of these bodies would have had an influence on the bacterioscopic picture. These were never found. Of the 477 samples of milk examined in the County Laboratoi’y 315 belong to this research, a, miich larger number than in the year 1927, viz., 223. From the results obtained, these 315 milks can be classified as follows:— 1. Those which conform to the standard laid down by the Ministry of Health for “ Certified Milks ” 23 2. Those which conform to the standard laid down for *' Grade A ” milks ... • ■ ■ ■ ... 100 3. Those which conform to the standard laid down for “ Grade A ” milk as regards the total number of bacteria, but contain B.Coli in 1/lOOcc though not in less ... ... 17 (This group would constitute borderline cases). 4. Those which are unsatisfactory in that they possess a high bacterial content (this in several cases numbering many millions), but are satisfactory in respect of their B.Coli content ... ... ... ... ... ••. • 60 5. Those which are unsatisfactory because of a high B.Coli content, though not containing more than 200,000 bac- teria per cc. ... ... ... ... •••• ••• 12 6. Those which are unsatisfactory on account of the high bac- terial content as well as a high B.Coli. content ... ... 103
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