[Report 1928] / Medical Officer of Health, Sheffield City.

  • Sheffield (England). City Council
Date:
1928
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1928] / Medical Officer of Health, Sheffield City. Source: Wellcome Collection.

    110/112 (page 104)
    tuberculous infection for 28 days, then tlie source of infection has been removed from 945 gallons in the case of country sami)les, and 819 gallons in the case of city samples per day for 28 days. In 1928, 31 country cows and 22 city cows were found to be suffering from tuberculosis of the udder by microscopical examination of the special samples. Thus 47,313 gallons (29,295 and 18,018) of milk were freed from infection, which otherwise would have been tubercle infected and consumed in the City. B.\cteriologic.vl Examinations for Tuberculosis made in foli.owing up Positive Mixed Samples, and in Ordinary Inspection of City Cows, during 1928. Total number of Sam])lcs taken from cows showing symptoms suspicious of tuberculosis of the udder ... ... ... ... ... ... 254 do. found positive microscopically ... ... ... ... ... ... 52 do. „ negative ,, ... ... ... ... ... ... 202 Of the 155 sent for the biological examination- id returned positive 141 ,, negative Thus definite results have been obtained from 207 samples of milk, and of these 66 have been proved definitely jiositive. Out of this 66, 52 were found microscopically, or a percentage of 78.7. 99 negative microscopic samples were not examined by the biological test, as the microscopical examination showed the presence of organisms other than Tubercle Bacilli, or other evidence was present that the disease in tlie udder from which the sample was taken was not of a Tuberculous nature. 17 samples of sputum from suspected tubercular cows were examined microscopically. 12 contained tubercle bacilli. 5 were negative. These microscopic examinations of milk samples in addition to clinical inspections and the examination of sputum, urine, etc., were carried out in the diagnosis of cows suffering from tuberculosis before slaughter under the Tuberculosis Order, 1925. Complaints are periodically received from customers in regard to their milk supply, either from the presence of some unusual colour such as blood or some abnormal taste. In such cases samples are taken by the Pood and Drugs Inspector and submitted to the Citj^ Analyst and to this laboratory. In this way it is often possible to detect abnormalities in the milk or the inclusion of the milk from a diseased cow. An insjiection of the herd and premises from which the milk was dispatched is then made and the cause of the complaint investigated. In the sampling of milk for chemical analj'sis under the new Regulations which came into force in September, 1925, viz., the 3rd Schedule of the Milk and Dairies (Consolidation) Act, Sec. 6, if a sample of milk is taken for analysis under the Sale of Pood and Drugs Act the owner may appeal to the Local Authority within 60 hours for a .sample of milk to be taken from his cows. The Inspector of the Local Authority who takes the sample at the dairy may take any steps he thinks necessary to satisfy him that the sample is a fair one of the milk when the cows are properly and fully milked. These samples are known as “appeal to the cow ” samples. They are of value in arriving at a decision as to the genuineness or otherwise of the original sample taken which was below standard. A notice requesting an appeal to the cow may be made by dairymen each time their milk is sampled for chemical analysis. In this connection 10 visits were made by the Assistant Veterinary Inspectors in company with the Pood and Drugs Inspector. The cows were examined at the completion of each milking and certificates given that the cows were properly milked when the appeal to the cow sample was taken. Corporation Stud. During the year 40 visits were paid to examine and treat honses in Corporation stables.