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Thirty-two samples proved to be tuberculous, but of these 23
were from supplies from which previous tuberculous samples
had been taken and which were at the time the subject of action
by the Authorities concerned and therefore could be taken to be
duplicate samples. The milk came principally from farms in
East Sussex, but other sources of supply were Surrey, Somerset,
Wiltshire, and a farm in the Borough. The Authorities concerned
were notified that samples of milk taken had been shown
to contain tubercle bacilli and enquiries were made with a view of
tracing the cows involved. A considerable number of cows were
examined by the Authorities' Veterinary Officers, suspected
animals isolated and samples taken, and as the result of their
investigations seven animals were dealt with under the Tuberculosis
Order, 1925. In six cases it was ascertained that the milk
was a mixed supply coming from a considerable number of farms,
and much difficulty is met with in these cases in locating affected
animals. At the end of the year investigation was still proceeding
in five cases.
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, 1930 :—