View report page

25
The contrast with the previous period was all the more
marked w hen, during the 18th and 19th, 16 notifications
of the disease were received, the total notifications being
as follows: —
June 18th 11 cases
., 19th 5 „
„ 20th 5 „
„ 21st 6 „
„ 22nd nil
,, 23rd nil
,, 24th 4 cases
,, 25th and 26th nil
,, 27 th 1 case
„ 28th nil
,, 29th 1 case
From the incidence of the cases, it was at once
apparent that the eastern and western portions of the
District were attacked, and in the middle, separating the
two areas, was the almost immune Merton Park District.
Investigation, in the early 16 cases, into the possible
causes, showed that there was nothing in common' except
the milk, which had been supplied by two shops who had
their rounds in the eastern and western portions of
Merton, to 12 infected households, and accounting for 15
out of the 16 notified cases, one of the shops having supplied
7 and the other 8 infected cases. Further enquiries
elicited the fact that the milk supply of both these shops
was a common one, being obtained from one Dairy Company
in) the country.
The investigations of the notifications of the 20th and
21st revealed the same common cause, in that the whole
of the eleven notified cases derived their milk from that
source.