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109
Altogether, disinfection was carried out 429
times after scarlet fever, and, if the classification
given above be correct, "the breakdowns" were
equivalent to 3'0 per cent, of the whole. The cases
following such breakdowns numbered 15, or 3.0 per
cent. of the total number of cases recorded.
Diphtheria.—The cases of diphtheria and
membranous croup recorded during 1897 numbered
322 in all from 249 houses, the cases being distributed
as follows:—
From 195 houses 1 case each
„ 43 „ 2 cases
„ 6 „ 3 „
„ 3 ,, 4 ,,
„ 1 house, 5 „ and
„ 1 „ 6 „
In 44 out of the 54 groups of cases tabulated,
causes (a) and (or) (b) were operative. The groups
referred to are:—Nos. 1-11, 13-15, 18-23, 25, 27-30,
32, 34, 35, 39-54.
In 2, cause (c) was apparently operative, viz., in
Nos. 12 and 16.
Of the remaining cases, 5 require some special
mention, namely, Nos. 17, 26, 31, 37, and 38.
In group 17, the first patient was subsequently
certified not to have had diphtheria at all.
Of the four cases in group 26, the first had an
origin in this Parish, but the remaining three cases
were attributable to imperfect measures of isolation
and disinfection in another district. There were