Further preliminary reports on flies as carriers of infection.

Date:
1909
Catalogue details

Licence: In copyright

Credit: Further preliminary reports on flies as carriers of infection. Source: Wellcome Collection.

    13/46 (page 11)
    Ten (28*5 per cent.) [group I.] correspond in their fei’mentation reactions to B. acidi lactici (Hiippe), 6 (17T per cent.) [group II.] to B. coll communis (Escherich), 15 (42’8 per cent.) [group HI.] to B. neopolitanus or B. coU communior (Durham), and 4 (11’4 per cent.) [group IV.] to B. Idctis aerogenes (Escherich). The following table indicates the distribution of these organisms. Organisms found in groups Flies examined. No. Total. I. II. III. IV.. House flies ... 94 8 6 4 2 20 (2T2 per cen t.) Surface cultures 38 6 4 4 2 16 (42-1 „ ) Intestine cultures 56 2 2 — — 4 ( 7-1 „ ) Small flies ... 38 2 — 8 — 10(26 3 ) Surface cultures 16 — — 4 — 4 (25-0 „ ) Intestine cultures 22 2 — 4 — 6 (27-2 „ ) Blue-bottles 14 — — 2 2 4 (28-5 „ ) Surface cultures 6 — — — 2 2 (33-3 ) Intestine cultures 8 — — 2 . 2 (25 0 „ ) Stomoxys calcitrans 2 — — 1 — 1 (50-0 ) Intestine cultures 2 — — 1 — 1 (50-0 ) Total surface cultures 60 6 4 8 4 22 (36'6 per cent.) „ intestine cultures 88 4 2 7 0 13 (14-7 „ ) Complete total 148 10 6 15 4 35 (23'6 per cent.) Flies were obtained from the following sources :—(i) From the neighbourhood of decaying animal matter at Cambridge, (2) from a railway siding at Islington, at which manure was being loaded into trucks, (3) from a room used by the men of a gas-works, (4) from a house 40 yards distant from the Bermondsey glue works, (5) from the kitchen of a London County' Council School, and (6) from a house about 50 yards distant from the Bermondsey jam factory. The results of the examinations of the flies from each source is given in the following table :— No. examined. | Ti o 4-3 o 0> qn Organisms found in groups. Remarks. 6 I. II. Ill IV. (1) From Cambridge : Houseflies ... 10 6 1 Surface cults. 4 2 — 2 — Intestine cults. ... 6 4 2 2 1 Small flies 10 6 — — — — 1 Surface cults. 6 2 — — 2 — 1 28 flies examined, Intestine cults. 4 4 2 — 2 — [ 15 (54'5 per Blue-bottles ... 6 2 — — — — 1 cent.) infected. Surface cults. 2 — — Intestine cults. ... 4 2 2 1 Stomoxys 2 1 — — i Intestine cults. ... 2 1 — — — — j