Further reports (no. 4) on flies as carriers of infection.

Date:
1911
Catalogue details

Licence: In copyright

Credit: Further reports (no. 4) on flies as carriers of infection. Source: Wellcome Collection.

    27/52 (page 25)
    2. Feb. 22nd, 2 p.m.—7 flies fed on raptured segments contain- ing numerous ova. ” O 4 p.m.—2 flies examined ... Positive (400). „ 23rd, 12 noon.—2 flies 55 ... N egative. 5 p.m.—1 fly 55 ... ,,^ „ 24th, 2 p.m.—1 fly 55 ... Positive (2). 1 fly 55 ... Negative. 3. Feb. 23rd, 2 p.m. 6 flies fed on intact segments containing numerous ova. 2 flies examined ... Negative. 1 fly „ ... Positive (4). 4 p.m.—1 fly „ ... Negative. 26th, 11 a.m.—3 flies 5 p.m „ 24th, 11 a.m 4. Feb. 21st.—4 flies (3 Musca, 1 Fannia) fed on dried segments. „ 22nd.—2 Musca, and 1 Fannia examined ... Negative. „ 23rd.—1 Musca examined ... ... ... „ 5. Mar. 3rd, 10.0 a.m.—7 flies fed on intact segments containing numerous ova. 12.30 p.m.—1 fly examined ... Negative. 3.0 p.m.—Segments removed. 6.0 p.m.—1 fly „ ... Positive (1). 7.0 p.m.—2 flies „ ... Negative. „ 4th, 10.30 a.m.— 1 fly „ ... „ Fasces of other flies examined ... Positive (1). 3.0 p.m.— 1 fly „ ... Negative. ' „ 5th, 11.0 a.m.—1 fly „ ... „ 6. Mar. 3rd, 11.0 a.m.—6 flies fed on emulsion of segments containing numerous ova. 12.0 noon—Emulsion removed. 5.0 p.m.—1 fly examined ... Positive (1). 5.30 p.m.—1 fly „ ... „ (22). 7.0 p.m.—1 flv „ ... „ (312). Faeces of other flies examined ... „ (200). Rabbit (A) fed with ova recovered. „ 4th, 11.0 a.m.—1 fly examined ... Positive (171). Rabbit (B) fed with ova recovered. 6.0 p.m.—1 fly examined ... Negative. „ 5th, 11.0 a.m.—1 fly „ ... Positive (1). Faeces examined ... „ (4). „ 15th.—Rabbit (A) dead. No cysticerci. May 3rd.—Rabbit (B) killed. 23 Cysticercus pisiformis found in mesentery. The rabbits were less than a month old and were obtained from an isolated stock. They were themselves removed and isolated as early as possible. They were, therefore, in all probability uninfected to start with, and the fact that Rabbit (A) was found uninfected supports this presumption. Cysticercus pisiformis, the larva of Taenia serrata, takes about four weeks to develop.