The Filaria sanguinis hominis and certain new forms of parasitic disease in India, China, and warm countries / by Patrick Manson.

Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: The Filaria sanguinis hominis and certain new forms of parasitic disease in India, China, and warm countries / by Patrick Manson. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    PLATE II.—Continued. Fig. 4.—Dead and probably undergoing degeneration or digestion. Fig. 5.—Thirty-six hours after capture of mosquito: Movement inter- mitting, but distinct and often vigorous ; faint indication of a double outline; body granular; jointed nature of caudal appendage very evident. Fig. 6.—Thirty-six hours after capture : Tail distinctly differentiated ; breadth of body ^Vo-in. Specimens very similar to this were found up to sixty hours, with tail rather more dis- tinctly differentiated, a faint double outline, and an obscure convoluted-like arrangement in the interior of the body. Fig. 7.—Thirty-nine hours: Length, J^-in. ; breadth, -in. No mouth or striation visible ; faint double outline ; hardly any granules in interior, except about the head, where they are faint and fine; intermitting but vigorous flexion of the tail, and perhaps slight movement of body. Fig. 8.—Forty-nine hours : Specimens like this embedded in oily, white, digested-looking material. Still blood in mosquito’s stomach, but the embryos in this all dead. In the speci- men represented the body is thick and finely granular; the granules are shining, and have a faint though quite distinct movement. Fig. 9.—Fifty horn’s: Faint caudal movements; no striation, granula- tion, or structure of any sort visible. Fig. 10.—Sixty-three hours: Body homogeneous ; slight indication only of a tail; thicker and shorter ; one specimen shows faint indication of striation. To one slide water was added, and pretty vigorous movement followed, and the tail was again seen. PLATE III. Metamokphosis of the Filakia in the Mosquito—Continued. Fig. 1.—Seventy to ninety hours (4th day): Many specimens like that represented ; tail particularly distinct, some indication of a mouth with lips ; some specimens are quite structureless in the interior, whereas in others an indistinct convoluted appearance can be made out; all are quite motionless. ITg. 2.—5th day: Nearly all mosquitos are dead, their ova having- been deposited on the water. In a living mosquito embryos as at Fig. 1 ; in another mosquito many embryos as at Fig. 2 ; a distinct four-lipped mouth visible; with a high power a double outline is easily made out, and it becomes apparent that the tail is merely an integumental appendage. Indications of alimentary canal.