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

  • Manson, Patrick, Sir, 1844-1922.
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. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    ILLUSTRATIONS. ■—Uv^JyiVjASktr*— PLATE I (Frontispiece). Fig. 1.—Four filarise, as seen ia the blood, at an enlargement of about 70 diameters. Fig. 2.—A filaria at an enlargement of about 270 diameters. The granular appearance of the body is a post-mortem change. Fig. 3.—Filaria at an enlargement of about 270 diameters, staiaed with anilin, showing partial retraction from external sheath. PLATE 11. Metamohphosis of the Filabia est the Mosgtjito. When the number of hours is alluded to, it is meant to express only the number of hours from the time the mosquito was captured to the time its abdomen was opened. As it would be impossible to say when a given mosquito fed, whether early in the evening, at midnight, or towards morning, a latitude of from one to nine hours must be granted in estimatiag the time the filaria has been subjected to the influence of its intermediary host. Fig. 1.—The filaria a short time after ingestion by the mosquito. Movements vigorous, but slowing down. Lash, and oral movements distinct. Fig. 2.—Movements very languid; sheath separated by an appreciable interval from the body, which is transversely striated: from three to six hours after ingestion. Fig. 3.—Eight hours : Movements still more languid; the sheath has disappeared; transverse striation and oral pouting very dis- tinct. I note of a specimen examiaed about twenty-six hours after Lugestion: '' Many specimens dead; one more active than the others showed oral movements; the trans- verse striation distinct, and inside this many dark and shining specks seen moving as if in a fluid. *