Aids to pathology.

  • Campbell, Harry (Physician)
Date:
[1910]
Catalogue details

Licence: In copyright

Credit: Aids to pathology. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    through the walls of the small veins; they thus gain entrance into the rectum or bladder, whence they are discharged with the fneces and urine. A good deal of oozing of blood from the mucous surfaces may be caused by the migration. The ova cannot mature whilst in the body, but if placed in water, or if the urine containing them be diluted with water, the capsules then burst, and the ciliated embryos are set free. As regards the intermediate host nothing is known. Analogy with the history of the other nematodes would suggest that the embryo enters some fresh-water animal, in whose body it undergoes a further developmental change. Infection in man is probably through drinking contaminated water. Some maintain that the embryos enter the urethra or anus during the act of bathing. The effect of the parasite is to cause endemic hcema- turia, as also the passage of blood from the rectum. Condylomata may develop both inside and outside the anus, and for this reason the case may be mistaken for syphilis. The period of incubation which elapses between infec- tion and the appearance of ova in the m-ine, would appear to exceed four months.