Eleven miscellaneous papers on animal parasites / [Ch. Wardell Stiles and others].

Date:
1902
Catalogue details

Licence: In copyright

Credit: Eleven miscellaneous papers on animal parasites / [Ch. Wardell Stiles and others]. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    diuo-iioses s> iven above. If no segments are found, a niicroscopic exami- nation of the feces will reveal nmnerous eggs, since this parasite belongs to a group of worms provided with a special uterine pore, through which the ova are constantly discharged. These eggs are entirely dif- ferent from those of the genus Taenia, being provided with an opercu- lum at one end. They may, however, be mistaken for eggs of certain other parasites. The forms which come into special consideration are Dibothrioc&phalus lakes (the broad Russian tapeworm), Fasciola hepatica (the common liver fluke), and Paragonimus Westermanii (the lung fluke). It will be somewhat difficult to distinguish the eggs (63/^ by 48 to 50m) of the Asiatic ta]Deworm {Dijylogonoyorus grandis) from those of the broad Russian tapeworm, which measure 68 to 70/^ by 44 to 45^; the eggs of Fasoiola hejjatica are much larger, namely, 105 to 145/< by 63 to 90/<; those of Paragonimus Westermanii are also larger, 68 to 118^ by 48 to 60/i, and are found both in the sputum and feces. In connection with the source of infection, suspicion points strongly to fish as the intermediate host, though the life history of the parasite has not yet been established. In treatment, male fern alone has thus far been used, but in neither case was the head found. At present nothing indicates that the treat- ment for this tapeworm should necessarily differ from treatment for Taenia. A LARVAL CESTODE (SPARGANUM MANSONI) OF MAN WHICH MAY POSSIBLY OCCUR IN RETURNING AMERICAN TROOPS! By Ch. Wardell Stiles, Ph. D., Pathologist of Bureau of Animal Industry, AND Louise Tayler, M. S., Assistant, Bureau of Animal Industry. [Figures 29-30.] In a former paper we have called attention to an adult Asiatic ces- tode (tapeworm) which might, perhaps, be introduced into this country by the returning troops. In the present article attention is directed to a larval cestode which is reported for man in Asia, but which is as yet unknown for America. This, also, is one of the parasites which may be found in American troops who have served in the East. The exact systematic position of the worm in question is at present somewhat uncertain. Cobbold originally placed it in the genus Ligula; Leuckart transferred it to Bothriocephahis; Ariola has recently called it Dihothrium, which is a synonym of Bothriocepliakis. 'An adult cestode {Diplogonoporus (jrandis) of man in Asia, which may possibly occur in returning American troops. (See above, pp. 43-47.)