The inspection of meats for animal parasites / prepared under the direction of D.E. Salmon.

Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: The inspection of meats for animal parasites / prepared under the direction of D.E. Salmon. Source: Wellcome Collection.

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    GENUS MONIEZIA. It is often quite difficult to distinguish between the differ- ent forms, as the specific characters must to a great extent be taken from the internal anatomy, and it is therefore necessary to make a microscopic examination of one or more specimens which have been artificially stained. In many cases, however, these characters maybe recognized if a fresh worm is allowed to macerate one or two days in water; then by pressing some of the segments between two pieces of glass and holding them to the light some of the internal anatomy can be recognized. 24. The White Moniezia (Moniezia alba) of Cattle and Sheep. Synonymy.—Taenia alba Perroncito, 1879; Moniezia alba (Perroncito) R. Blanchard, 1891; ( ?) M. alba var. dubia Moniez, 1891. This tapeworm has been recorded for France, Italy, and Algeria, but not as yet for this country. Poorly preserved specimens of M. planissima resemble this form in that the interproglottidal glands can not be seen distinctly. This renders it possible that M. alba is simply a poorly preserved M. planissima—a point which can not, however, be demon- strated by a comparison of the original types; on this ac- count, it is necessary to retain both species. 25. Vogt’s Moniezia (Moniezia Vogti) of Sheep. Synonymy.—Taenia. Vogti Moniez, 1879; Anoplocephala Vogti (Moniez) Moniez, 1891; Moniezia Vogti (Moniez) Stiles & Hassall, 1896. Very little is known about this supposed species, which may be a distinct form or may be a dwarfed specimen ot some other species. It has been found once in France and once in England, but is not yet recorded for America. 26. The Flat Moniezia {Monieziaplanissima) of Cattle and Sheep. r io. 116.—P o r 11 o n s of ai [Figs. 111-115.] Synonymy.—Moniezia planissima Stiles & Hassall, 1892; Taenia {Moniezia) planissima (Stiles & Hassall) Braun, 1895; T. expansa pro parte of various authors. This seems to be the most common adult tapeworm in American cattle; it als adult specimen of tin Broad Moniezia (Moniezit expansa), natural size (After Stiles & Hassall 1893, PI. VI, tig. 1.) specimens of Thysanosoma Giardi said to have been taken from .Russia, and Detmers (1879), and Stiles (1895, pp. 220-222) have recorded three cases of other forms alleged to have occurred in this country. The three genera of adult tapeworms for us to consider in connection with cattle, sheep, and swine are Moniezia, Thysanosoma, and Stilesia. For a technical discussion of those genera and their species, with bibliographies, see Stiles Sz Hassall (1893) and Stiles (1896). For convenience of discussion, all of the forms will be treated together. For anatomical characters, compare figs. 111-124 with the key, page 21. hogs in