Bergey's manual of determinative bacteriology : a key for the identification of organisms of the class schizomycetes / arranged by a committee of the Society of American Bacteriologists.

  • Bergey, D. H. (David Hendricks), 1860-1937.
Date:
1923
Catalogue details

Licence: In copyright

Credit: Bergey's manual of determinative bacteriology : a key for the identification of organisms of the class schizomycetes / arranged by a committee of the Society of American Bacteriologists. Source: Wellcome Collection.

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    Genus III. Cristispira Gross Giant forms with undulating body and peculiar flattened ridge errone¬ ously called an ‘‘undulating membrane’’ which runs the length of the body. Parasitic in molluscs. The type species is Cristispira balbiani Certes. 1. Cristispira balbiani Certes. (Bull. Soc. Zool. de France, VII, 1882, 347.) Cylindrical: 1.0 to 1.5 by 40 to 90 microns, with obtuse ends. Spiral amplitude. Spiral depth. Waves 2 to 5, sometimes more, large irregular, shallow. Axial filament absent. Chambered structures present. Membrane distinct. Flexible, elastic. Crista present, a ridge-like membrane. Terminal finely spiral filament absent. Flagella absent. Highly motile end portion absent. Division, transverse. Stains: Cell membrane behaves like chitin or cutin substance. Stains violet by Giemsa’s solution, and light gray by iron-hemotoxylin. Trypsin digestion: Membrane resistant, crista and chambers disappear. Bile salt (10 per cent): Crista quickly dissolves. Saponin (10 per cent): Crista becomes fibrillar, then indistinct. Habitat: Parasitic in alimentary tract of shell-fish. 2. Cristipira anodontae Iveysselitz. (Arb. aus dem Ivaiserl. Gesund- heitsamte, XXIII, 1906, 566.) Large spirals* 3 to 4 by 75 to 130 microns with sharp or blunt ends; flattened and possessing an undulating membrane. The periplast is fibrillar in appearance and there is a dark granule at each end of the undulating membrane. The chromatin material is distributed in the form of globules or elongated bands. Habitat: Found in the crystalline style of fresh water mussels, Anodonta cygnea and A. mutabilis. 3. Cristispira interrogations Gross. (Mitteil. a. d. Zool. Station zu Naepel, XX, 1910, 41.) Spirals: 0.5 by 25 microns, with pointed ends. Habitat: Found in the intestinal canal of the mollusc Pecten jacobaeus. 4. Cristispira pinnae Gonder. (Centralblatt f. Bakteriologie, XLVII, 1908, 491.) Spirals: 0.5 to 3.0 by 10 to 60 microns, round in section with blunt ends, the one being slightly more pointed than the other.