. Pathogenic micro-organisms, including bacteria and Protozoa; a practical manual for students, physicians and health officers. Medium-sized spirilla. Very large spirilla. spirilla, like the bacilli, divide only in one direction. A single cell,a pair, or the union of two or more elements may thus present theappearance of a short segment of a spiral or a comma-shaped form,an S-shaped form, or a complete spiral or corkscrew-like form ( and 7). The Higher Forms of Bacteria (see end of Section II).—A groupof organisms intermediate between bacteria and the moulds have been 12 PATHOGENIC MICRO
. Pathogenic micro-organisms, including bacteria and Protozoa; a practical manual for students, physicians and health officers. Medium-sized spirilla. Very large spirilla. spirilla, like the bacilli, divide only in one direction. A single cell,a pair, or the union of two or more elements may thus present theappearance of a short segment of a spiral or a comma-shaped form,an S-shaped form, or a complete spiral or corkscrew-like form ( and 7). The Higher Forms of Bacteria (see end of Section II).—A groupof organisms intermediate between bacteria and the moulds have been 12 PATHOGENIC MICRO-ORGANISMS. calletl hiirher bacteria. Thev show increased complexity of structureand function (1) in forming irregularly segmented filaments composed ofelements similar to those found in the lower forms and showing eithertrue or false Ijranching, (2) in developing certain portions of theirsubstance into reproductive i)odies from which the new individualsgrow. The filaments seen sometimes among the lower forms have inde-pendent segments, which may easily separate and grow as tiny un-cellular forms, while in the higher fo
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