In pairs (diplobacillus). Figure 2-5 G.
In chains (streptobacillus). Figure 2-5H.
In palisades (palisade). Figure 2-5I.
(1) Spirillum (plural, Spirilla)--spiral, corkscrew-shaped organisms whose
long axes remain rigid while in motion.
(2) Spixochete--a spiral microorganism whose long axis flexes when it is in
motion. Figure 2-5 J.
d. Other Variations of Shapes.
(1) Coccobacillus. A short, plump bacillus with rounded ends resembling a
coccus in shape and arrangement.
Vibrio. A curved bacillus.
STRUCTURE OF BACTERIA
The typical structure of a bacterial cell is shown in figure 2-6. It consists of the
following general structures, found in all bacterial cells; and special structures, found in
specific types of bacterial cells:
Bacterial cell structure.
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