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Unformatted text preview: characteristic of a genus. 1. Cocci (us) a. Spherical, oval, egg shaped, bean shaped b. Size and shape varies. c. Singles, pairs, irregular clusters, tetrads, cubical packets of 8. 2. Bacilli (us) a. Elongated, cylindrical, rod-like b. Vary in diameter, length, shape of ends, arrangement. c. Singles, pairs, chains, parallel packets. 3. Spirals a. Curved rods b. Vary in diameter, length, number of curves, tightness of curves, flexibility. c. Three groups of spirals: 1. Vibrios - single curve, comma shaped 2. Spirillum - rigid , two or more curves, cork screw shape 3. Spirochetes - flexible , two or more curves, wavy - move by flexing bodies....
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- Fall '09