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Morphology of bacteria

Morphology of bacteria. Bacteria can be distinguished from one another by their morphology: size, shape, arrangement, staining characteristics. Size. Most bacterial species are approximately 1 micrometer in diameter. Shape.

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Morphology of bacteria

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  1. Morphology of bacteria

  2. Bacteria can be distinguished from one another by their morphology: • size, • shape, • arrangement, • staining characteristics.

  3. Size • Most bacterial species are approximately 1 micrometer in diameter.

  4. Shape • Bacteria are difficult to differentiate by size, but they have different shapes: • spherical bacteria – cocci • rod-shaped bacteria – rods • a snakelike bacteria – spirillum

  5. Shapes of Bacteria • Coccus • Chain = Streptoccus • Cluster = Staphylococcus • Bacillus • Chain = Streptobacillus • Coccobacillus • Vibrio = curved • Spirillum • Spirochete

  6. Arrangement • Some bacteria form aggregates such as the grapelike clusters of Staphylococcus species or the diplococcus (two cells together) observed in Streptococcus or Neisseria species.

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