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Bacillus (shape) facts for kids

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Bacillus species
A typical bacillus, Gram stained: click for enlarged view

A bacillus (plural bacilli) is a rod-shaped cylindrical bacteria. Bacilli are found in many different taxonomic groups of bacteria.

  • If it is not capitalized or italicized the name refers to any rod-shaped bacterium.

There is no connection between the shape of a bacterium and its colors in the gram staining. In other words, some of them are gram negative and some are gram positive.


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