The Human Normal (Commensal) Flora

The Gram film from an oral swab

In the Gram film above two different types of cell can be seen; both are round. One is Gram-positive, the other Gram-negative. Thus, this film contains both Gram-positive and Gram-negative cocci. The Gram-positive cocci are said to resemble bunches of grapes: The Gram-negative cocci are generally arranged in pairs and are said to be 'diplococci':

Link to normal flora cases

Page edited April 2006

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