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How to write E. coli

The CORRECT way to write E. coli is:

                 E. coli

Note the following:

  • The uppercase "E" and the lowercase "coli" in E. coli
  • The dot (period, full stop) after the "E" in E. coli
  • The single space after the dot in E. coli
  • E. coli should be in italics

INCORRECT ways to write E. coli are:

  • E. coli (incorrect because it is not in italics)
  • E.coli (incorrect because there is no space after the dot)
  • E. Coli (incorrect because of uppercase "C")
  • E. COLI (incorrect because of uppercase "COLI")
  • e. coli (incorrect because of lowercase "e")
  • E.-coli (incorrect because hyphen used instead of a space)

Please note in particular:

  • Always use italics to write E. coli
  • Always use a single space after the dot (i.e. before "coli") in E. coli
  • Always use an uppercase "E" in E. coli
  • Always use lowercase "coli" in E. coli
  • Never use an uppercase "C" in E. coli, not even in headlines or headings
  • Never use uppercase COLI in E. coli, not even in headlines or headings
  • Never use a hyphen in E. coli

To be absolutely correct:

  • Write Escherichia coli the first time you refer to the microbe in your report, article, or story
  • Everywhere else in the same report, article, or story use the abbreviated form: E. coli