Caister Academic Press

How to write H. pylori

Helicobacter pylori: Molecular Genetics and Cellular Biology
Edited by: Yoshio Yamaoka
Distills the most important cutting-edge findings to produce a timely and comprehensive review of the field. A useful introduction to the subject for new researchers and an invaluable reference for the experienced microbiologist.

The CORRECT way to write H. pylori is:

                 H. pylori

Note the following:

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

INCORRECT ways to write H. pylori are:

  • H. pylori (incorrect because it is not in italics)
  • H.pylori (incorrect because there is no space after the dot)
  • H. Pylori (incorrect because of uppercase "P")
  • H. PYLORI (incorrect because of uppercase "PYLORI")
  • h. pylori (incorrect because of lowercase "h")
  • H.-pylori (incorrect because hyphen used instead of a space)

Please note in particular:

  • Always use italics to write H. pylori
  • Always use a single space after the dot (i.e. before "pylori") in H. pylori
  • Always use an uppercase "H" in H. pylori
  • Always use lowercase "pylori" in H. pylori
  • Never use an uppercase "P" in H. pylori, not even in headlines or headings
  • Never use uppercase PYLORI in H. pylori, not even in headlines or headings
  • Never use a hyphen in H. pylori

To be absolutely correct:

  • Write Helicobacter pylori 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: H. pylori

Further reading