Cookies

Like most websites The Pathologist uses cookies. In order to deliver a personalized, responsive service and to improve the site, we remember and store information about how you use it. Learn more.
Subscribe to Newsletter
Subspecialties Microbiology and immunology, Training and education

Pneumocystis Mysteries

Credit: Yale Rosen.

Do you know the correct name of the fungus that causes Pneumocystis-related pneumonia? If you saw our recent #FridayPathPoll, you may! If not, try your hand below. Is it:

a. Pneumocystis carini
b. Pneumocystis carinii
c. Pneumocystis jiroveci
d. Pneumocystis jirovecii


If you answered Pneumocystis jirovecii, you are correct (1)! And, if you didn’t, you’re not alone. Check out the results from our poll:

Why the uncertainty? In 2002, the fungus formerly known as P. carinii underwent a name change (2) – but doubt persisted. Should it be P. jiroveci or P. jirovecii? To answer the question, we asked bacterial nomenclature expert Aharon Oren. His answer:

“It is ‘jirovecii.’ Bacteriologists (Appendix 9 of the ICNP) and botanists (Recommendation 60c of the ICN) tend to name organisms differently from zoologists (3). A zoologist would say, ‘The name is Jirovec and we add -i for the genitive.’ Bacteriologists and botanists first latinize Jirovec to Jirovecius, then make the genitive ‘jirovecii.’”

Credit: Yale Rosen.

Intrigued? Read more about Aharon Oren’s work here

Webinar

Sponsored by Ultivue

Intratumoral plasma cells predict outcomes to PD-L1 blockade in non-small cell lung cancer

Register for our webinar, hosted by The Pathologist and Ultivue and featuring expert speaker Jennifer Giltnane, Principal Pathologist-Scientist at Genentech. By joining this webinar, you will discover whether intratumoral B cells are beneficial in the context of PD-(L)1 blockade or are a general marker of a better prognosis in metastatic NSCLC.

Register today

Receive content, products, events as well as relevant industry updates from The Pathologist and its sponsors.
Stay up to date with our other newsletters and sponsors information, tailored specifically to the fields you are interested in

When you click “Subscribe” we will email you a link, which you must click to verify the email address above and activate your subscription. If you do not receive this email, please contact us at [email protected].
If you wish to unsubscribe, you can update your preferences at any point.

  1. Catalogue of Life, “Pneumocystis jirovecii Frenkel” (2020). Available at: https://bit.ly/3rcvyVQ.
  2. JR Stringer et al., “A new name for Pneumocystis from humans and new perspectives on the host-pathogen relationship,” Emerg Infect Dis, 8, 891 (2002). PMID: 12194762.
  3. HG Trüper, “How to name a prokaryote?: Etymological considerations, proposals and practical advice in prokaryote nomenclature,” FEMS Microbiol Rev, 23, 231 (1999).
About the Author
Michael Schubert

While obtaining degrees in biology from the University of Alberta and biochemistry from Penn State College of Medicine, I worked as a freelance science and medical writer. I was able to hone my skills in research, presentation and scientific writing by assembling grants and journal articles, speaking at international conferences, and consulting on topics ranging from medical education to comic book science. As much as I’ve enjoyed designing new bacteria and plausible superheroes, though, I’m more pleased than ever to be at Texere, using my writing and editing skills to create great content for a professional audience.

Register to The Pathologist

Register to access our FREE online portfolio, request the magazine in print and manage your preferences.

You will benefit from:
  • Unlimited access to ALL articles
  • News, interviews & opinions from leading industry experts
  • Receive print (and PDF) copies of The Pathologist magazine

Register