PathWays Case Study for May 31

A 72-year-old man presented with a productive cough of one week’s duration. The results of a sputum Gram stain are shown.


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Lori Duresko, MT(ASCP)

Lori Duresko, MT(ASCP)
Education Specialist II
Mayo Clinic
Instructor in Laboratory Medicine and Pathology,
Mayo Clinic College of Medicine



Dr. Bobbi Pritt

Bobbi Pritt, M.D.
Vice Chair of Education, Department of Laboratory Medicine
Consultant, Division of Clinical Microbiology
Mayo Clinic
Associate Professor of Laboratory Medicine and Pathology,
Mayo Clinic College of Medicine
Follow her on Twitter: @ParasiteGal


April Josselyn

April Josselyn is a Marketing Associate at Mayo Medical Laboratories. She is the editor of Mayo Clinic PathWays and supports corporate communications strategies and internal communications. She has worked at Mayo Clinic since 2012. Outside of work, April enjoys the outdoors and being "hockey mom" for her two sports-crazed boys.


The correct answer is Streptococcus pneumoniae

Gram Positive Encapsulated Diplococci.

Good case for all level of clinical/medical personal in clinical pathology.

Streptococcus pneumoniae

I just love love this site. Retired advanced degree health educator. I look forward to reading the study/example and recall the classes I had in MBiology years ago.This one I guessed correctly.
Thank you for your great work.

Streptococcus Pneumoniae

Enjoy this site

Thanks for the online “PT”-like challenge. I don’t see a whole lot of micro anymore and I appreciate the case–

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