PathWays Case Study: Oct. 4

A sputum was collected from a 60-year-old male with chronic obstructive pulmonary disease (COPD). He complained of increased cough productive of sputum over the past week and increased shortness of breath over baseline. Sputum was obtained during a coughing episode, and the Gram stain is shown below.


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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




Audrey Schuetz, M.D.
Consultant, Clinical Microbiology
Mayo Clinic


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.


Excellent case and overview of the most cogent points of M. catarrhalis

this is an excellent bit of work on moraxella for clinicians. well done!

Thanks for discussing the technical considerations with the gram stain.

It looks like a dimorphic fungus with buds and filaments

Very informative.

Thank you for showing Moraxella Catarrhalis and its treatment.

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