Mycology: Yeasts and Dimorphic Pathogens (by LabCE)

2 P.A.C.E. contact hour(s)

(based on 403 customer ratings)

Authors: Elmer W. Koneman, MD
Margaret Reinhart MS, MT(ASCP)
Reviewer: Julie Ann West PhD, MLS (ASCP), SM(ASCP)

Course provided by LabCE.

Mycology: Yeasts and Dimorphic Pathogens uses an interrogative, question-and-answer, approach to direct and instruct the participant in identifying yeasts and dimorphic fungi. Numerous images enhance the descriptions of identifying characteristics by illustrating the appearance of fungal colonies on media and microscopic appearance. The course also identifies sources of infection and associated diseases. This course is appropriate for laboratory professionals and students in clinical laboratory science programs who want to increase their understanding of mycology including microscopic and colony appearance and isolate identification.

See more courses in: Microbiology

Continuing Education Credits

P.A.C.E.® Contact Hours (acceptable for AMT, ASCP, and state recertification): 2 hour(s)
Course number 578-033-22, approved through 4/30/2024
Florida Board of Clinical Laboratory Personnel Credit Hours - General (Microbiology/Mycology/Parasitology): 2 hour(s)
Course number 20-909602, approved through 9/1/2022

Objectives

  • Define terms that are used to describe morphologic features of molds.
  • Describe preliminary identification methods for various yeasts.
  • Identify yeast species by observing the appearance of the colony morphology and through microscopic appearance.
  • Interpret various yeast patterns of growth on cornmeal agar.
  • Discuss various diseases that are associated with yeasts.
  • Define "dimorphic fungi" and identify dimorphic pathogens.
  • Describe microscopic and colony morphologies that aid in the identification of dimorphic pathogens.
  • Identify sources and diseases that are associated with dimorphic pathogens.
  • Recognize saprophytic molds that can mimic morphologic features of dimorphic pathogens and describe methods to inhibit the growth of these saprophytic counterparts.

Customer Ratings

(based on 403 customer ratings)

Course Outline

  • General Information Related to Identification of Molds
      • Introduction to the Identification of Molds
      • Terminology Related to Morphologic Features of Molds
  • Morphologic Features of Yeast
      • Preliminary Identification Methods for Various Yeasts
      • Morphologic Features of Yeast Colonies
      • Microscopic Morphologic Features of Yeast
      • Malassezia
  • Yeast Identification Using Cornmeal Agar
      • Interpretation of Growth Patterns on Cornmeal Agar
      • Examples of Cornmeal Agar Morphologies
  • Extending the Preliminary Identification to Full Identification
      • Evaluating the Need for Full Identification of Yeast
      • Recommended Procedure for Identification of Cryptococcus neoformans
  • Dimorphic Pathogens
      • What are Dimorphic Fungi
      • Microscopic Morphologic Features of the Mold Forms of Various Dimorphic Fungi
      • Microscopic Morphologic Features of the Yeast Forms of Various Dimorphic Fungi
      • Culture Confirmation Methods
      • Histoplasma capsulatum
      • Coccidioides immitis
      • Sporothrix schenckii
      • Blastomyces dermatitidis
      • Paracoccidioides brasiliensis
  • Differentiating Dimorphic Molds from Saprophytic Counterparts
      • Differentiating Dimorphic Fungi from Saprophytic Molds
      • Inhibiting the Growth of Saprophytic Molds
  • References
      • References

Additional Information

Level of instruction: Intermediate
 
Target audience: Microbiologists, medical laboratory scientists, medical laboratory technicians, and MLS students.
Author information: Elmer W. Koneman, MD, received his graduate degree from the University of Colorado School of Medicine in Denver, Colorado, and until his recent passing, was a Professor Emeritus at their Department of Pathology. He was the author of numerous journal articles and books, including Color Atlas and Textbook of Diagnostic Microbiology, 7th Edition, 2017. 
Author information: Margaret Reinhart MS, MT(ASCP) is the MLS Program Director and Senior lecturer in Biological Sciences at the University of the Sciences in Philadelphia PA where she teaches hematology, clinical immunology, parasitology, and other related courses. She is also an adjunct instructor in Hematology at Pennsylvania Hospital, Philadelphia PA. She holds a Masters Degree in Biology and in Health Care Administration.
Reviewer information: Dr. Julie Ann West is certified by the American Society for Clinical Pathology (ASCP) as a Medical Laboratory Scientist (MLS) and as a Specialist in Microbiology (SM). In addition, Dr. West has earned a PhD in Public Health - Infectious Disease Epidemiology and is Certified in Public Health (CPH) by the National Board of Public Health Examiners. Dr. West is experienced as a Technical Specialist, Safety Officer, Educator, and Lead in the Veterans Administration Healthcare System, and has prior experience as an Administrative Laboratory Director.
 
Content information: This course describes and identifies medically important yeast and dimorphic pathogens. Many photomicrographs are used to assist with the recognition of organisms in culture and microscopically.

Keywords

These are the most common topics and keywords covered in Mycology: Yeasts and Dimorphic Pathogens (by LabCE):

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Course provided by LabCE.
Candida parapsilosis, cornmeal agar mount.  Characteristic is the production of several spider-like colonies, composed of delicate pseudohyphae, produced along the margins of the streak.


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