Mycology: Yeasts and Dimorphic Pathogens (by LabCE)

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

(based on 651 customer ratings)

Author: Elmer W. Koneman, MD
Reviewer: Barbara Cebulski, MS, MLS(ASCP)CM

Course provided by LabCE.

See more courses in: Microbiology

Included In These Course Packages

Continuing Education Credits

P.A.C.E.® Contact Hours (acceptable for AMT, ASCP, and state recertification): 2 hour(s)
Course number 578-028-16, approved through 4/30/2018
Florida Board of Clinical Laboratory Personnel Credit Hours - General (Microbiology/Mycology/Parasitology): 2 hour(s)
Course number 20-547795, approved through 9/1/2018

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.

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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 at Denver, Colorado and is currently Professor Emeritus at their Department of Pathology. He is the author of numerous journal articles and books, including Color Atlas and Textbook of Diagnostic Microbiology, Fifth Edition, 1997(Lippincott) and is presently affiliated with Instructional Design Consultants, a consulting firm specializing in interactive training and distance learning for clinical microbiology.
Reviewer information: Barbara Cebulski, MS, MLS(ASCP)CM is a Program Director for MediaLab, Inc., located in Lawrenceville, GA. She has over 30 years experience in the medical laboratory profession as a technologist, section supervisor, and laboratory manager. She also was employed for nine years by the College of American Pathologists in the Laboratory Accreditation Program. Barbara holds a Masters in Instructional Technology from Georgia State University.
Content information: This course describes and identifies medically important yeast and dimorphic pathogens. Many photomicrographs are used to assist with 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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question Blastomyces


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