Biochemicals and Gram Negative Organism ID

This course is part of the Basic Microbiology eLearning Curriculum.


This eLearning course familiarizes laboratory professionals with how to read a Gram stain, colonial characteristics, and biochemical tests used to identify Gram negative microorganisms as well as commonly used testing algorithms. The course only covers aerobic microorganisms, those that grow in the presence of oxygen.


At the conclusion of this eLearning, you will be able to:

  • Identify different types of bacterial morphology seen on a Gram stain
  • Identify different types of colonial characteristics
  • Use flowcharts and identification charts to identify some common aerobic Gram negative microorganisms
  • Associate various biochemical tests with their correct applications
  • Interpret the results of biochemical methods
Continuing Education Units (CEU)

The Centers for Disease Control and Prevention, Division of Laboratory Systems, Laboratory Training and Services Branch, is approved as a provider of continuing education programs in the clinical laboratory sciences by the ASCLS P.A.C.E.® Program. This course is approved for 1.0 contact hour of P.A.C.E. ® credit.

P.A.C.E.® Course Number: 288‐021‐18

This course has been approved for 1.0 contact hours in the category of Microbiology/Mycology/Parasitology for Florida Laboratory Licensees.

Florida Course Number:  20‐446817

More Information

Biochemicals and Gram Negative Organism ID pdf icon[PDF – 276 KB]

clock icon

Length of Course

1 Hour

book icon

Credits Offered


presentation icon

Delivery Method


people icon

Sponsoring Agency


Page last reviewed: October 27, 2017