Anaerobic Bacteriology

Illustration of the Components of the E-test Method

June 2012

This is an illustration of the components of the E-test method.  There is available an automated mechanical dispenser for placing the strips on agar plates.  However, they can also be placed manually.  The MIC is read where the growth of bacteria and the inhibition of that growth intersects with the E-test strip.

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The Components of the E-test Method

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• Introduction
• Objectives
• Anaerobic Bacteria
• Principal Anaerobic Pathogens
• Specimen Selection: Avoid Contamination With Normal Flora
• Inappropriate Specimens
• Collection and Transport
• Anaerobic Transport Vials
• Anaerobic Transporters
• Anaerobic Culture Media
• Primary Culture CO₂ Holding Jar with Flow Meter
• Incubation
• Anaerobic Jars Set Up Using the Anaero-Pack
• Anaerobic Glove Box
• Anaerobe Culture Triage
• Anaerobe Culture Triage (cont.)
• Identification
• Colonial Morphology
• Pigmented Colonies
• Rapid Identification Using Gram Stain
• Identification
• 16S Ribosomal RNA Sequence of Bacteroides fragilis
• Antimicrobial Susceptibility Testing
• AST Methods
• Illustration of the Components of the E-test Method
• Susceptibility Testing by E-test
• Anaerobe Antimicrobial Panels
• References
• Special Thanks
• Questions