Antimicrobial Susceptibility Testing

Antimicrobial susceptibility testing of Gram negative organisms.

• Pneumonia
• Meningitis
• Bacteraemia
• Urinary tract infection
• Wound

Pure culture.

N/A

Send cultures as growth on culture medium or in transport medium. Culture vessel should be leak-proof or sealed appropriately.

Shipping of specimens shall be done by a TDG certified individual in accordance with TDG regulations. For additional information regarding classification of specimens for the purposes of shipping, consult either Part 2 Appendix 3 of the TDG Regulations or section 3.6.2 of the IATA Dangerous Goods Regulations as applicable.

N/A

Completed Antimicrobial Resistance and Nosocomial Infections Requisition.

Gram negative organisms may include but are not limited to most Enterobacterales, Acinetobacter sp., Pseudomonas sp., and Stenotrophomonas sp. Please consult with lab prior to submitting rarely tested organisms or those that require specialized growth conditions.

Susceptibility testing is performed at the discretion of the lab by Etest, disc diffusion, agar dilution, broth microdilution or Vitek2. Results are interpreted according to breakpoints published by CLSI, FDA or EuCAST.

8 calendar days.

1. CLSI. Performance Standards for Antimicrobial Susceptibility Testing, 33rd informational supplement, M100-S27. 2023. Wayne, PA: Clinical and Laboratory Standards Institute.
2. The European Committee on Antimicrobial Susceptibility Testing (EuCAST). Breakpoint tables for interpretation of MICs and zone diameters. Version 13, 2023. http//www.eucast.org

Canadian recommendations for laboratory interpretation of multiple or extensive drug resistance in clinical isolates of Enterobacteriaceae, Acinetobacter species and Pseudomonas aeruginosa