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Antimicrobial Susceptibility Testing

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Accredited by the Standards Council of Canada to Laboratory no. 594 (ISO/IEC 17025)

Requisition Forms

Reference Details


Antimicrobial Susceptibility Testing (AST) is done by the broth microdilution method as described by the Clinical and Laboratory Standards Institute (CLSI) guidelines (1).

Test Category:
Susceptibility Testing
Streptococcus pneumoniae
Illnesses and Diseases:
  • Bacteraemia
  • Pneumococcal meningitis

Pure culture isolated from a normally sterile site.

Collection Method:

Isolate provided on culture medium.

Specimen Processing, Storage and Shipping:

Send as growth on culture medium (preferred) or on a swab in transport medium.  Chocolate or charcoal media are recommended.  Cultures can be also shipped frozen on dry ice. 

Transportation of Dangerous Goods:

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.

For additional guidance on the transport of infectious substances in other languages, please click on the link below.


Patient Criteria:

Invasive disease due to Streptococcus pneumoniae.

Accompanying Documentation:

Completed Isolate Submission Requisition for Streptococcus form including contact and lab name, address and telephone number.  Patient age or date of birth, sex, culture reference number, clinical source, date collected and test requested. 



Methods and Interpretation of Results:

Based on CLSI Guidelines (1).

Turnaround Time:

30 calendar days*

Outbreak associated or urgent isolates will be granted priority status and completed as soon as possible.

*Turn around times may not be guaranteed when isolates are submitted in large batches.

Phone #: (204) 789-6063; STI: (204) 784-5995
Fax: (204) 789-2140
  1. CLSI. Performance Standards for Antimicrobial Susceptibility Testing. 31th ed. CLSI supplement M100. Wayne, PA: Clinical and Laboratory Standards Institute; 2021.
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