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Streptococcus pneumoniae Serotyping

Laboratory Fee Schedule
Procedure Number: NA
 

Synonym(s): Pneumococcus, pneumococci, pneumococcal, respiratory, invasive, Minnesota ARLN
Requisition Form G-2B
Test Description
  • Serotype identification by whole genome sequencing (WGS).

  • Only isolates of invasive S.pneumoniae from children younger than 5 years old are reportable and accepted by DSHS Lab. 

  • Isolates submitted by DSHS Lab to Minnesota Dept. of Health AR Lab Network lab for serotyping. 

Test Description
Pre-Approval Needed

N/A

Supplemental Information Required

Please include vaccination history (if known) on back of submission form or attach report to form.

Performed on Specimens from (sources)

Human 

Sample/Specimen Type for Testing

Pure cultured S. pneumoniae isolates from blood and CSF specimens from children younger than 5 years old.

Minimum Volume/Size Required

At least one viable colony of pure isolate per plate/slant

Storage/Preservation Prior to Shipping

Store at ambient temperatures or refrigerated at 2–8°C until shipment.

Transport Medium

Any medium that supports growth of Streptococcus spp. (e.g., blood agar, chocolate agar)

Specimen Labeling
  • At least two patient identifiers are required on specimen (e.g., patient full name, date of birth, medical record number). 

  • Three patient identifiers are preferred. 

  • Patient identifiers on specimen label must exactly match identifiers on submission form. (e.g., abbreviated name on label and full name on form is not acceptable.)

  • Additional DSHS Laboratory specimen labeling guidelines available online here.

Shipping and Specimen Handling Requirements
  • Ship at room temperature or on cold packs. Ship with several cold packs during times of excessive temperatures.

  • Ship according to Dangerous Goods Regulations, IATA, and/or CFR 49.

  • Category B Biological Substance, UN3373 shipping requirements apply.

  • Handle as infectious agent using universal precautions. 

  • Triple-contain in accordance with federal shipping regulations. 

  • Submitters are responsible for packaging and shipping specimens according to regulatory requirements. 

  • Laboratory does not supply collection kits or shipping materials.

  • Additional DSHS Laboratory specimen labeling guidelines online here.

Method Whole Genome Sequencing (WGS)
Turn-around Time
  • 10–21 days 

  • Specimens are submitted to Minnesota Department of Health ARLN laboratory for testing. 

Interferences/Limitations

Specimen must be a viable pure isolate for testing.

Common Causes for Rejection
  • Isolates are obtained from patients more than 5 years old.  

  • Mismatch(es) between patient identifiers on G-2B submission form and specimen label. 

  • Non-viable isolates

  • Mixed culture/contamination

  • Incorrect storage conditions 

  • Expired media 

  • Missing/incomplete/illegible submission form

Additional Information
  • Invasive Streptococcus pneumoniae infection in children younger than 5 years old is a notifiable condition and isolates are REQUIRED to be submitted to the DSHS Laboratory per Texas Administrative Code (TAC) chapter 97. 

  • Mark the “IDEAS” box as the payor source on the G-2B form.