Laboratory Fee Schedule
Procedure Number: MAA0023A
Synonym(s): |
Diphtheria screen, toxin, lymph nodes |
Requisition Form |
G-2B. |
Test Description |
Isolation of Corynebacterium diphtheriae from clinical specimens with reflex to identification and toxin testing (CDC reference testing). |
Pre-Approval Needed |
N/A |
Supplemental Information Required |
N/A |
Supplemental Form(s) |
N/A |
Performed on Specimens from (sources)
|
Human |
Sample/Specimen Type for Testing |
Throat, nasal, or wound swab. |
Minimum Volume/Size Required |
Single swab. |
Storage/Preservation Prior to Shipping |
- Collect specimen from patient and immediately place swab in Amies, Stuart’s or Loeffler’s transport media.
- If membranes are present and can be removed, swab from beneath the membrane.
- Store refrigerated at 2–8°C until shipment.
- Ship within 24–48 hours of collection.
|
Transport Medium |
Amies, Stuart’s or Loeffler’s transport medium.
|
Specimen Labeling |
- At least two patient identifiers 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 refrigerated at 2–8°C on cold packs for overnight delivery to Laboratory.
- 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-contained 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 shipping guidelines online here
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Method |
Culture |
Turn-around Time |
3–5 days. |
Interferences/Limitations |
Specimen should be taken from patient prior to antimicrobial therapy.
|
Common Causes for Rejection |
- Incorrect specimen collection or submission methods
- Mismatch(es) between patient identifiers on G-2B submission form and specimen label.
- Insufficient specimen growth
- Incorrect storage conditions
- Expired reagents/media/collection container
- Discrepancies between G-2B submission form and specimen label
- Missing/incomplete/illegible submission form
- Specimens not representative of the anatomic site from which C. diphtheriae is commonly found.
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Additional Information |
- If C. diphtheria is isolated and identified, it will be submitted to CDC for toxin testing.
- If no C. diphtheria is isolated, the clinical specimens are also routinely screened for Streptococcus pyogenes.
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