Clindamycin Resistance Test, (D Test)

Test Code

15126

CPT Codes
87184

Preferred Specimen

Pure isolate

Minimum Volume

One agar slant

Instructions

Staphylococcus, beta-streptococcus and streptococcus pneumoniae resistant to erythromycin and susceptible to clindamycin. Stability of isolates will be determined by the laboratory. Organism must be viable.

Transport Container

Agar slant in a double-walled container

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: Unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Mixed cultures

Methodology
Disk Diffusion

Setup Schedule

Daily

Report Available

2 days

Clinical Significance

Some isolates of Staphylococcus species Streptococcus Pneumoniae and beta-hemolytic Streptococci have been shown to have inducible resistance to clindamycin. Treatment of a patient with clindamycin for an organism that has inducible clindamycin resistance (D Test positive) may result in treatment failure.

Performing Laboratory

Quest Diagnostics-Seattle

1737 Airport Way S Suite 200

Seattle, WA 98134-1636

Last Updated: November 6, 2024

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.