D test for antibiotic sensitivity

Procedure: - Methicillin-resistant Staphylococcus aureus (MRSA) strain is cultured with erythromycin & clindamycin. - It is positive when the MRSA is resistant to erythromycin & resistance to clindamycin is inducible. - In this case, the bacterial growth pattern around the clindamycin looks like a 'D'.

References

Prescriber's Letter 12(7): 2005 Trimethoprim-Sulfamethoxazole (TMP-SMX) for Community-Acquired Methicillin-Resistant Staphylococcus aureus Detail-Document#: 210710 (subscription needed) http://www.prescribersletter.com