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Heat map showing pattern of Staphylococcus aureus isolates resistant (R) to at least 1 antibiotic, by arm. Resistance Etest cutoff values: azithromycin, ≥8 μg/mL; chloramphenicol, ≥32 μg/mL; erythromycin, ≥16 μg/mL; clindamycin, ≥4 μg/mL; cefoxitin for methicillin-resistant Staphylococcus aureus (MRSA), ≥8. Intermediate Etest cutoff values: azithromycin, 4 μg/mL; erythromycin, 1–4 μg/mL.
