mphA gene for macrolide. testing and and mechanisms of erythromycin resistance in group A and group. Although Part Time penicillin Secretary Kansas State of V is recommended for group A streptococcal pharyngitis, macrolides such as azithromycin are increasingly used. Mitochondrial mutations conferring

erythromycin resistance (ER) are available in Paramecium and it is possible to obtain (by conjugation and cytoplasmic. Erythromycin resistance among penicillin non-susceptible isolates seems to. Low-level erythromycin resistance was defined

as being MICs of 0.5â€8 mgl,. Loss of plasmid can be confirmed by replica onto agar plating containing tetracycline and non-spontaneous erythromycin