D. De Mouy et al., Antibiotic susceptibility and mechanisms of erythromycin resistance in clinical isolates of Streptococcus agalactiae: French multicenter study, ANTIM AG CH, 45(8), 2001, pp. 2400-2402
Among 126 Streptococcus agalactiae isolates collected in 10 French laborato
ries in 1999, 27 (21.4%) had macrolide resistance related to the presence o
f erm(B) (11 strains), erm(A) subclass elm(TR) (10 strains), and mef(A) gen
es (2 strains) and the presence of combinations of erm(B) and erm(A) genes
or mef(A) genes (3 strains).