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Volume 6, Number 2—April 2000

Dispatch

Erythromycin Resistance in Streptococcus pyogenes in Italy

Matteo Bassetti*Comments to Author , Graziana Manno*, Andrea Collidà*, Alberto Ferrando*, Giorgio Gatti*, Elisabetta Ugolotti*, Mario Cruciani†, and Dante Bassetti*
Author affiliations: *University of Genoa, G. Gaslini Children's Hospital, Genoa, Italy; and †Department of Infectious Diseases, Verona, Italy

Main Article

Table 1

In vitro susceptibilitya of Streptococcus pyogenes from 180 pharyngitis patients

Erythromycin- Erythromycin-resistant
susceptible M-phenotype IRb CRc
Erythromycin 0.25 32 64 >128
Clarithromycin 0.5 16 64 >128
Azithromycin 0.25 16 64 >128
Clindamycin 0.5 1 1 >128
Rifampin 1 1 1 2
Chloramphenicol <#4 <#4 <#4 <#4
Ciprofloxacin 0.25 1 2 2

a MIC90 in µg/ml.
bIR = Inducible-type resistance.
cCR = Constitutive-type resistance.

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