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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

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Table 2

Frequency of clarithromycin failure, by susceptibility profile

Patients treated (no.) Treatment failed (%) p value
Erythromycin-susceptible 25 3 (12)
Erythromycin-resistant 19 7 (36.8) 0.07a
- CRb 6 6 (100) 0.0001a
- other phenotypes 13 1 (7.6) 1.0a; 0.0002c
Total 44 10 (22.7)

aFor comparison of percentage of failure with erythromycin-susceptible.
bCR = Constitutive-type resistance.
cFor comparison of percentage of failure between CR and other phenotypes of resistance.

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