New Sequence Types and Antimicrobial Drug–Resistant Strains of Streptococcus suis in Diseased Pigs, Italy, 2017–2019
Lucilla Cucco, Marta Paniccià, Francesca Romana Massacci, Alessandra Morelli, Massimo Ancora, Iolanda Mangone, Adriano Di Pasquale, Andrea Luppi, Denis Vio, Cesare Cammà, and Chiara Francesca Magistrali
Author affiliations: Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche ‘Togo Rosati,’ Perugia, Italy (L. Cucco, M. Paniccià, F.R. Massacci, A. Morelli, C.F. Magistrali); Istituto Zooprofilattico Sperimentale di Abruzzo e Molise ‘Giuseppe Caporale,’ Teramo, Italy (M. Ancora, I. Mangone, A. Di Pasquale, C. Cammà); Istituto Zooprofilattico Sperimentale della Lombardia e della Emilia-Romagna ‘Bruno Ubertini,’ Brescia, Italy (A. Luppi); Istituto Zooprofilattico Sperimentale delle Venezie, Padova, Italy (D. Vio)
Figure 1. Circular phylogenetic tree containing 78 Streptococcus suis isolates from diseased pigs, Italy, 2017–2019. The tree was inferred by using the iTOL interactive user interface (https://itol.embl.de). Shading over tip labels indicates sequence types. The serotypes of each isolate are also shown. The antimicrobial-resistant molecules are annotated by colors and shapes. Scale bar indicates substitutions per site. CLI, clindamycin; ENR, enrofloxacin; FFC, florfenicol; PEN, penicillin; ST, sequence type; TET, tetracycline; TMP/SXT, trimethoprim/sulfamethoxazole.
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