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Volume 29, Number 5—May 2023
Dispatch

Severe Streptococcus equi Subspecies zooepidemicus Outbreak from Unpasteurized Dairy Product Consumption, Italy

Serena Bosica, Alexandra ChiaveriniComments to Author , Maria Elisabetta De Angelis, Antonio Petrini, Daniela Averaimo, Michele Martino, Marco Rulli, Maria Antonietta Saletti, Maria Chiara Cantelmi, Franco Ruggeri, Fabrizio Lodi, Paolo Calistri, Francesca Cito, Cesare Cammà, Marco Di Domenico, Antonio Rinaldi, Paolo Fazii, Fabrizio Cedrone, Giuseppe Di Martino, Patrizia Accorsi, Daniela Morelli, Nicola De Luca, Francesco Pomilio, Giustino Parruti, and Giovanni Savini
Author affiliations: Istituto Zooprofilattico Sperimentale Abruzzo e Molise “G. Caporale,” Teramo, Italy (S. Bosica, A. Chiaverini, M.E. De Angelis, A. Petrini, D. Aberaimo, M. Martino, M. Rulli, M.A. Saletti, M.C. Cantemi, P. Calistri, F. Cito, C. Cammà, M. Di Domenico, A. Rinaldi, D. Morelli, F. Pomilio, G. Savini); University of Teramo, Teramo (M.C. Cantelmi, F. Cito); Azienda USL di Pescara, Pescara, Italy (F. Ruggeri, F. Lodi, G. Di Martino, P. Accorsi, N. De Luca); Presidio Ospedaliero “Santo Spirito,” Pescara (P. Fazii, F. Cedrone, G. Parruti)

Main Article

Figure 2

Phylogenetic analysis of Streptococcus equi subspecies zooepidemicus strains in study of severe outbreak from unpasteurized dairy product consumption, Italy. We performed whole-genome sequencing and single-nucleotide polymorphism analysis of 40 S. equi subsp. zooepidemicus strains isolated from clinical and dairy food samples (Table 2). Tree was generated by using the neighbor-joining method. Different colors indicate the different types of samples. Strains were isolated from 2 samples each taken from bulk tank raw milk and cured raw milk cheese. Tree shows clinical specimen sequences clustered with those from dairy products. Scale bar indicates nucleotide substitutions per site.

Figure 2. Phylogenetic analysis of Streptococcus equi subspecies zooepidemicus strains in study of severe outbreak from unpasteurized dairy product consumption, Italy. We performed whole-genome sequencing and single-nucleotide polymorphism analysis of 40 S. equi subsp. zooepidemicus strains isolated from clinical and dairy food samples ([[ANCHOR###T2###Table 2###Anchor]]). Tree was generated by using the neighbor-joining method. Different colors indicate the different types of samples. Strains were isolated from 2 samples each taken from bulk tank raw milk and cured raw milk cheese. Tree shows clinical specimen sequences clustered with those from dairy products. Scale bar indicates nucleotide substitutions per site.

Main Article

Page created: March 15, 2023
Page updated: April 19, 2023
Page reviewed: April 19, 2023
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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