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Applied and Environmental Microbiology, June 2009, p. 4224-4229, Vol. 75, No. 12
0099-2240/09/$08.00+0     doi:10.1128/AEM.01380-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Characterization of Tetracycline-Resistant Streptococcus thermophilus Isolates from Italian Soft Cheeses{triangledown}

Lucia Rizzotti,1 Federica La Gioia,1 Franco Dellaglio,1 and Sandra Torriani2*

Dipartimento di Biotecnologie,1 Dipartimento di Scienze, Tecnologie e Mercati della Vite e del Vino, Università degli Studi di Verona, Verona, Italy2

Received 19 June 2008/ Accepted 16 April 2009

Tetracycline-resistant Streptococcus thermophilus isolates from soft cheeses harbored the genes tet(S), tet(M), and tet(L). Molecular analysis of these genes revealed their expression, localization on plasmids or Tn916-Tn1545 family transposons, and their similarity with published sequences. The study highlights the importance of an accurate safety assessment of using S. thermophilus as a starter culture.

* Corresponding author. Mailing address: Dipartimento di Scienze, Tecnologie e Mercati della Vite e del Vino, Università degli Studi di Verona, Via della Pieve 70, 37029 San Floriano, Verona, Italy. Phone: 39-045-8027921. Fax: 39-045-8027051. E-mail: sandra.torriani{at}univr.it

{triangledown} Published ahead of print on 24 April 2009.

Applied and Environmental Microbiology, June 2009, p. 4224-4229, Vol. 75, No. 12
0099-2240/09/$08.00+0     doi:10.1128/AEM.01380-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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