https://doi.org/10.4081/ijfs.2014.1708

Case of contamination by Listeria monocytogenes in mozzarella cheese

Vol. 3 No. 1 (2014)
Submitted: 13 May 2013
Accepted: 10 September 2013
Published: 4 March 2014
Listeria monocytogenes, Mozzarella, PFGE, Serotypes
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Authors

Sara Greco
sara.greco@izslt.it
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Rita Tolli
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Teresa Bossù
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Eda Maria Flores Rodas
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Fabiola Di Giamberardino
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Alessandro Di Sirio
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Silvia Vita
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Veronica De Angelis
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Stefano Bilei
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Michele Sonnessa
Dipartimento di Sanità Pubblica Veterinaria e Sicurezza Alimentare, Istituto Superiore di Sanità, Roma, Italy.
Antonietta Gattuso
Dipartimento di Sanità Pubblica Veterinaria e Sicurezza Alimentare, Istituto Superiore di Sanità, Roma, Italy.
Luigi Lanni
Direzione Operativa Controllo degli Alimenti, Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy.
Following a Listeria monocytogenes detection in a mozzarella cheese sampled at a dairy plant in Lazio Region, further investigations have been conducted both by the competent Authority and the food business operatordairy factory (as a part of dairy factory HACCP control). In total, 90 dairy products, 7 brine and 64 environmental samples have been tested. The prevalence of Listeria monocytogenes was 24.4% in mozzarella cheese, and 9.4% in environmental samples, while brines were all negatives. Forty-seven strains of L. monocytogenes have been isolated, all belonging to 4b/4e serotype. In 12 of these, the macrorestriction profile has been determined by means of pulsed field gel electrophoresis. The profiles obtained with AscI enzyme showed a 100% similarity while those obtained with ApaI a 96.78% similarity. These characteristics of the isolated strains jointly with the production process of mozzarella cheese has allowed to hypothesise an environmental contamination.

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How to Cite

1.
Greco S, Tolli R, Bossù T, Flores Rodas EM, Di Giamberardino F, Di Sirio A, Vita S, De Angelis V, Bilei S, Sonnessa M, Gattuso A, Lanni L. Case of contamination by Listeria monocytogenes in mozzarella cheese. Ital J Food Safety [Internet]. 2014 Mar. 4 [cited 2024 Nov. 27];3(1). Available from: https://www.pagepressjournals.org/ijfs/article/view/ijfs.2014.1708

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