Case of contamination by Listeria monocytogenes in mozzarella cheese


Submitted: 13 May 2013
Accepted: 10 September 2013
Published: 4 March 2014
Abstract Views: 2820
PDF: 1100
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Authors

  • Sara Greco 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.

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 Mar. 28];3(1). Available from: https://www.pagepressjournals.org/ijfs/article/view/ijfs.2014.1708

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