Received: 09 May 2017
Received in revised form: 30 August 2017
Accepted: 14 September 2017
Available Online First: 23 November 2017
Published on: 15 March 2018
Correspondence: Nicola Costanzo, costanzo.nic@unicz.it
Abstract
Tuna is a food widely consumed fresh and canned as well. After catching and filleting, a pre-cooking step is normally followed by freezing and shipping to canning industry as loins. The aim of this paper was to assess the microbiological quality and safety of tuna loins (50 samples) imported by an Italian canned tuna producer from two different FAO fishing areas. Total bacterial count (TBC), Coliforms, Enterobacteriaceae, Escherichia coli, Listeria monocytogenes, Salmonella, Staphylococcus aureus, Vibrio parahaemolyticus, Vibrio cholera, pH measurement, S. aureus enterotoxin and histamine levels were evaluated. Significant differences were evidenced for TBC, Enterobacteriaceae, E. coli, Coliforms and pH between fishing areas. Staphylococcus aureus was detected in all the samples tested at 1 to 3 Log cfu/g; Staphylococcus warneri, S. saprophyticus, S. epidermidis, S. hominis, S. intermedius, S. vitulinus and S. sciuri were also identified. Listeria monocytogenes, Salmonella, Vibrio parahaemolyticus, Vibrio cholera and Staphylococcus aureus enterotoxin were not detected. Histamine ranged between 0 to 5 mg/kg. The tuna loins analysed in this paper have to be considered safe; staphylococci presence represents a possible concern and has to been taken in account when risk analysis is carried out.
Keywords: tuna loins, Katsuwonus pelamis, canned tuna, Staphylococcus aureus, histamine
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Copyright
© 2017 Casalinuovo F. This is an open-access article published under the terms of the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Acknowledgement
Special thanks to Dr Elonora Sarno for all advices and support.
Conflict of Interest Statement
The authors declared that they have no potential conflict of interest with respect to the authorship and/or publication of this article.
Citation Information
Macedonian Veterinary Review. Volume 41, Issue 1, Pages 33-37, p-ISSN 1409-7621, e-ISSN 1857-7415, DOI: 10.1515/macvetrev-2017-0028, 2018
10.1515/macvetrev-2017-0028
