Investigation of a Staphylococcus aureus sequence type 72 food poisoning outbreak associated with food-handler contamination in Italy.
Staphylococcus aureus
Fourier transform infrared spectroscopy
food safety
foodborne outbreak
nasal swab
source tracking
Journal
Zoonoses and public health
ISSN: 1863-2378
Titre abrégé: Zoonoses Public Health
Pays: Germany
ID NLM: 101300786
Informations de publication
Date de publication:
08 2023
08 2023
Historique:
revised:
07
04
2023
received:
17
06
2022
accepted:
24
04
2023
medline:
4
7
2023
pubmed:
11
5
2023
entrez:
11
5
2023
Statut:
ppublish
Résumé
On August 2019 a staphylococcal food poisoning outbreak occurred in an elderly home in Piedmont, Italy. The epidemiological investigation performed among the persons that consumed the meal identified chicken salad as the most likely source of the outbreak. Staphylococcus aureus was isolated from a total of seven samples, namely one vomit sample from a guest of the nursing home, two food samples (chicken salad with and without mayonnaise) and nasal swabs collected from a total of four persons working in the kitchen of the nursing home. The maximum likelihood tree obtained using single nucleotide polymorphisms analysis revealed that the isolates from the aforementioned samples clustered together. Multilocus sequence typing revealed that they belonged to Sequence Type 72. Fourier transform infrared spectroscopy (FTIR) was used in parallel to single nucleotide polymorphisms and whole genome sequencing for the determination of the degree of relatedness of the isolates. The results of the FTIR showed the same clustering obtained with single nucleotide polymorphisms and whole genome sequencing and revealed the source of infection. This study underlines the importance of both laboratory evidence and epidemiological data for outbreak investigation and further confirms that FTIR is a suitable support for the short-term epidemiological investigation on source attribution in case of a S. aureus infection.
Substances chimiques
Enterotoxins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
411-419Informations de copyright
© 2023 The Authors. Zoonoses and Public Health published by Wiley-VCH GmbH.
Références
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