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Title: A comprehensive look into the volatile exometabolome of enteroxic and non-enterotoxic Staphylococcus aureus strains
Author: Baptista, Inês
Santos, Magda
Rudnitskaya, Alisa
Saraiva, Jorge A.
Almeida, Adelaide
Rocha, Sílvia M.
Keywords: Staphylococcus aureus
Saphylococcal enterotoxin
Staphylococcal food poisoning
Microbial metabolomics
Volatile metabolites
Issue Date: Mar-2019
Publisher: Elsevier
Abstract: Staphylococcal food poisoning is a disease that originates significant health and economic losses and is caused by Staphylococcus aureus strains able to produce enterotoxins. The aim of this work is to go further on the study of the volatile exometabolome of S. aureus using an advanced gas chromatographic technique. Enterotoxic and non-enterotoxic strains were assessed. The volatile exometabolome profile comprised 240 volatiles belonging to ten chemical families. This volatiles were mainly by-products of branched-chain amino acids and methionine degradation, pyruvate metabolism, diacetyl pathway, oxidative stress and carotenoid cleavage. Metabolites released by the first two pathways were produced in higher contents by the enterotoxic strains. This study add further insights to S. aureus volatile exometabolome, and also shows that by applying it, it is possible to distinguish strains of S. aureus by the number of produced enterotoxins, which is especially important from the food safety point of view.
Peer review: yes
DOI: 10.1016/j.biocel.2019.01.007
ISSN: 1357-2725
Appears in Collections:CESAM - Artigos
DBio - Artigos
DQ - Artigos
QOPNA - Artigos

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