Tolerance response of multidrug-resistant Salmonella enterica strains to habituation to Origanum vulgare L. essential oil

Multidrug-resistant Salmonella enterica isolates from human outbreaks or from poultry origin were investigated for their ability to develop direct-tolerance or cross-tolerance to sodium chloride, potassium chloride, lactic acid, acetic acid, and ciprofloxacin after habituation in subinhibitory amoun...

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Published inFrontiers in microbiology Vol. 5; p. 721
Main Authors Monte, Daniel F M, Tavares, Adassa G, Albuquerque, Allan R, Sampaio, Fábio C, Oliveira, Tereza C R M, Franco, Octavio L, Souza, Evandro L, Magnani, Marciane
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 19.12.2014
Subjects
Ciprofloxacin
Microbiology
Multidrug-resistant
Oregano
Salmonella
tolerance
Salmonella
oregano
tolerance
ciprofloxacin
multidrug-resistant
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Summary:Multidrug-resistant Salmonella enterica isolates from human outbreaks or from poultry origin were investigated for their ability to develop direct-tolerance or cross-tolerance to sodium chloride, potassium chloride, lactic acid, acetic acid, and ciprofloxacin after habituation in subinhibitory amounts ( of the minimum inhibitory concentration - (MIC) and of the minimum inhibitory concentration - MIC) of Origanum vulgare L. essential oil (OVEO) at different time intervals. The habituation of S. enterica to OVEO did not induce direct-tolerance or cross-tolerance in the tested strains, as assessed by the modulation of MIC values. However, cells habituated to OVEO maintained or increased susceptibility to the tested antimicrobials agents, with up to fourfold double dilution decrease from previously determined MIC values. This study reports for the first time the non-inductive effect of OVEO on the acquisition of direct-tolerance or cross-tolerance in multidrug-resistant S. enterica strains to antimicrobial agents that are largely used in food preservation, as well as to CIP, the therapeutic drug of salmonellosis.
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Reviewed by: Atte Von Wright, University of Eastern Finland, Finland; Lei Dai, Iowa State University of Science and Technology, USA; Tzi Bun Ng, The Chinese University of Hong Kong, China; Alexandre José Macedo, Universidade Federal do Rio Grande do Sul, Brazil
This article was submitted to Antimicrobials, Resistance and Chemotherapy, a section of the journal Frontiers in Microbiology.
Edited by: Luis Cláudio Nascimento Da Silva, University of Copenhagen, Denmark
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2014.00721