Susceptibility of Listeria monocytogenes from traditional cheese-dairies to in-use sanitizers

Lourenço, António; Neves, Elsa; Brito, Luísa

doi:10.1016/j.foodcont.2008.08.009

Cited by 26 publications

(16 citation statements)

References 16 publications

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“…In a previous study with the same sanitizers used in this work, the results from susceptibility testing of L. monocytogenes strains suggested that except for agent BP (in the presence of organic matter), the other in‐use sanitizers were bactericidal for persistent and nonpersistent strains at in‐use concentrations (Lourenço and others 2009). In the present study with L. monocytogenes biofilms, in pure culture as in co‐culture with P. aeruginosa , isolates of the persistent strain were included in the group of good biofilm formers.…”

Section: Resultsmentioning

confidence: 63%

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Biofilms of Listeria monocytogenes Produced at 12 ° C either in Pure Culture or in Co‐Culture with Pseudomonas aeruginosa Showed Reduced Susceptibility to Sanitizers

Lourenço¹,

Machado²,

Brito³

2011

Journal of Food Science

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Since most food plants have cold wet growth niches in production and storage areas, susceptibility testing should be performed on biofilms produced at refrigeration temperatures. Moreover, the efficiency of the sanitizers used in food industries should be performed on mixed culture biofilms, since in field conditions these will predominate. The results presented here highlight the importance of the temperature used for biofilm formation, when susceptibility to disinfectants is being assessed, as biofilms produced at lower temperature were less susceptible to sanitizers.

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Section: Resultsmentioning

confidence: 63%

“…Previous work has shown that neither the resistance nor the adaptation of planktonic cells to the sanitizers seems to be the main reason for the existence of persistent L. monocytogenes strains in traditional cheese dairies (Lourenço and others 2009).…”

Section: Introductionmentioning

confidence: 99%

Biofilms of Listeria monocytogenes Produced at 12 ° C either in Pure Culture or in Co‐Culture with Pseudomonas aeruginosa Showed Reduced Susceptibility to Sanitizers

Lourenço¹,

Machado²,

Brito³

2011

Journal of Food Science

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“…Thus, although in several works it had been pointed out that persistent L. monocytogenes strains are QACs resistant (Aase et al, 2000;Mullapudi et al, 2008), others had not detected any relation (Earnshaw and Lawrence, 1998;Holah et al, 2002). Recently, Lourenço et al, 2009 have demonstrated there is no direct relation between persistence and resistance to disinfectants in L. monocytogenes isolated from cheese dairies. So, some of the ongoing research in applied microbiology is focused on the study of the physiological consequences of BAC and other biocides on bacterial resistance.…”

Section: Introductionmentioning

confidence: 99%

A new and efficient method to obtain benzalkonium chloride adapted cells of Listeria monocytogenes

Ibusquiza

Herrera

Vázquez‐Sánchez

et al. 2012

Journal of Microbiological Methods

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“…(Simoes et al 2010), can greatly affect the efficacy of disinfectant agents (Wirtanen & Salo 2003;Lourenco et al 2009). In such an organic load microorganisms can long persist, grow and consequently be released into food products (Schlegelová et al 2010).…”

Section: Resultsmentioning

confidence: 99%

Bacterial biofilms resist oxidising agents due to the presence of organic matter

Jaglič¹,

Cervinkova²,

Vlkova³

et al. 2012

Czech J. Food Sci.

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Jaglic Z., Červinková D., Vlková H., Michu E., Kunová G., Babák V. (2012): Bacterial biofilms resist oxidising agents due to the presence of organic matter. Czech J. Food Sci., 30: 178-187.This study evaluated the susceptibility of planktonic and biofilm cells of Staphylococcus spp. (n = 87), klebsiella spp. (n = 30), and escherichia coli (n = 74) isolates originating from food contact surfaces of milk and meat processing plants to benzalkonium chloride (BAC), sodium hypochlorite (NaClO), chloramine B (CAB), and peracetic acid (PAA). Bacterial growth and reduction of viable cells in the presence of disinfectants were determined in tryptone soya broth (TSB) and water, respectively. Biofilm positive isolates (n = 73) were tested for the presence of selected qac genes. Unlike BAC, chlorine-based disinfectants and PAA were poorly efficient in TSB, especially in the case of biofilms. However, when tested in water, the efficacy of NaClO, CAB and PAA substantially increased, which was particularly evident in biofilms. In water, staphylococcal biofilms were even more susceptible to CAB than planktonic cells. A part (23.3%) of the biofilm positive staphylococci carried the qac genes but did not express an increased resistance to BAC. This study showed that bacterial biofilms protected with organic matter could be one of the main reasons for disinfection failure.

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Susceptibility of Listeria monocytogenes from traditional cheese-dairies to in-use sanitizers

Cited by 26 publications

References 16 publications

Biofilms of Listeria monocytogenes Produced at 12 ° C either in Pure Culture or in Co‐Culture with Pseudomonas aeruginosa Showed Reduced Susceptibility to Sanitizers

Biofilms of Listeria monocytogenes Produced at 12 ° C either in Pure Culture or in Co‐Culture with Pseudomonas aeruginosa Showed Reduced Susceptibility to Sanitizers

A new and efficient method to obtain benzalkonium chloride adapted cells of Listeria monocytogenes

Bacterial biofilms resist oxidising agents due to the presence of organic matter

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