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Persistent Listeria monocytogenes Isolates from a Poultry-Processing Facility Form More Biofilm but Do Not Have a Greater Resistance to Disinfectants than Sporadic Strains
Get PDF1).-Artículo Open Access. 2).-SUBJECTS (MATERIAS): 2a.-Tecnología de los Alimentos; 2b.-Medicina. Salud[EN]. Some strains of Listeria monocytogenes can persist in food-processing environments, increasing the likelihood of the contamination of foodstuffs. To identify traits that contribute to bacterial persistence, a selection of persistent and sporadic L. monocytogenes isolates from a poultry-processing facility was investigated for biofilm-forming ability (crystal violet assay). The susceptibility of sessile cells to treatments (five minutes) with sodium hypochlorite having 10% active chlorine (SHY: 10,000 ppm, 25,000 ppm, and 50,000 ppm) and benzalkonium chloride (BZK: 2500 ppm, 10,000 ppm, and 25,000 ppm) was also studied. All isolates exhibited biofilm formation on polystyrene. Persistent strains showed larger (p < 0.001) biofilm formation (OD580 = 0.301 ± 0.097) than sporadic strains (OD580 = 0.188 ± 0.082). A greater susceptibility to disinfectants was observed for biofilms of persistent strains than for those of sporadic strains. The application of SHY reduced biofilms only for persistent strains. BZK increased OD580 in persistent strains (2500 ppm) and in sporadic strains (all concentrations). These results indicate that the use of BZK at the concentrations tested could represent a public health risk. Findings in this work suggest a link between persistence and biofilm formation, but do not support a relationship between persistence and the resistance of sessile cells to disinfectants.SIFunding: The authors wish to express their thanks for the grants from the Ministerio de Ciencia, Innovación y Universidades (Spain, RTI2018-098267-R-C33) and from the Junta de Castilla y León (Consejería de Educación, Spain, LE164G18)
Reescrituras del gótico femenino en la literatura en español en el siglo XXI
No full textSerie: III JORNADAS FIGURACIONES DE LO INSÓLITO. MANIFESTACIONES DEL HORROR EN LAS NARRATIVAS ESPAÑOLA E H
La cuentística de Antonio Pereira en su contexto literario y sociocultural
No full textSerie: Congreso internacional Antonio Pereir
Presentación del libro: Una aventura literaria con Antonio Pereira
No full textClausura del Congreso
Serie: Congreso internacional Antonio Pereir
Presentación de las jornadas
No full textSerie: VI JORNADAS DE LA RED INTERNACIONAL DE UNIVERSIDADES LECTORAS SOBRE LITERATURA ACTUA
Jesús Torbado, la mirada de un escritor
No full textSerie: III Congreso de literatura actual en Castilla y León. Relato de viajes y novel
LIBRO 3. CUENTOS DE LA NATURALEZA, de José María Merino
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No full textSerie: Las puertas de lo posible. Narrativas de lo insólito y Estudios de lo insólit