Article Abstract:
The attachment of pathogenic Listeria monocytogenes cells to hydrophobic and hydrophilic surfaces coated with bovine serum albumin (BSA) and beta-lactoglobulin (beta-Lg) was studied. Maximum attachment was seen on bare hydrophobic surfaces and films formed by adsorption of beta-Lg and then BSA favored attachment more than films formed by adsorption of BSA and then beta-Lg. On the other hand, hydrophilic surfaces inhibited attachment of the bacterial cells.
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Article Abstract:
A study was conducted on the influence of ionophores such as nisin in Listeria monocytogenes serotype 4b strain acid tolerance. Survivability was determined by subjecting the strain to an acidic pH at 37-degrees centigrade. Results reveal that Escherichia coli O157:H7 and Shigella flexneri strains have higher acid tolerances than Listeria monocytogenes. Results indicate that nisin may be employed to regulate Listeria monocytogenes acid tolerance.
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Article Abstract:
Experimental studies indicate that nisin films formed on silanized silica surfaces suppress the growth of Listeria monocytogenes. Colonization of L. monocytogenes is absent on surfaces with high level of nisin and these surfaces facilitate cellular degradation. Inhibition is negligible in surfaces with low level of nisin. Adsorbed resin can be used as a food grade antimicrobial agent on food contact surfaces.
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