BACTERICIDAL EFFICIENCIES OF COMMERCIAL DISINFECTANTS AGAINST LISTERIA MONOCYTOGENES ON SURFACES

Abstract

The efficiencies of potassium persulphate, isopropanol, hydrogen peroxide and peracetic acid, quaternary ammonium compound, hypochlorite, sodium dichloroisocyanurate, ethanol and phenol derivatives, tertiary alkylamines and dimethyl alamine betaine‐based disinfectants and a hypochlorite‐based disinfecting cleaning agent were evaluated against eight Listeria monocytogenes strains representing three different ribotypes. All the disinfectants were effective in a suspension test with an exposure time of 30 s at the lowest concentrations recommended by the manufacturer. The efficiencies on surfaces were reduced. However, on clean surfaces all the agents were considered effective when the exposure time was 5 min and the concentration was the average recommended by the manufacturer. Five of nine disinfectants and the disinfecting cleaning agent were considered effective in soiled conditions in the surface test. The most efficient agent was isopropanol‐based and the least effective was the disinfectant containing tertiary alkylamine and dimethyl alamine betaine. Differences in bactericidal efficiencies of disinfectants against different L. monocytogenes strains on meat soiled surfaces were found.

Preliminary Investigation on the Resistance of Some Environmental Bacteria in Yola Metropolis, Adamawa State, Nigeria, to Biocides and Antibiotics

“…At a very low concentration, the organisms were able to survive in the biocides. This was also observed in the study by Kaarina et al (24).…”

Developing application and detection methods for Listeria monocytogenes and fish extract on open surfaces in order to optimize cleaning protocols

“…In order to maintain hygienic standards in the food industry, regular cleaning of equipment must be undertaken. However, it has been shown that the susceptibility of cells to biocides may be reduced by the presence of organic material on the surface (Aarnisalo et al, 2000;Bagge-Ravn et al, 2003;Gram et al, 2007). Retained organic material on a surface may also impede the recovery of cells and methods of detection (Whitehead et al, 2009a).…”

Biofilms and hygiene on dairy farms and in the dairy industry: sanitation chemical products and their effectiveness on biofilms - a review

“…Aarnisalo et al (2000) reported such a situation using 8 strains of L. monocytogenes and testing the effectiveness of 10 disinfectants typical for the food industry. Le Chevallier et al (1988), Wirtanen and Juvonen (2002) and other authors compared the basic tests with the surface tests and gave evidence of the primary importance of the surface tests.…”