Inactivation of bacteria on surfaces by sprayed slightly acidic hypochlorousacid water: in vitro experiments

[摘要] References(50)The capacity of slightly acidic hypochlorous acid water (SAHW), in both liquid and sprayform, to inactivate bacteria was evaluated as a potential candidate for biosecurityenhancement in poultry production. SAHW (containing 50 or 100 ppm chlorine, pH 6) was ableto inactivate Escherichia coli and Salmonella Infantisin liquid to below detectable levels (�?2.6 log10 CFU/ml)within 5 sec of exposure. In addition, SAHW antibacterial capacity was evaluated byspraying it using a nebulizer into a box containing these bacteria, which were present onthe surfaces of glass plates and rayon sheets. SAHW was able to inactivate both bacterialspecies on the glass plates (dry condition) and rayon sheets within 5 min spraying and 5min contact times, with the exception of 50 ppm SAHW on the rayon sheets. Furthermore, acorrosivity test determined that SAHW does not corrode metallic objects, even at thelongest exposure times (83 days). Our findings demonstrate that SAHW is a good candidatefor biosecurity enhancement in the poultry industry. Spraying it on the surfaces ofobjects, eggshells, egg incubators and transport cages could reduce the chances ofcontamination and disease transmission. These results augment previous findingsdemonstrating the competence of SAHW as an anti-viral disinfectant.

[学科分类] 兽医学

[关键词] bacteria;biosecurity;SAHW (slightly acidic hypochlorous acid water);spraying;surface disinfection