OBJECTIVE To introduce a new sequential chlorination disinfection process in which short-term free chlorine and chloramine are sequentially added. METHODS Pilot tests of this sequential chlorination were carried out in a drinking water plant. RESULTS The sequential chlorination disinfection process had the same or better efficiency on microbe (including virus) inactivation compared with the...

objective(s):electromagnetic radiations which have lethal effects on the living cells are currently also considered as a disinfective physical agent.   materials and methods: in this investigation, silver nanoparticles were applied to enhance the lethal action of low powers (100 and 180 w) of 2450 mhz electromagnetic radiation especially against escherichia coli atcc 8739. silver nanoparticles ...

Despite regular disinfection and decontamination of the hospital floors and surfaces, resistant pathogens from the hospital surfaces and their transmission to humans have been reported recently. The resistance of pathogens to the disinfectant agents or failed disinfection techniques have put the routine floor and non-critical surface disinfection done in hospitals into question with regard to t...

OBJECTIVE. Effective disinfection of hospital rooms after discharge of patients with Clostridium difficile infection (CDI) is necessary to prevent transmission. We evaluated the impact of sequential cleaning and disinfection interventions by culturing high-touch surfaces in CDI rooms after cleaning. DESIGN. Prospective intervention. SETTING. A Veterans Affairs hospital. INTERVENTIONS. During a ...

Titania (TiO2) induced photocatalysis has been widely investigated and applied as a disinfection strategy in many industrial and clinical applications. Reactive oxygen species (ROS), including hydroxyl radicals (•OH), superoxide radicals ( − •2 O ) and hydrogen peroxide (H2O2), generated in the photocatalytic reaction process are considered to be the active components prompting the bactericidal...

The main objective of this study is removal of pathogenic bacteria using electrochemical process. The bactericidal effects of electrochemical system containing steel mesh electrode were evaluated from contaminated water with E. coli, Pseudomonas aeroginosa, Staphylococcus aureous and Streptococcus fecalis at various concentrations. Effect of current density, supporting electrolyte and pathogeni...

Cleaning and disinfection practices of environmental surfaces are critical interventions for reducing health care-associated infections. We studied the value of ready-to-use cleaning and disinfection wipes compared with the traditional towel and bucket method. When using ready-to-use wipes, we found compliance to be significantly higher, a more rapid cleaning and disinfection process, and poten...

OBJECTIVE to assess the efficiency of cleaning/disinfection of surfaces of an Intensive Care Unit. METHOD descriptive-exploratory study with quantitative approach conducted over the course of four weeks. Visual inspection, bioluminescence adenosine triphosphate and microbiological indicators were used to indicate cleanliness/disinfection. Five surfaces (bed rails, bedside tables, infusion pum...