THE ANTIBACTERIAL EFFECTS FOR SALMONELLA-ENTERITIDIS PHAGE TYPE-4 OF DIFFERENT CHEMICAL DISINFECTANTS AND CLEANING AGENTS TESTED UNDER DIFFERENT CONDITIONS

A selection of commercially available disinfectants, sanitizers and wa ter sanitizers based on iodophor, quaternary ammonium compounds (QACs) and phenolic compounds were tested for their activity against a phage type 4 strain of Salmonella serotype Enteritidis in the presence of a variety of organic materials. In general the phenolic preparations we re the most effective followed by the QACs and the iodophors. They wer e all inactivated to different degrees by chick fluff, chicken faeces, feed and wood shavings. The inactivation was greatest when Salmonella organisms were pre-dried in feed. Under these conditions formaldehyde and glutaraldehyde were still active. There was some evidence that in duced resistance to stress conditions including culture at 42 degrees C and anaerobic culture increased resistance to one of the water sanit izers.