Field trial to monitor the efficacy of some commercial poultry disinfection on Salmonella typhymurium through cold fogging

The recovered results showed that: the incidence of Salmonella typhymurium in observed commercial egg-layer flocks; isolation from 5 flocks (33.7 %) out 15 flocks, mortalities rates at end 78 weeks age was 16 % and also, current egg-production, average egg weight, hen housed day, percent peak egg-production were: 68 %,59.2 gm, 68.4%, 318, 78% 70%, respectively. efficacy most common disinfectants against determined. selected were; Formalin, Phenol, QAC, Halamid, Virkon'S Micro Sept M isolates studied egg- layers Egypt (hfq gene typhimurium). It that, S. typhimurium affected significantly only by Virkon'S, low rate application; Log 10 populations after15 mint exposure were 4.2, 4.4, respectively treatment demonstrated a significant reduction high application. is evident using formalin, phenols QAC concentration 4% ,5% 33.3 fogging other than spraying had increased action on tested pathogens after min contact time (35.7%,42.8 76.8%, respectively).