TREATMENT OF ARTIFICIALLY CONTAMINATED HA TCHING EGGS WITH DISINFECTANTS TO CONTROL SALMONELLA-ENTERITIDIS

The efficacy of the treatment of hatching eggs, using pressure differe ntial dipping, with a number of disinfectants was investigated. The ha tchability and the decontamination effect for Salmonella enteritidis, after artificial contamination, were determined. The dipping of white or brown shell hatching eggs in 2% and 5% H2O2 did not adversely affec t the hatchability. The use of a 3% solution of an aldehyde-phenol-alc ohol based disinfectant (Lysovet-PA) produced a significant reduction in hatchability. The dipping of infected eggs in H2O2 resulted in a si gnificant reduction of isolation rate of S. enteritidis until the 19th day of incubation and H2O2 treated eggs revealed no reduction in the isolation rate as a result of the risks of horizontal transmission in the hatchery.