studies on the hygiene of incubation and hatchery practice

Investigations were carried out to compare the effect of different methods of treating hatching eggs before setting and durin incubation.700 ef,gs obtained from disease-free flock were used in this work.Dry cleaning of soiled eg~s with wire wool is recommended as it proved to be the method giving the hicr,hest hatchability percentar:;e.Moist treatment by using detergents, disinfectants or antibiotics cannot be recommended as a successful means £ortreatment of eg”,s prior to incubation.Fu~igation of eggs prior to incubation for 10 minutes is a satisfactory and successful means for controlling contamination durin incubation.Combined treatment by usinr; wire wool and fumigation for 10 minutes is highly recommended as a reliable method for treat- ment of e~gs prior to incubation’I’he Lnve s t i.na b.i.on showed tha.t the most predominant isolates .were oavu l.aae positive .