ٍSheep and goats are important agricultural animals in Egypt and were estimated in 1996 by 3.5 and 3.3 milion head respectively. Not all mycoplasmas of sheep and goats pathogenic for the host in which they are found, but among the pathogens are mycoplasmaBacillus cereus was showed high incidence (20) 40%, (12) 48%, (8)32% and (10) 40% in case of raw milk, dried milk, hard cheese and ice