COMPARATIVE STUDY BETWEEN THE EFFECT OF GAMMA IRRADIATION AND OZONE GAS ON THE INCIDENCE OF E. COLI O157:H7 IN BEEF BURGER SOLD IN ASSIUT GOVERNORATE
Assiut Veterinary Medical Journal/Maǧallaẗ Asyūṭ al-ṭibiyyaẗ al-baytariyyaẗ