Studies on the Sanitary Condition of Some Nile Fishes in Zagazig Markets

Twenty five random samples eaeh of ”Clarias lazera”and ”Bagrus bayad” were collected troin Zagazig marketsand transferred to the laboratory with the minimum ofdeJA,. where they. were subjected to keeping q,:”l9,litytests as well as to bacteriological examination.The physical exemination revealed that examinedsamples were fresh (68-93 degrees).The volatile basic nitrogen content in the musclesof both samples ranged from 11.2 to 16.8 mg. nitrogen/100 g. The surface total colony count was comparetivelyhigher than that of the muscles in all examined fishes •• Mesophiles predominate as higher counts were obtainedat 25°0 incubation.• Organoleptic examination, manifested by chemic~l analysis& con!ir.med by bacteriological examination proved thatexamined” fishes can be considered f~esh.