Campylobacter species are common bacterial pathogens that cause gastro enteritis in humans, both in industrialized and developing countries.The present study aimed to detect  the antimicrobial resistance of Campylobacter jejuni isolated  from chicken ,some animal products and human, to detect the viability of C.jejuni in experiementally contaminated yoghurt preserved at 4 °c  and to study the effect of 0.5% acetic acid and 4 ml of citric acid on the survival of C.jejuni experiementally inoculated in chicken meat samples. A total of 565 samples were collected . 315 samples from chicken , 122 samples from animal products and 128 human stool swabs. All samples were examined bacteriologically for detection of Campylobacter species using conventional methods. The results revealed that 17.34 % were positive for Campylobacter spp < /em>. , 66.32% out of them were identified as  C.jejuni . The percentage of antimicrobial resistance of C.jejuni to cephalothin , oxytetracycline, erythromycin , nalidixic acid , ampicillin and gentamicin were 94.7%,63.1%, 52.6% ,36.8% , 21.1% and 5.3% respectively. Also C.jejuni can survive in yoghurt for 7^th day after contamination and refrigeration but destructed by addition of 0.5% acetic acid for 30 minutes or 4 ml of citric acid for 1½ hours.