The role of plasmids in resistance of Salmonella to several antibiotics

Abstract

During the recent study, the bacterium Salmonella was isolated from sewage using salmonella-shigella-agar and diagnosed according to cultural properties where the colonies appeared pale with black center.The sensitivity test was preformed for this bacterium against several antibiotics using disc technique. The results appeared that this bacterium was sensitive to the antibiotics amicacin, chloramphinicol, trimethoprin, doxycycline and streptomycine and resistant to tetracycline and lincomycin.Plasmid curing using elevated temperatures revealed that the resistance to tetracycline was carried on plasmid genes.