Effect of diagnosis X-rays on oral bacterial survival and their sensitivity to some antibiotics.

Out of prescreening of referenced patients Staphylococcus, Streptococcus species and E.coli were isolated from contaminated dental in Erbil (16, 16 and 6 respectively). About 50% of isolated staphylococcus was resistant to all of tested antibiotic Vancomycin, Chloramphenicol, Ciproflaxin, Amoxicillin , Tetracycline (VA, C, CIP, AX and Te), but converted to sensitive after using X-ray dental diagnoses (100%). Farther, results of cultivation suggested flexibility of nuclear mutation. While, remained 50% Gram positive Staph. remains sensitive after exposure to radiation similar, results investigated in isolated Strep. species (40%) when exposure to radiation. Respectively, E.coli isolates had lesser positive response (10%) to radiation exposure. While the cell density in cell suspensions did not decrease in spite of a significant reduction in the viable counts (from 8x108 to 6x108 CFU/ml). That is mean using X-ray exposure should be affect on the total oral bacterial viability and Gram positive bacteria, seem to imply higher mutant than gram negative bacteria.