Phenotypic detection of ESBL producers by Combination disc method and Double disc synergy test respectively; A) The presence of elliptical inhibitory zone between cefotaxime and augmentin indicate the ESBL positive organism; B) Positive results are shown by increase in > 5-mm zone diameter for either antimicrobial agent tested in combination with clavulanate vs the zone diameter of the agent when tested alone; CAZ, Ceftazidime disc; CTX, Cefotaxime disc.