It is the study of microbes,such as bacteria, viruses, fungi and parasites, which causes human illness and their role in the disease .Clinical microbiology receives almost any clinical specimen,including swabs,feces,urine, blood,sputum,cerebrospinal fluid,synovial fluid,possible infected tissue. The work here is mainly concerned with cultures,to look for suspected pathogens which, if found, are identified based on biochemical tests. In addition, sensitivity testing is carried out to determine whether the pathogen is sensitive or resistant to a suggested medicine