Clinical microbiology is the study of micro-organisms that caused infections and diseases to Human and other animals. It is an adaptation of microbiological techniques to the study of etiological agents of infectious disease. It often deals with hospital-acquired and public-health problems that affect both hospital and community. It is related to the laboratory diagnosis of human and animal infections and the role of the laboratory in both the management of infectious diseases and the elucidation of the epidemiology of infections. The latest developments in clinical microbiology and immunology, providing the current state of knowledge in the field, as well as balanced, thought-provoking perspectives on controversial issues.