Serological Diagnosis handbook establishes an easy approach for the students going through their studies in the field of Medical Science. This handbook describes the principles, applications, and design of the Serologiacal Techniques most commonly used in laboratory, because techniques changes with time, we have stressed fundamental principles of serological techniques, avoiding detailed descriptions and photographs of specific tests. Furthermore, because Medical Technology is an interdisciplinary field requiring good communication with health-care personnel, we have provided some applications for each type of Serological test. Medical laboratories play a major role in the diagnosis, treatment, prognosis and monitoring of diseases. In short the aim of this book is to provide a meaningful and comprehensive picture of Serological Techniques commonly used in a medical Laboratory.