The essential topics in serological diagnosis are elaborated in this extensive book. This book elucidates the theory of serological procedures applied in laboratory diagnoses of specific bacteria, mycoplasmas and viruses in humans, animals and plants; a few parasitic agents, along with autoimmune diseases. Experts have contributed latest information pertaining to the serological processes in laboratory diagnosis of such contagious diseases. Serological methods for bacteria; serological methods in human, animal and plant viruses; diagnosis of echinococcus and human toxocariasis agents; and serological laboratory methods in the diagnosis of coeliac disease have been elucidated in this book.