The first in a series of four books, this comprehensive work details the molecular detection of major human viral, bacterial, fungal, and parasitic pathogens. Focusing on sample preparation and molecular detection procedures, each chapter presents a concise review of the pathogen concerned including its taxonomy, biology, epidemiology and pathogenesis; a description of clinical sample collection preparation procedures; a summary of molecular detection methods; representative molecular detection protocols; and a discussion on the challenges, limitations, and advantages for the current methods as well as further research required to improve diagnosis.