Anaerobic parasitic protozoa cause medically and economically important diseases such as dysentery, sexually transmitted infections and gastroenteritis that affect millions of people worldwide annually. Recently the genomes of the three key anaerobic protozoa, Trichomonas, Giardia and Entamoeba, have been determined. In this book internationally acclaimed researchers critically review the most important aspects of research in this area, providing the first coherent picture of the genomics and molecular biology since the publication of the genomes.