The present book deals with the biology of a wide range of coccidia of numerous genera including Emeria, Isospora, Sarcocystis, Toxoplasma, Caryospora, and Cryptosporidium. The book will be valuable for advanced undergraduates, graduate students, research workers, and teachers in biology, especially useful for parasitologists teaching the subject and essential for coccidiologists doing research on coccidia. The book has also an appeal for physicians, veterinarians, and zoologists needing an update of information in the general field of coccidiosis