This prepared the Arabic translation of the book to provide the reader with the Arab fundamentals this science and its development in a manner characterized by simplicity, clarity and brevity, and although it does not require prior knowledge of the reader organisms minute but it is supposed to be conversant with some of the life sciences and chemistry in particular, in addition to a modest level of knowledge immunodeficiency. The section of the book, several chapters including: the importance of biology and accurate microscope, and female winners, bacteria and parasites, and viruses, and the basic chemistry and their relationship to the knowledge of microbiology and cellular composition and characteristics of microorganisms and Introduction to Ouheidat cell.