A study of the structure, function, and practical significance of disease-producing and beneficial microorganisms. Lecture topics will include the structure, physiology, genetics, and classification of bacteria, viruses, and disease-producing eukaryotes. Disease production by microorganisms, disease pathology, and microbial control will also be discussed. The laboratory will instruct students in the methods and procedures used in growth, identification, and control of micro-organisms. Prerequisites: BIOL 121 and BIOL 123. Counts on the biology major in the cell and molecular group.