A survey of microorganisms: bacteria, viruses, rickettsia, protozoa, algae and fungi. Major emphasis is placed upon bacteria: classification, genetics, ecology, morphology, physiology, physical and chemical control and economic importance. An introduction to applications of microbiology to food and water analysis, industry and medicine, including principles of immunology and transmission of infectious diseases. This course is designed for the Liberal Arts or science-interested student. Three class hours, three laboratory hours. Prerequisites: BIO 156 as prerequisite or corequisite, and CHE 145 or CHE 151 with a grade of C- or better, or permission of instructor. Students who have completed BIO 156 with a grade below C- are advised to repeat BIO 156 before attempting BIO 209. 4 Credits