BIOL 220 Study Guide - Comprehensive Final Exam Guide - Bacteria, Oxygen, Prokaryote
Document Summary
Microscopy and structural characteristics of microbes: in 1929, alexander flemming discovered that penicillium mold generated a substance that kills bacteria. Penicillin was the first commercial antibiotic to save human lives. Medical microbiology: germ theory of disease. Many diseases are caused by microbes: robert koch. Applied his methods to numerous lethal diseases around the world. Koch"s postulates: criteria for establishing a causative link between an infectious agent and a disease. The microbe is found in all cases of the disease but is absent from healthy individuals. The microbe is isolated from the diseased host and grown in pure culture. When the microbe is introduced into a healthy but susceptible host the same disease occurs. The same strain of microbe is obtained from the newly diseased bacteria. Barry marshal: drank helicobacter pylori to fulfill koch"s postulate that it was causative organism of stomach ulcers. Sergei winogradksy: among the first to discover bacterial in natural habitats.
