MIC 201 Lecture Notes - Lecture 5: Maclyn Mccarty, George Beadle, Archaea
Document Summary
Microscopy discovery of the very small: robert hooke published micrographia in 1665, anton von leeuwenhoek was skilled in grinding lenses and described. In the 1600s, many people thought life generated spontaneously from putrid and decaying materials: leeuwenhoek suggested maggots arose from eggs in the decaying material, not the material itself. Francesco redi found that if flies were prevented from landing on meat, it did not produce maggots. In 1859, louis pasteur discredited the idea of spontaneous generation. Epidemiology understanding disease transmission: epidemiology is the study of the source, cause, and mode of transmission of disease. Ignaz semmelweis determined the source of blood poisoning of women in childbirth. John snow determined the cause of cholera transmission in london. Variolation and vaccination prevention of infectious diseas: variolation involved exposing individuals to dried smallpox specimens, edward jenner developed vaccination, inoculating individuals with cowpox. The stage is set: advances in microscopy allowed for more investigation of microbes.
