BMB 300 Lecture Notes - Lecture 23: Microorganism, Escherichia Coli, Virulence Factor

• School: University of Maine
• Department: Micro and Molecular Biology
• Course: BMB 300
• Professor: Edward Bernard

Document Summary

We have about 10x more bacteria than animal cells. Resident flora means it has a specific place/tissue in the body. example: e. coli is found in the intestinal tract. Transient flora: bacteria moved from one place in the body to another. E. coli on hands of someone who did not wash their hands. Damp areas are more likely to be colonized such as under the arms. Bacteria on the skin need to be dehydration resistant. Environment is somewhat hostile for many bacteria. skin bacteria are usually gram (+). Over 500 different species of bacteria in the mouth. Picture is of taste buds with rod shaped bacteria in it. Chewing food is mechanical grinding, which displace bacteria. tongue does as well. pockets between teeth are anaerobic. There should not be a lot of bacteria in the lungs. when there is, you cough and form mucus to get rid of them.