BIOL 2302 Lecture Notes - Lecture 3: Time Point, Vancomycin, Generation Time
25 Oct 2016
School
Department
Course
Professor
Document Summary
Some types of bacteria can easily be propagated in the lab for study. Solid media(plates) and liquid media(flasks) are used. Growth media contains amino acids and sugars that control bacterial growth. Plates also contain agar, a solid jello-like support substance. Bacterial growth is exponential until nutrients run out. B=number of cells at later point in exponential phase. B=number of cells at earlier time point in exponential phase t=time between the time points. Resistance to the antibiotic vancomycin rose dramatically over the 1990s in the us hospital intensive care units. A bunch of bacteria including a resistant variety get bathed in antibiotics. The resistant bacteria multiply and become more common. Eventually, the entire inection evolves into a resistant strain. Sustain a mutation in their own genome. Taking in a piece of foreign dna, such as a plasmid, which contains a reisstance. Because most antibiotics only work on actively growing cells, the persisters escape killing.
