Microbiology and Immunology 2500A/B Lecture Notes - Lecture 1: Hans Christian Gram, Facultative Anaerobic Organism, Gram Staining
5 Feb 2018
School
Department
Professor
Document Summary
A current view of the tree of life. So diverse: bacterial biomass is larger than that of plants in planet. Extremists: do(cid:374)(cid:859)t (cid:272)ause hu(cid:373)a(cid:374) disease, eukaryotes, minority, less than 1% Bacteria can grow fast the smallest, simplest, and most abundant cells on earth prokaryotes include bacteria and archaea prokaryotes lack a nucleus and complex organelles. Death: used up nutrients, produce metabolic by products, generation time (doubling time) Time it takes for bacteria to divide once, do in logogriphic part some species grow fast (double in ~10 minutes) some species grow slow (double in ~24 hours) tuberculosis but in terms of humans, its so evolved. Bacterial classification by shape coccus rod: dot staphylococcus tablet, e coli, salmonella spirillum lyme disease corkscrew. Bacterial classification by o2 utilization: obligate aerobe require oxygen for growth, obligate anaerobe oxygen is toxic for growth (intestinal) Facultative anaerobe can use oxygen if present, but can also grow without oxygen.
