Lab Flashcards
5 nutritional needs of MOs
Water
Nitrogen
Carbon
Minerals
Buffer
Best pH for fungi?
5-6
List 5 aerobic MOs families
Pseudomonas
Brucella
Neisseria
Bordetella
Fracisella
What is enrichment incubation?
Selective incubation for a specific spp
Minimum bacteria/mL for turbidity in a broth?
10^6
Agarose temperature landmarks
<95 for sterilization
55-60 for distribution
<50 for incubation
Agar deep vs slant
Deep = Anaerobic
Slant= aerobic
4 agars that are selective + differential ?
MacConkey
Mannitol salt
Hektoen enteric
XLD
What is mannitol salt agar selective for and how?
Staphylococcus > salty
What bacteria is non lactose fermenter G-? What is its color on Hektoen enteric agar?
Shigella ; blue
What bacteria is lactose fermenter G-? What is its color on Hektoen enteric agar?
E. Coli ; yellow
What bacteria is H2S producer G-? What is its color on Hektoen enteric agar?
Salmonella ; black
XLD vs Hektoen Enteric?
Shigella>
Blue in HE ; Pink in XLD
What MO has a swarming colony?
Proteus
What is thayer martin selective forv
N meningitis & N gonorrhea