Cultivation of Bacteria Flashcards
what effects bacterial growth?
nutritional factors
environmental factors
what are abiotic environmental factors that affect bacterial growth?
temperature, pH, oxygen, CO, water availability/osmotic pressure
what are most bacteria - pick on the chart
mesophiles
what is the transport media and cultures media usual pH? why is this important
7 - has buffers to keep at this value
optimal pH for most bacteria 6.5-7.5
label the aerobic capacity of the bacteria? ex. obligate aerobe, obligate anerobe
what do anerobic bacteria require to grow?
anaerobic transport media
reducing culture media
anaerobic jar
what is a capnophile?
bacteria requiring 5-10% CO2 for optimal growth
what are most capnopiles aerobic descriptor?
microerophilic
what type of bacteria do not require NaCl but can grow under saline?
Halotolerant bacteria
how does transport media help prevent desiccation?
provide moisture until sample can be cultured
what is a chemoheterotroph?
use organic compounds for energy and carbon
what is a fastidious bacteria?
requiring additional organic compounds in their culture media
Are most bacteria chemoheterotrophic or fastidious?
chemoheterotrophic
which require more growth factors - chemoheterotrophic or fastidious?
fastidious
match the term to the description - liquid media, solid media, semi-solid agars
- used for isolation of pure cultures, estimating the number of viable bacteria
- ideal for growing large numbers of bacteria
- used for determining motility, growing microaerophiles
1 - solid media
2 - liquid media
3 - semi-solid agars