BACTERIAL CULTURE AND GROWTH

nutrients needed in large quantities

macronutrients

nutrients needed in small quantities

micronutrients

supportive media supplemented with special nutrients

enriched media

allows for the growth of particular microorganism while inhibiting the growth of others

selective media

distinguishes among different groups of microbes based on their biological characteristics

differential media

what type of culture can you observe microbial growth in

liquid

phase where bacterium are metabolically active (adapting) but not dividing

lag phase

phase where bacterium are growing more than dying

exponential phase

what synthesizes first in the exponential phase

primary metabolites (lipids, amino acids, nucleic acids)

what synthesizes second in the exponential phase

secondary metabolites (antibiotics, toxins, immunosuppressants)

what phase is most susceptible to antibiotics

exponential phase

phase with high population but equal amounts of growth and death

stationary phase

phase where more bacterium are dying than growing (exponentially)

death phase

phase where bacteria evolve to allow for persistent survival; death and growth rates are equal

long-term stationary phase