Antibiotics Flashcards
Sterile
If something is sterile it’s considered to be free of all viable bacteria bacterial spores fungus fungal spores and viruses
Methods of sterilisation
Flaming
Moist heat
Filtration
Ionising radiation
Chemicals
How do antibiotics affect bacteria
Inhibit cell synthesis
Disrupt cell membrane
Affect nucleic acids
Affect protein synthesis
Factors affecting growth
Nutrient availability
Oxygen availability
Ph
Temp
Antibiotics
Chemicals that can limit the growth of unwanted microorganisms
Skin residents
Mostly found in dead skin or associated with oil and sweat glands
Resident Bacteria
Compete with pathogens for nutrients
May Lower ph to make it less likely for other pathogens to grow
May produce toxins to kill invading bacteria
Disinfection
The reduction in the number of microorganisms so pathogens are not present
How do disinfectants work
By damaging microbial cell such as membranes lipids dna and proteins
