Bacteria growth and identification Flashcards
What do prokaryotes and eukaryotes both have?
Cell membrane
Ribosomes
What are pilli?
Found on surface of bacteria cells and are used to adhere to bacteria and other structures
What type of salt agar is used for selective bacteria growth?
Mannitol salt agar
What does capnophilic bacteria mean?
Grows in presence of carbon dioxide
What does facultative mean?
Can grow with or without oxygen
What does microaerophilic mean?
Requires small amounts of oxygen
S aureus will turn the mannitol salt agar what colour?
Yellow
What colour do gram positive stain?
Purple due to peptidoglycan layer
What colour do gram negative bacteria stain?
Pink as Thin peptidoglycan layer
What toxins do gram negative bacteria produce?
Endotoxin
What toxins do gram negative bacteria produce?
Endotoxin
What is the gram negative endotoxin?
Lipopolysaccharide
What shape is coccus?
Circle round shape
What is meant by strepto?
Long chain
What is meant by staphyl?
Clumps
What is an example of gram positive cocci?
Dental caries caused by streptococcus mutans
What is an example of gram positive bacilli?
Clostridium tetanii
What is an example of gram negative cocci?
Neisseria meningitidis
What is an example of gram negative bacilli?
Prevotella intermedia, chronic periodontitis
What is meant by colonisation?
Presence of microorganisms in or on a host
What are risk factors for S aureus colonisation?
Antibiotic use
Diabetic, renal dialysis, HIV, obesity
Hospitalisation
Colonised partner
What is infection?
Invasion of the body by pathogenic microbes and the reaction of the tissues to their presence and to the toxins generated by them
What is an example of a S aureus infecrtion?
Angular chellitis
