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Criado por Sophie Byrne
quase 6 anos atrás
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Questão | Responda |
What are commensal flora? | Beneficial/harmless/opportunistic pathogens Can exclude pathogens Break down indigestible food |
Give 2 examples of pathogens that are excluded by commensal flora | Candida albicans - thrush after antibiotic treatment Clostridium difficile - diarrhoea after antibiotic treatment kills of beneficial gut flora so can est itself |
Give an example of evidence to support the idea of commensal flora breaking down indigestible food | Notobiotic mice gain weight faster than non-sterile ones - gut flora harvests additional nutrients |
Example of probiotic species | Lactobacillus acidophilus |
What does bifidobacterium do? | Decrease lactose intolerance Reduce serum cholesterol Anticancer activity |
What do streptococci do and where are they found? | Opportunistic pathogen in the mouth Endocarditis if enters bloodstream of someone w/ heart problems |
What does Haemophilus influenzae do and where is it found? | Meningitis if enters bloodstream and crosses blood-brain barrier Nose |
What does Pseudomonas aeruginosa do and where is it found? | CF/immunocompromised: lung infections Burn wounds Skin and bowel |
What is the Gram positive pili important for? | Bacterial adhesion Colonisation Invasion of host tissues Biofilm formation Translocation across host membranes |
What is an example of a bacterium that uses the Gram positive pili and what does it do? | Streptococcus pneumoniae Community-acquired pneumonia (main cause) Meningitis Bacteremia Middle-ear infection |
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