Gram positive bacteria Flashcards
What are the clinically significant Gram positive bacteria species
Staphylococcus aureas
Strep pneumonia
Strep pyogenes
Clodistrium difficile
What are the two from of cocci bacteria
Streptococci (Chains)
Staphycocci (Clusters)
What test differentiates staphylcocci
coagluse
What staphylcocci species is positive on coagulate test
staphyl aureas
What staphylcocci species is negative on coagulate test
staphyl epidermis
How are different species of streptococci distinguished
blood agar
Blood agar turns white in beta haemolytic for what two streptococci species
A - Strep pyogenes
B - Strep agalactiae
Blood agar turns green in alpha haemolytic (partial breakdown of RBC) for what two streptococci species
Strep Pneumonia
Strep. Viridans
What Bacili are anaerobic
Clostridium
What is the most clinically significant clostridium
clostridium difficile
What are 3 important families of gram positive bacteria
Staphylococci
Streptococci
Clostrdium
Where is clostrdium difficile found
Gut
Why shouldn’t antibiotics be used to treat clostrdium difficile
Will decrease competition by wiping out gut flora
What causes tetnus
Clostridium tetani
What does clostridium prefringes cause
Gas gangrene
Clostrdium difficile releases a toxin that causes what
Collitis
How is clostridium difficile detected
Antigen test
Where is staphyl epidermis located
skin
When does staphyl epidermis become pathogenic
If first line of defence broken in immunosuppressed people
Where is staphyl aureas located
mainly the nose
what are the possible diseases caused by staphyl aureas
Pneumonia
Septicaemia
Skin infections - boils
Food poisoning
What staphyococci is more pathogenic
staphyl aureas is more pathogenic that staphyl epidermis
What are the most important antigen group of beta haemolytic streptococci
A
B
D
What does A strep proyogenes located and what does it cause
skin
necotisfascitis
