Bacteria Labs Flashcards
What tests positive for catalase test?
Micrococcaceae
What tests negative for catalase test?
- streptococcus
- enterococcus
What do you test streptococcus and enterococcus for further differentiation?
Hemolysis
Is S.pyogenes suscept/resistant to bacitracin susceptibility test?
Susceptible
What type of hemolysis does S. Pyogenes undergo?
Beta-hemolysis
Is S. pneumonia resistant/susceptible to optochin-susceptibility?
Susceptible
What type of hemolysis does S. pneumonia undergo?
Alpha-hemolysis
What tests positive in catalase test?
Micrococcacea
What do you test micrococcacea to differentiate ?
- dextrose fermentation
- nitrofurantoin-susceptibility
What tests positive for dextrose fermentation and nitrofurantoin-susceptibility?
Staphylococcus
What tests negative for dextrose fermentation and niteofurantoin susceptibility?
Micrococcus
What tests positive in a coagulase test?
Staph. Aurius
What tests negative in a coagulase test?
CNS (coagulase negative staph.)
What is resistant to novibiocin susceptibility test?
Staph. Saprophyticus
What is susceptible to novibiocin-susceptibility?
- staph. Epidermis
- staph. Hemolyticus
What is positive in urease activity test?
Staph. Epidermis
What is negative in urease test?
Staph. hemolyticus
What is strep. pyogenes susceptible to?
Bacitracin
What is strepto. pneumonia susceptible to?
Optochin
What types of colonies are formed by streptococcus pyogenes?
- matte
- mucoid
- smooth (glossy)
What is M protein and what produced it?
It is a virulence factor.
Produced by some streptococcus species
Which colonies of streptococcus pyogenes has virulent strains?
- mucoid
- matte
(Due to presence of M-protein)
Which colony of strepto. pyogenes is avirulent?
-smooth (glossy)
B/c no M protein present
What is the pathogeny of streptococcus pyogenes?
Obligate pathogen
Must cause disease in order to be transmitted from one host to another
