Gram Positive Cocci Flashcards
What organism is:
Catalase +
Bacitracin S
Oxidize glucose
With yellow smooth colonies
Micro coccus
What organism is:
Catalase +
Bacitracin R
Coagulate +
Small buff beta hemolytic colonies
Staphylococcus aureus
What organism is:
Catalase +
Bacitracin R
Coagulase -
Novobiocin S
White pinpoint colonies
Staphylococcus epidermidis
What organism is:
Catalase +
Bacitracin R
Coagulase -
Novobiocin R
Medium white colonies
Staphylococcus saprophiticus
What organism is:
Catalase -
Bile esculin +
6.5% NaCl +
Optochin R
Small white colonies
Enterococcus faecalis
Catalase - Bile esculin - Beta hemolytic SXT S Bacitracin R
Group C Streptococcus
Catalase -
Bile esculin +
6.5% NaCl -
Group D Strep
Catalase - Bile esculin- Beta hemolytic SXT R BACITRACIN R CAMP +
White pinpoint colonies
Group B strep ( agalactiae)
Catalase - Bile esculin- Beta hemolytic SXT R BACITRACIN S CAMP - Hippurate -
White pinpoint colonies
Group A Strep
Streptococcus pyogenes
Catalase - Bile esculin - Alpha hemolytic Optochin S Bile solubility + Med large grey
Streptococcus pneumoniae
Catalase - Bile esculin - Alpha hemolysis Optochin R Bile solubility -
Viridans Strep
what enzymes does S. aureus produce?
hemolysins leukocidins coagulase hyaluronidase nuclease protease lipase Beta lactamase
what are characteristics of streptolysin S?
stable in O2
non-antigenic
what are characteristics of streptolysin O?
oxygen labile
antigenic
what infections can be caused by s. pyogenes?
pharyngitis impetigo eryipselas wounds rheumatic fever glomerulonephritis scarlet fever
what infections are caused by s. pneumoniae?
most common cause of community acquired pneumonia
meningitis
otitis media
conjunctivitis
what infection can S. viridans cause?
endocarditis
S. aureus infections
cutaneous ( scalded skin syndrome / wound)
TSS
food poisoning
S. saprophyticus infection
UTI in young sexually active females
prostatitis
GBS infections
most common cause of neonatal septicemia and meningitis
enterococcus infections
nosocomial UTI
wound infections
bacteremia
What staph species produces slime?
S epidermidis
What two antibiotics are used to differentiate staph and micrococcus?
Bacitracin - staph R
Furazolidone - staph S
Compare staph and micrococcus
Staph: modified oxidase -, lysostaphin S, bacitracin R, furazolidane S
Micrococcus: modified oxidase +, lysostaphin R, bacitracin S, furazolidane R
What toxins does staph aureus produce?
Exfoliatins
Enterotoxins (most food poisoning A and B)
Incubation period staph food poisoning
2 -6 hours
Only PYR + beta hemolytic strep
Group A
Enterococcus is inherently resistant to what?
B lactam antibiotics
Aminoglycosides
Quellung reaction
Capsular swelling test for strep pneumoniae in body fluids
Only strep sensitive to bacitracin
Pyogenes
