Staphylococcus Flashcards
Where can Staphylococci be found
occur worldwide, commensals on skin, muc. memb.
food, plants, soil, water
Satphyl. can also sometime be found in the upper resp. tract and the lower Ug tract T/F
T
Morphology of S
Coccus 1 micrometer in diameter
form irregular clusters - bunch of grapes
S are flagellated Bb T/F
F
S are spore forming Bb T/F
F
S are non capsulated Bb T/F
T
S have flagella and a capsule while exposed to CO2 T/f
F
S are motile Bb despite having no flagella T/F
F
Which agar do S need
simple nutrient agar
Do S need oxygen
not necessarily
What are S in regard to oxygen
facultative anaerobs
How can S be categorized
coagulase +
coagulase -
On which medium can S be cultured
simple nutrient agar
Do S from pigments
yes
Which pigments do S form
white , golden (Ru,Ho strains)
How can you culture S selectively
10%NaCl - mannitol - phenolred agar
OR
Na tellurite - glycine - pyruvic acid - eggyolk - Baird parker agar
What do S colonies look like on Baird parker agar
black
C O
catalase +
oxidase -
O F test
fermentative
Characterise coagulase + S
- ec enzymes
- toxins
- haemolysis
- mannitol +
- fac. path
Characterizecoagulase - S
- less ec enzymes
- usually no toxin prod
- no haemolysis
- mannitol -
- generally saprophytes
Name the Coag. + Species
- S.aureus ssp. aureus
- S.aureus ssp. anaerobicus
- S.pseudointermedius
Name the Coag.- Species
- S.hyicus
- S.epidermidis
- S.haemolyticus
- S.gallinarum
- S.equorum
- S.Felis
What does S.aureus ssp aureus cause
lucal suppuration, abscesses, infections after surgery
