Lec 3-4 - Staph Flashcards Preview

Dental Microbiology > Lec 3-4 - Staph > Flashcards

Flashcards in Lec 3-4 - Staph Deck (38):
1

three important staphs

staph aureus, staph epidermidis, staph saprophyticus

2

staph size

.7-1.2 microns

3

s aureus are usually blank color and blank hemolysis

off white or yellow, beta

4

s epidermidis are usually blank color colonies

opaque white

5

staph is not blank so it can grow on bunch of agars

fastidious

6

do staph form spores

no

7

do staph move

no

8

nutrients created by staph

facultative anaerobe

9

staph is catalase blank

positive usually

10

coagulase positive means blank

pathogenic staph

11

s aureus and intermedius is coagulase blank

positive

12

s epidermidis is coagulase blank

negative

13

peptidoglycan makes up this much of cell wall weight, teichoic acid makes up this much, protein a makes up this much

50, 40, 5

14

s aureus is resistant to blank but susceptible to blank

lysozyme, lysostaphin

15

teichoic acid binds to blank in the host

fibronectin

16

protein a binds to blank of antibodies

Fc

17

s saprophyticus are usually in blank

genitourinary

18

staph is associated with these parts of the mouth but not the gingival crevice

saliva, teeth

19

staph and strep are usually the cause of blank lesions

root caries

20

main carriers of s aureus

noses of hospital personnel, vagina during periods

21

s epidermidis causes blank

uti hospital acquired (opportunistic), endocarditis, biofilms

22

s saprophyticus causes blank

uti community acquired

23

staph usually causes these infections

cutaneous, serious diseases, pneumonia, septicemia, food poisoning, toxic shock

24

staph toxins are dangerous and can cause food poisoning and are superantigens and heat stable up to 100 degrees C for several minutes and can be used as a blank

bio warfare agent

25

s epidermidis is blank resistant to methicillin

80 percent

26

biofilm formation by s epidermidis is induced by blank and encoded by blank

stress, ica operon

27

biofilm is often formed on blank

prosthetic devices

28

penicilllin and methicillin are blank antibioitcs interfere with cell wall formation by messing with PBP

beta lactam

29

vancomycin antibiotics are blank antibiotics and interfere with cell wall formation by binding to D Ala D Ala residues

glycopeptide

30

vancomycin is used to treat blank infections

mrsa

31

cyclic lipopeptide that binds to bacterial cell membrane causes rapid depolarization

daptomycin

32

beta lactamase resistance is due to an enzyme that destroys the beta lactam ring via the encoding of this gene

blaZ

33

intrinsic methiciillin resistance is from the staphylococcal cassette chromosome blank

mec (SCCmec)

34

main way to tell apart HA MRSA and CA MRSA

HA MRSA doesnt have PVL (leukotoxin) but CA does

35

HA infections are usually more blank

invasive

36

CA infections are usually more blank

necrotizing

37

CA infections are genetically different than HA and are susceptible to blank antibioitics

non beta lactam... such as tetracycline, sulfa drugs, vancomycin

38

this is for s aureus screening

CHROMagar of nasal/rectal samples