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Flashcards in Micro IV Deck (68)
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1

What are the two major coagulase negative staph?

Epidermidis
Saprophyticus

2

What is the second most common cause of UTIs in young women?

S. Saprophyticus

3

What are the components of the cell capsule?

Teichoic acid and peptidoglycan

4

True or false: the thicker the cell wall, the more effective the PCN

True

5

What is the drug that is used to prevent loss of PCN through the urine?

Probenecid

6

What is the mnemonic for the hemolytic patterns?

Best lysis
Almost lysis
Garbage

7

What happens to C3 with strep infections?

Decreases

8

recent h/o tooth extraction = ?

Strep mutans

9

h/o IV drug use = ?

S. Aureus

10

h/o prosthesis placement = ?

Staph Epidermidis

11

What is the treatment for staph epidermidis?

***

12

Which heart valve is most commonly involved
in viridan endocarditis?

mitral

13

What are the erythematous painless lesions
seen on the palms and soles of patients with
viridian infections?

Janeway lesions--septic valvular embolism or immune complexes

14

What are the raised painful lesions on the
fingers and toes called?

Osler nodes

15

A male dental patient with a childhood history
of mitral regurgitation is scheduled for extraction of two decayed teeth. The most commonly used prophylactic measure in this patient would be administration of what?

Amoxicillin

16

What are the fingernail findings of strep viridans heart infx?

Subungual hematomas

17

Which are painful: osler nodes or janeway lesions?

Osler nodes

18

What are the Roth's spots found with bacterial endocarditis? What causes them?

retinal hemorrhage with white or place centers composed of coagulat fibrin.

They are usually caused by immune complexes medicated vasculitis

19

What is the most common cause of Otitis externa?

Pseudomonas

20

What are the classic s/sx of endocarditis? (5)

-infx
-New murmur
-Osler nodes / Janeway lesions
-Roth spots
-Septic shock

21

What is the treatment for endocarditis?

Empiric treatment with broad spectrum abx and obtain blood cultures

22

What is the only CAMP positive strep?

GBS

23

What is the classic shape of N. Meningitidis?

Gram negative kidney bean diplococci

24

Is Neisseria Meningitidis oxidase positive or negative?

+

25

What is the agar that is used to culture Neisseria meningitidis?

Chocolate agar with CO2

26

What are the two major virulence factors associated with Neisseria meningitidis?

-CHO anti-phagocytic capsule
-Endotoxin (LPS)

27

What is the treatment for Neisseria meningitidis?

PCN G or ceftriaxone

28

How do you differentiate between Neisseria meningitidis and other Neisseria species?

Meningitidis ferments maltose

Gonococcus only glucose

29

Is N. Meningitidis aerobic?

yes

30

What are the bugs that have an antiphagocytic capsule?

-Strep pyogenes
-GBS
-Strep pneumoniae
-N. Meningitidis
-HiB
-E. Coli K1
-Cryptococcus neoformans

("some nasty killers have a carb Kapsule")