FA Gram Neg Rods I Flashcards Preview

Micro > FA Gram Neg Rods I > Flashcards

Flashcards in FA Gram Neg Rods I Deck (30):
1

Small gram neg coccobacillary rod with aerosol transmission that produces IgA protease

H influenzae B

2

Most invasive disease caused by H flu type

B

3

What strains of H flu cause mucosal infections (conjunctivitis, bronchitis, otitis media)?

Nontypeable

4

HaEMOPhilus causes

Epiglottitis ("cherry red" in children)
Meningitis
Otitis media
Penumonia

5

How do you treat H flu mucosal infections?

amoxicillin +/- clvulanate

6

How do you treat H flu B meningitis?

ceftriaxone to the person and rifampin to close contacts

7

when a child has H flu, mom goes to five and dime store for chocolate

Culture on chocolate agar requires factor V (NAD+) and X (hematin) for growth; can also be growth with Staph Aureus, wh/ provides factor V

8

H flu vaccine contains

type B capsular polysaccharide conjugated to diphtheria toxoid or other protein

9

at what age do you give HiB vaccine?

2 mo - 18 mos

10

H flu epiglottitis on lateral neck radiograph

"Thumbprint sign"

11

Gram negative rod that stains poorly, so usually use silver stain to visulaize

legionella pneumophilia

12

electrolyte abnormality w/ legionella pneumophila

hyponatremia

13

on what culture does legionella grow?

Charcoal yeast extract culture with iron and cysteine

14

how is legionella detected clinically?

presence of antigen in urine

15

legionella transmission

aerosal transmissionf rom environmental water source habitat (air conditioning, hot water tanks). NO person-to-person transmission

16

legionella treatment

macrolide or quinolone

17

severe pneumonia + fever + GI and CNS symptoms

Legionnaire's disease

18

what do you call a mild flu-like syndrome caused by legionella?

Pontiac fever

19

Aerobic, gram neg rod, non-lactose fermenting, oxidase _

pseudomonas aeruginosa

20

What type of pigment and odor does pseudomonas produce?

pyocanin (blue-green pigment); grape-like odor

21

Tell me about pseudomonas toxins

Endotoxin --> fever + shock
exotoxin A --> inactivates EF-2

22

Malignant otitis externa in diabetics

Pseudomonas

23

Associated with wound and burn infections

Pseudomonas

24

PSEUDOmonas

Pneumonia esp in CF
Sepsis
External otitis media (swimmer's ear)
UTI
Drug use & Diabetic osteomyelitis

25

Hot tub folliculitis

Pseudomonas

26

What do you call the rapidly progressive necrotic cutaneous lesions caused by Pseucdomonas bacteremia that you typically seen in immunocompromised patients

Ecthyma gangrenossum

27

How do you treat Pseudomonas

Aminoglycoside plus extended specter penicillin (piperacillin, ticarcillin, cefepime, imipenem, meropenem)

28

Chronic pneumonia in CF patients caused by Pseudomonas is associated with

biofilm

29

Psudomonas AERugoinosa

AERobic, think water connection and blue-green pigment

30

burn victim

Pseudomonas