7. Upper Respiratory Flashcards Preview

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Flashcards in 7. Upper Respiratory Deck (56):
1

Media used to detect MRSA

Mannitol salt agar
Chromagar

2

Eikenella corrodens is associated w/ what infection?

Perimandibular space infections

3

How to get a true middle ear specimen?

Collect fluid from behind tympanic membrane
(needle through eardrum if still intact; otherwise thin swab if broken eardrum)

4

When are group A/C/G strep reported?

Group A - always, regardless of amount

Groups C/G - only if it' the predominant organism

5

Usual organism that causes epiglottis

Haemophilus influenzae type b

6

Primary etiologic agent of croup?

Parainfluenza viruses
Also may Mycoplasma pneumoniae

7

Most widely used media for culturing B. pertussis

Regan-Lowe

8

AKA Vincent's angina

Trench mouth

9

2 potential complications of strep pharyngitis

- Scarlet fever
- Rheumatic fever

10

This infection is diagnosed by looking for a fried egg colony formation

Croup (M. pneumoniae)

11

Why no staph streak for eye infection culture set up?

Collection from eyes already a low organism count - may hide organism

12

Bug that smells bleach-like

Eikenella corrodens

13

Best detection method for pertussis?

PCR

14

Infection characterized by disintegration of mucosal membranes and bony ridges of nose

Ozena

15

Specimen of choice for both culture and PCR of pertussis organisms

- Nasopharyngeal aspirate
- NP swab

16

Why are epiglottis diagnoses usually made clinically?

Collection of a specimen at the site can INCREASE THE RISK OF OBSTRUCTION

17

Special media M7 is used for?

Requests for Mycoplasma - croup infections

18

Best specimen to collect for this infection is a blood culture

Epiglottis

19

Organism that causes whooping cough

Bordetella pertussis

20

AKA laryngotracheobronchitis

Croup

21

Infective agents that usually cause stomatitis

Virus
(occasionally bacterial or fungal)

22

Causative agents of trench mouth

Grm negative fusiform anaerobes

Spirochetes

23

Necrotizing, ulcerative gingivitis

Vincent's angina

24

Rapid antigen testing can be performed from this specimen

Throat swab

*culture still performed if negative

25

Used for pertussis culture confirmation

FA stain

26

How does the lab diagnose Vincent's angina?

Examine Gram stained smear of scrapings from the gingiva

27

Sinus infection that usually affects 10-30 yr olds; how it spreads

Rhinoscleroma - direct inhalation of organism

28

Arcanobacterium haemolyticum biochemical identification

Catalase NEG
CAMP reaction inhibited

29

Infection of the mucous membranes of mouth

Staomatitis

30

Small, gram positive rods that may be curved, slightly gram-variable

Arcanobacterium haemolyticum

31

Infection due to this organism causes formation of a grey pseudomembrane

Corynebacterium diptheria

32

Specimen collected to detect N. meningitidis carriage

Throat swab

33

Serious infection of the aqueous or vitreous humor

Endophthalmitis

34

Usual infection due to contact lenses and typical organism

Keratitis - P. aeruginosa

35

Liquid media for eye culture

BHI broth
Blood formulation w/ added Fildes

36

What is blepharitis and typical causative agents

Eyelash follicle infection

S. aureus, herpes, lice (in children)

37

Patients are at risk of this infection if they have a peritonsillar abscess due to Fusobacterium necrophorum

Jugular thrombophlebitis

38

Otitis media empiric treatment

Amoxicillin
SXT if penicillin allergic

39

Specimen collected for S. aureus carrier detection?

Anterior nares

40

4 uncommon bacteria that cause pharyngitis

C. diptheria
C. ulcerans
N. gonorrhoeae
N. meningitidis

41

Primary cause of otitis externa

P. aeruginosa (swimmer's ear)

42

Sinus infection that usually affects elderly; how it spreads

Ozena - colonizer; esp in immunocompromised

43

Nasal passages are commonly colonized with?

CoNS
S. aureus

44

5 bacteria that can cause conjunctivitis

- S. aureus
- H. influenzae
- S. pneumoniae
- M. catarrhalis
- N. gonorrhoeae

45

Infection characterized by slow growing tumour-like nasal obstruction

Rhinoscleroma

46

Most common causative agent of conjunctivitis?

Common cold (adenovirus)

47

Predominant organisms in peritonsillar abscess

Fusobacterium
Bacteroides
Anaerobic cocci

48

Dental carries are due to which organisms?

Viridans
S. mutans

49

Organisms endophthalmitis is associated with

S. aureus
S. pneumoniae
P. aeruginosa
other streptococci
Bacillus cereus

50

Causes of trench mouth

Poor oral hygiene
Poor nutrition
Stress

51

2 sinus infections and causative agent

Rhinoscleroma - Klebsiella rhinoscleromatis

Ozena - Klebsiella ozanae

52

AKA jugular thrombophlebitis

Lemierre's disease (human necrobacillosis)

53

2 special media used to detect Bordetella pertussis

Bordet-Gengou
Regan-Lowe

54

Antibiotic of choice for treatment whooping cough

- Erythromycin

- Newer macrolides (clarithromycin, azithromycin)

55

AKA Quinzy

Peritonsillar abscess

56

AKA endophthalmitis

Vitritis