7. Upper Respiratory Flashcards Preview

Clinical Microbiology 2 > 7. Upper Respiratory > Flashcards

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

Organism that causes whooping cough

Bordetella pertussis

2

AKA endophthalmitis

Vitritis

3

Best detection method for pertussis?

PCR

4

Why are epiglottis diagnoses usually made clinically?

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

5

Bug that smells bleach-like

Eikenella corrodens

6

Eikenella corrodens is associated w/ what infection?

Perimandibular space infections

7

Most common causative agent of conjunctivitis?

Common cold (adenovirus)

8

Why no staph streak for eye infection culture set up?

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

9

Infection due to this organism causes formation of a grey pseudomembrane

Corynebacterium diptheria

10

Rapid antigen testing can be performed from this specimen

Throat swab

*culture still performed if negative

11

Causative agents of trench mouth

Grm negative fusiform anaerobes

Spirochetes

12

Necrotizing, ulcerative gingivitis

Vincent's angina

13

Infection characterized by slow growing tumour-like nasal obstruction

Rhinoscleroma

14

Special media M7 is used for?

Requests for Mycoplasma - croup infections

15

5 bacteria that can cause conjunctivitis

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

16

Organisms endophthalmitis is associated with

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

17

4 uncommon bacteria that cause pharyngitis

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

18

Specimen collected for S. aureus carrier detection?

Anterior nares

19

Usual infection due to contact lenses and typical organism

Keratitis - P. aeruginosa

20

Primary etiologic agent of croup?

Parainfluenza viruses
Also may Mycoplasma pneumoniae

21

2 sinus infections and causative agent

Rhinoscleroma - Klebsiella rhinoscleromatis

Ozena - Klebsiella ozanae

22

Predominant organisms in peritonsillar abscess

Fusobacterium
Bacteroides
Anaerobic cocci

23

Arcanobacterium haemolyticum biochemical identification

Catalase NEG
CAMP reaction inhibited

24

Most widely used media for culturing B. pertussis

Regan-Lowe

25

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

Rhinoscleroma - direct inhalation of organism

26

When are group A/C/G strep reported?

Group A - always, regardless of amount

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

27

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

Ozena

28

Specimen collected to detect N. meningitidis carriage

Throat swab

29

Best specimen to collect for this infection is a blood culture

Epiglottis

30

Infection of the mucous membranes of mouth

Stomatitis

31

Antibiotic of choice for treatment whooping cough

- Erythromycin

- Newer macrolides (clarithromycin, azithromycin)

32

AKA laryngotracheobronchitis

Croup

33

Otitis media empiric treatment

Amoxicillin
SXT if penicillin allergic

34

What is blepharitis and typical causative agents

Eyelash follicle infection

S. aureus, herpes, lice (in children)

35

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)

36

Nasal passages are commonly colonized with?

CoNS
S. aureus

37

Sinus infection that usually affects elderly; how it spreads

Ozena - colonizer; esp in immunocompromised

38

Serious infection of the aqueous or vitreous humor

Endophthalmitis

39

Specimen of choice for both culture and PCR of pertussis organisms

- Nasopharyngeal aspirate
- NP swab

40

2 special media used to detect Bordetella pertussis

Bordet-Gengou
Regan-Lowe

41

AKA jugular thrombophlebitis

Lemierre's disease (human necrobacillosis)

42

AKA Quinzy

Peritonsillar abscess

43

Liquid media for eye culture

BHI broth
Blood formulation w/ added Fildes

44

How does the lab diagnose Vincent's angina?

Examine Gram stained smear of scrapings from the gingiva

45

Primary cause of otitis externa

P. aeruginosa (swimmer's ear)

46

AKA Vincent's angina

Trench mouth

47

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

Croup (M. pneumoniae)

48

Infective agents that usually cause stomatitis

Virus
(occasionally bacterial or fungal)

49

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

Arcanobacterium haemolyticum

50

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

Jugular thrombophlebitis

51

2 potential complications of strep pharyngitis

- Scarlet fever
- Rheumatic fever

52

Media used to detect MRSA

Mannitol salt agar
Chromagar

53

Causes of trench mouth

Poor oral hygiene
Poor nutrition
Stress

54

Dental carries are due to which organisms?

Viridans
S. mutans

55

Usual organism that causes epiglottis

Haemophilus influenzae type b

56

Used for pertussis culture confirmation

FA stain