7. Upper Respiratory

Question 1

Organism that causes whooping cough

Answer 1

Bordetella pertussis

Question 2

AKA endophthalmitis

Answer 2

Vitritis

Question 3

Best detection method for pertussis?

Answer 3

PCR

Question 4

Why are epiglottis diagnoses usually made clinically?

Answer 4

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

Question 5

Bug that smells bleach-like

Answer 5

Eikenella corrodens

Question 6

Eikenella corrodens is associated w/ what infection?

Answer 6

Perimandibular space infections

Question 7

Most common causative agent of conjunctivitis?

Answer 7

Common cold (adenovirus)

Question 8

Why no staph streak for eye infection culture set up?

Answer 8

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

Question 9

Infection due to this organism causes formation of a grey pseudomembrane

Answer 9

Corynebacterium diptheria

Question 10

Rapid antigen testing can be performed from this specimen

Answer 10

Throat swab

*culture still performed if negative

Question 11

Causative agents of trench mouth

Answer 11

Grm negative fusiform anaerobes

Spirochetes

Question 12

Necrotizing, ulcerative gingivitis

Answer 12

Vincent’s angina

Question 13

Infection characterized by slow growing tumour-like nasal obstruction

Answer 13

Rhinoscleroma

Question 14

Special media M7 is used for?

Answer 14

Requests for Mycoplasma - croup infections

Question 15

5 bacteria that can cause conjunctivitis

Answer 15

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

Question 16

Organisms endophthalmitis is associated with

Answer 16

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

Question 17

4 uncommon bacteria that cause pharyngitis

Answer 17

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

Question 18

Specimen collected for S. aureus carrier detection?

Answer 18

Anterior nares

Question 19

Usual infection due to contact lenses and typical organism

Answer 19

Keratitis - P. aeruginosa

Question 20

Primary etiologic agent of croup?

Answer 20

Parainfluenza viruses

Also may Mycoplasma pneumoniae

Question 21

2 sinus infections and causative agent

Answer 21

Rhinoscleroma - Klebsiella rhinoscleromatis

Ozena - Klebsiella ozanae

Question 22

Predominant organisms in peritonsillar abscess

Answer 22

Fusobacterium
Bacteroides
Anaerobic cocci

Question 23

Arcanobacterium haemolyticum biochemical identification

Answer 23

Catalase NEG

CAMP reaction inhibited

Question 24

Most widely used media for culturing B. pertussis

Answer 24

Regan-Lowe

Question 25

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

Answer 25

Rhinoscleroma - direct inhalation of organism

Question 26

When are group A/C/G strep reported?

Answer 26

Group A - always, regardless of amount Groups C/G - only if it' the predominant organism

Question 27

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

Answer 27

Ozena

Question 28

Specimen collected to detect N. meningitidis carriage

Answer 28

Throat swab

Question 29

Best specimen to collect for this infection is a blood culture

Answer 29

Epiglottis

Question 30

Infection of the mucous membranes of mouth

Answer 30

Stomatitis

Question 31

Antibiotic of choice for treatment whooping cough

Answer 31

- Erythromycin | - Newer macrolides (clarithromycin, azithromycin)

Question 32

AKA laryngotracheobronchitis

Answer 32

Croup

Question 33

Otitis media empiric treatment

Answer 33

Amoxicillin | SXT if penicillin allergic

Question 34

What is blepharitis and typical causative agents

Answer 34

Eyelash follicle infection S. aureus, herpes, lice (in children)

Question 35

How to get a true middle ear specimen?

Answer 35

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

Question 36

Nasal passages are commonly colonized with?

Answer 36

CoNS | S. aureus

Question 37

Sinus infection that usually affects elderly; how it spreads

Answer 37

Ozena - colonizer; esp in immunocompromised

Question 38

Serious infection of the aqueous or vitreous humor

Answer 38

Endophthalmitis

Question 39

Specimen of choice for both culture and PCR of pertussis organisms

Answer 39

- Nasopharyngeal aspirate | - NP swab

Question 40

2 special media used to detect Bordetella pertussis

Answer 40

Bordet-Gengou | Regan-Lowe

Question 41

AKA jugular thrombophlebitis

Answer 41

Lemierre's disease (human necrobacillosis)

Question 42

AKA Quinzy

Answer 42

Peritonsillar abscess

Question 43

Liquid media for eye culture

Answer 43

BHI broth | Blood formulation w/ added Fildes

Question 44

How does the lab diagnose Vincent's angina?

Answer 44

Examine Gram stained smear of scrapings from the gingiva

Question 45

Primary cause of otitis externa

Answer 45

P. aeruginosa (swimmer's ear)

Question 46

AKA Vincent's angina

Answer 46

Trench mouth

Question 47

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

Answer 47

Croup (M. pneumoniae)

Question 48

Infective agents that usually cause stomatitis

Answer 48

Virus | occasionally bacterial or fungal

Question 49

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

Answer 49

Arcanobacterium haemolyticum

Question 50

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

Answer 50

Jugular thrombophlebitis

Question 51

2 potential complications of strep pharyngitis

Answer 51

- Scarlet fever | - Rheumatic fever

Question 52

Media used to detect MRSA

Answer 52

Mannitol salt agar | Chromagar

Question 53

Causes of trench mouth

Answer 53

Poor oral hygiene Poor nutrition Stress

Question 54

Dental carries are due to which organisms?

Answer 54

Viridans | S. mutans

Question 55

Usual organism that causes epiglottis

Answer 55

Haemophilus influenzae type b

Question 56

Used for pertussis culture confirmation

Answer 56

FA stain