Flashcards in 7. Upper Respiratory Deck (56):
Organism that causes whooping cough
Best detection method for pertussis?
Why are epiglottis diagnoses usually made clinically?
Collection of a specimen at the site can INCREASE THE RISK OF OBSTRUCTION
Bug that smells bleach-like
Eikenella corrodens is associated w/ what infection?
Perimandibular space infections
Most common causative agent of conjunctivitis?
Common cold (adenovirus)
Why no staph streak for eye infection culture set up?
Collection from eyes already a low organism count - may hide organism
Infection due to this organism causes formation of a grey pseudomembrane
Rapid antigen testing can be performed from this specimen
*culture still performed if negative
Causative agents of trench mouth
Grm negative fusiform anaerobes
Necrotizing, ulcerative gingivitis
Infection characterized by slow growing tumour-like nasal obstruction
Special media M7 is used for?
Requests for Mycoplasma - croup infections
5 bacteria that can cause conjunctivitis
- S. aureus
- H. influenzae
- S. pneumoniae
- M. catarrhalis
- N. gonorrhoeae
Organisms endophthalmitis is associated with
4 uncommon bacteria that cause pharyngitis
Specimen collected for S. aureus carrier detection?
Usual infection due to contact lenses and typical organism
Keratitis - P. aeruginosa
Primary etiologic agent of croup?
Also may Mycoplasma pneumoniae
2 sinus infections and causative agent
Rhinoscleroma - Klebsiella rhinoscleromatis
Ozena - Klebsiella ozanae
Predominant organisms in peritonsillar abscess
Arcanobacterium haemolyticum biochemical identification
CAMP reaction inhibited
Most widely used media for culturing B. pertussis
Sinus infection that usually affects 10-30 yr olds; how it spreads
Rhinoscleroma - direct inhalation of organism
When are group A/C/G strep reported?
Group A - always, regardless of amount
Groups C/G - only if it' the predominant organism
Infection characterized by disintegration of mucosal membranes and bony ridges of nose
Specimen collected to detect N. meningitidis carriage
Best specimen to collect for this infection is a blood culture
Infection of the mucous membranes of mouth
Antibiotic of choice for treatment whooping cough
- Newer macrolides (clarithromycin, azithromycin)
Otitis media empiric treatment
SXT if penicillin allergic
What is blepharitis and typical causative agents
Eyelash follicle infection
S. aureus, herpes, lice (in children)
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)
Nasal passages are commonly colonized with?
Sinus infection that usually affects elderly; how it spreads
Ozena - colonizer; esp in immunocompromised
Serious infection of the aqueous or vitreous humor
Specimen of choice for both culture and PCR of pertussis organisms
- Nasopharyngeal aspirate
- NP swab
2 special media used to detect Bordetella pertussis
AKA jugular thrombophlebitis
Lemierre's disease (human necrobacillosis)
Liquid media for eye culture
Blood formulation w/ added Fildes
How does the lab diagnose Vincent's angina?
Examine Gram stained smear of scrapings from the gingiva
Primary cause of otitis externa
P. aeruginosa (swimmer's ear)
AKA Vincent's angina
This infection is diagnosed by looking for a fried egg colony formation
Croup (M. pneumoniae)
Infective agents that usually cause stomatitis
(occasionally bacterial or fungal)
Small, gram positive rods that may be curved, slightly gram-variable
Patients are at risk of this infection if they have a peritonsillar abscess due to Fusobacterium necrophorum
2 potential complications of strep pharyngitis
- Scarlet fever
- Rheumatic fever
Media used to detect MRSA
Mannitol salt agar
Causes of trench mouth
Poor oral hygiene
Dental carries are due to which organisms?
Usual organism that causes epiglottis
Haemophilus influenzae type b