Flashcards in Small Group 2 - Bacterial Respiratory Infections 1 Deck (6):
2 most prevalent causative organisms
4 predisposing factors
When are cultures done?
Caused by Strep pneumonia and Haemophilus influenzae
Factors: impaired mucociliary function, obstruction, immune deficiency, and local insult.
Associated w/ allergies (may cause obstruction)
Cultures NOT done for acute b/c a hole would need to be punctured to access the sinus. Culture is done for chronic sinusitis though.
Acute Otitis Media
2 most prevalent causes
Caused by Strep pneumoniae and Haemophilus influenza
Complications - hearing loss, facial nerve palsy, tympanic membrane rupture, tympanosclerosis, and mastoiditis.
Often clears on own. Wait 48 hrs before prescription is filled if px is > 2 y/o.
Middle Ear Effusion
Occurs after AOM
Serous fluid builds up due to blocked Eustachian tube.
No eardrum inflammation. Infection is long gone.
Wait 8-12 weeks. If still present, consider inserting tubes.
Signs / sxs
Virulence factors of main organism
Signs / sxs - Redness / swelling of external ear canal. May cause pain, itching, or yellow discharge.
Mainly caused by Pseudomonas aeruginosa. Sometimes Staph aureus.
Pseudomonas virulence factors - adhesins and exotoxins.
Malignant otitis externa
Most common in diabetics, elderly, and immunocompromised
Sxs include tissue destruction, hearing loss, or intracranial spread
Diagnose w/ culture and radiology
Tx w/ AB and debridement