Oropharyngeal Infections

Oropharyngeal Infections
Jonathan Pirie
Introduction
  • Most infections are viral but need to consider other causes
  • Strep throat uncommon in children < 2 years age
  • Consider infectious mononucleosis in older children, but may also present in young children
Pharyngitis
  • Acute pharyngitis can be caused by numerous viral and bacterial agents
  • Viruses predominate, while group A streptococcus is the predominant bacterial cause
  • Chlamydia trachomatis and Mycoplasma pneumoniae may be responsible for pharyngitis in adolescence
  • Candida may present in infants, immunosuppressed children, and children taking antibiotics
Clinical Presentation
  • Coryza, hoarseness, cough, diarrhea, conjunctivitis, anterior stomatitis, and discrete ulcerative lesions suggest a viral etiology
  • Epstein-Barr virus and cytomegalovirus typically have pharyngeal inflammation, diffuse lymphadenopathy, and hepatosplenomegaly
  • Streptococcal pharyngitis typically has an abrupt onset, fever, sore throat, ± headache, vomiting, abdominal pain, and a scarlatiniform rash
  • Other clinical findings: tonsillopharyngeal erythema ± tonsillar exudates, tender cervical adenopathy, a beefy red swollen uvula, petechiae of the palate, and excoriated nares in infants
Investigations
  • Throat culture remains the gold standard for streptococcus
  • Decision to obtain a throat swab should be based on age, signs and symptoms, season, and family and community epidemiology
  • Clinical decision rules have been used but poor positive predictive value
  • Rapid streptococcus by latex agglutination or immunoassay is useful if positive but does not rule out streptococcal infection
  • Obtain CBC, EBV titres, monospot and other bacterial isolates (Chlamydia, N. gonorrhoeae, Mycoplasma) on a case-by-case basis
  • Monospot commonly negative in children < 5 years; may need EBV serology
Management
  • Penicillin is the drug of choice for treatment of acute streptococcal pharyngitis
  • 10-day course recommended for maximal eradication of group A streptococci
  • Treatment should be reserved until positive throat culture or rapid strep test
  • Penicillin, amoxicillin, and erythromycin are equally effective whether divided bid, tid, or qid when used for 10 days
  • Other antibiotics (azithromycin, cefixime, cefuroxime axetil) have been shown to be equally effective when used for shorter duration (≤ 5 days)
    • Should not be routinely used as first-line therapy because of limited studies or concerns regarding broad spectrum of antimicrobial activity
Complications
Jun 22, 2016 | Posted by in EMERGENCY MEDICINE | Comments Off on Oropharyngeal Infections

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