How frequently does rheumatic fever complicate tonsillitis and peritonsillar abscess (PTA)?

Updated: Apr 06, 2020
  • Author: Udayan K Shah, MD, FACS, FAAP; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Rheumatic fever follows acute pharyngitis by 2-4 weeks and was observed in up to 3% of streptococcal pharyngitides in the mid-20th century. Today, far fewer persons experience this complication, largely because of appropriate antibiotic therapy. Cardiac valvular vegetations affect the mitral and tricuspid valves, leading to murmurs, persistent relapsing fevers, and valvular stenosis or incompetence. A throat swab does not identify the causative organism, because a positive result may reflect colonization rather than pathogenicity. Elevated or rising titers of antistreptolysin (ASO) antibodies, anti-DNAse beta, or antihyaluronidase are required to make the diagnosis.

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