Poststreptococcal Reactive Arthritis in Children

Poststreptococcal reactive arthritis (PSRA) in children is an acute, nonsuppurative arthritis following documented streptococcal infections. Although most authors accepted it as a different entity, the differences from acute rheumatic fever (ARF) are not clear. To document and compare the clinical and laboratory characteristics of PSRA and ARF, 24 patients with PSRA and 20 with ARF were enrolled in the study.

The latency period from upper respiratory tract infection was shorter in patients with PSRA ( P<0.01). However, 25% of the patients with ARF had also short (<10 days) latency periods. Although symmetric and nonmigratory arthritis were more frequent in patients with PSRA, there was no significant difference for the distribution of mono-, oligo-, and polyarticular disease between PSRA and ARF patients. The frequency of small joint and hip involvement was also similar between the patient groups. Unresponsiveness of articular symptoms to salicylate therapy within 72 h was more frequent in patients with PSRA (P<0.001).

However, in a substantial part of the patients with ARF (nine patients, 45%), joint symptoms also had no response during the first 72 h. Since there is a considerable overlap of symptoms, signs, and laboratory features of PSRA and ARF, a line between these two entities could not be easily drawn. We conclude that these two conditions are actually different presentations of the same disease.

A retrospective chart review was performed of all patients seen in a pediatric rheumatology clinic from January, 1990 to December, 1992. Four patients were identified with poststreptococcal reactive arthritis (PSReA) and no carditis. Their arthritis had an acute onset, tended to have a longer duration than the arthritis typically seen in ARF, and in most instances did not respond promptly to therapy with aspirin or nonsteroidal antiinflammatory agents. In some patients, there was no history of sore throat or fever. Diagnosis of PSReA was made by serologic testing. Cardiac evaluation in all 4 patients was negative.

PSReA should be considered in the differential diagnosis for any pediatric patient with the acute onset of arthritis, whether the arthritis is the classic migratory polyarthritis typically seen in ARF or not. Throat culture and serologic testing for streptococcal infection should be performed on these patients. If recent GABHS infection is confirmed, cardiac evaluation, including echocardiogram, is warranted.

Both ARF and PSReA occur after GABHS infection, but the precise relationship between these 2 entities is unclear. Longterm follow up of pediatric patients with PSReA in previous reports have shown that a certain percentage of them upon subsequent GABHS infection develop carditis. Until the specific risk factors (either host or bacterial characteristics) for developing subsequent carditis are better delineated, antibiotic prophylaxis similar to that used in ARF should be considered in patients with PSReA.

Source: ncbi.nlm.nih.gov