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Interference by Aerobic and Anaerobic Bacteria in Children With Recurrent Group A -Hemolytic Streptococcal Tonsillitis

Itzhak Brook, MD, MSc; Alan E. Gober, MD

Arch Otolaryngol Head Neck Surg. 1999;125:552-554.

Objective  To compare the frequency of recovery of aerobic and anaerobic bacteria with interfering capability of group A -hemolytic streptococci (GABHS) in the tonsils of children with and without a history of recurrent GABHS pharyngotonsillitis.

Patients and Methods  Tonsillar cultures were taken from a group of 20 children with and 20 without history of recurrent GABHS pharyngotonsillitis.

Results  Eleven aerobic and anaerobic isolates with interfering capability with GABHS were recovered from 6 (30%) of the 20 children with recurrent GABHS, and 40 such organisms were isolated from 17 (85%) of the 20 without recurrences (P<.01). The interfering organisms included aerobic (-hemolytic and nonhemolytic streptococci) and anaerobic organisms (Prevotella and Peptostreptococcus species).

Conclusions  The tonsils of children with a history of recurrent GABHS infection contain fewer aerobic and anaerobic bacteria with interfering capability of GABHS than those without the history of recurrent GABHS infection. The presence of these interfering bacteria may play a role in preventing GABHS infection.

From the Department of Pediatrics, Georgetown University, School of Medicine, Washington, DC.

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