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The role of bacterial interference in otitis, sinusitis and tonsillitis.
Otolaryngol Head Neck Surg
July 2005
Department of Pediatrics, Georgetown University, USA.
Bacterial interactions that include antagonism (interference) and synergism help maintain balance between the members of the normal endogenous flora. Alpha-streptococci that predominate in the normal respiratory tract flora attracted most attention in studies of bacterial interference. Other organisms that possess interfering characteristics in upper respiratory tract infections (URTIs) are nonhemolytic streptococci, and Prevotella and Peptostreptococcus spp.
View Article and Find Full Text PDFThe Use of Probiotics in Head and Neck Infections.
Curr Infect Dis Rep
June 2002
ENT Department, Lundby Hospital, Wieselgrensplatesen 2A, 41717 Göteborg, Sweden.
Recurrent episodes of infections in the upper respiratory tract are very common. The pathogenesis behind these recurrences is still not well understood, but much attention has been paid to the adherence of the microorganisms to epithelial structures and to the protective function of the normal bacterial flora (bacterial interference). Thus, in vitro as well as in vivo studies have shown that both aerobic and anaerobic bacteria of the normal flora in the upper respiratory tract can hinder the growth of pathogens and the establishment of a renewed infection.
View Article and Find Full Text PDFEffect of recolonisation with "interfering" alpha streptococci on recurrences of acute and secretory otitis media in children: randomised placebo controlled trial.
BMJ
January 2001
Ear, Nose, and Throat Department, Lundby Hospital, 41717 Gothenburg, Sweden.
Objective: To study the effect of recolonisation with alpha streptococci with the ability to inhibit the growth of otopathogens ("interfering" activity) on the recurrence of acute otitis media in susceptible children and the effect on the frequency of secretory otitis media.
Design: Double blind, randomised, placebo controlled study.
Setting: Ear, nose, and throat clinic with three doctors.
A total of 342 patients with clinical signs of tonsillitis and suspected group A beta-haemolytic streptococci (GAS) aetiology, verified with rapid test and GAS culture, were enrolled in a randomized, placebo-controlled, double-blind, multicentre study. They received antibiotic treatment for 10 days, followed by 10 days of alpha-streptococcal or placebo spray treatment in the ratio of 2 : 1. Pharyngeal status, throat culture and adverse events were investigated up to 75 days after treatment.
View Article and Find Full Text PDFPerianal streptococcal dermatitis. The possible protective role of alpha-streptococci against spread and recurrence of group A streptococcal throat infection.
Scand J Prim Health Care
March 1999
Department of ENT, Lundby Hospital, Göteborg, Sweden.
Objective: To follow the spread of beta-haemolytic streptococci group A (GAS) within a family and examine the protective activity of normally occurring alpha-streptococci against GAS tonsillitis.
Design: Follow up of recurrent GAS throat infection within a family.
Setting: Intra familial spread of GAS.
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