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Adenoid Reservoir for Pathogenic Biofilm Bacteria
Journal article   Open access   Peer reviewed

Adenoid Reservoir for Pathogenic Biofilm Bacteria

L. Nistico, R. Kreft, A. Gieseke, J. M. Coticchia, A. Burrows, P. Khampang, Y. Liu, J. E. Kerschner, J. C. Post, S. Lonergan, …
Journal of clinical microbiology, v 49(4), pp 1411-1420
01 Apr 2011
DOI: https://doi.org/10.1128/JCM.00756-10
PMID: 21307211
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://doi.org/10.1128/jcm.00756-10View
Published, Version of Record (VoR)Open Access (License Unspecified),  Open

Abstract

Bacteriology
Biofilms of pathogenic bacteria are present on the middle ear mucosa of children with chronic otitis media (COM) and may contribute to the persistence of pathogens and the recalcitrance of COM to antibiotic treatment. Controlled studies indicate that adenoidectomy is effective in the treatment of COM, suggesting that the adenoids may act as a reservoir for COM pathogens. To investigate the bacterial community in the adenoid, samples were obtained from 35 children undergoing adenoidectomy for chronic OM or obstructive sleep apnea. We used a novel, culture-independent molecular diagnostic methodology, followed by confocal microscopy, to investigate the in situ distribution and organization of pathogens in the adenoids to determine whether pathogenic bacteria exhibited criteria characteristic of biofilms. The Ibis T5000 Universal Biosensor System was used to interrogate the extent of the microbial diversity within adenoid biopsy specimens. Using a suite of 16 broad-range bacterial primers, we demonstrated that adenoids from both diagnostic groups were colonized with polymicrobial biofilms. Haemophilus influenzae was present in more adenoids from the COM group ( P = 0.005), but there was no significant difference between the two patient groups for Streptococcus pneumoniae or Staphylococcus aureus . Fluorescence in situ hybridization, lectin binding, and the use of antibodies specific for host epithelial cells demonstrated that pathogens were aggregated, surrounded by a carbohydrate matrix, and localized on and within the epithelial cell surface, which is consistent with criteria for bacterial biofilms.

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Collaboration types
Industry collaboration
Domestic collaboration
International collaboration
Web of Science research areas
Microbiology
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