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Quantitative analysis of the cellular inflammatory response against biofilm bacteria in chronic wounds
Author(s) -
Fazli Mustafa,
Bjarnsholt Thomas,
KirketerpMøller Klaus,
Jørgensen Anne,
Andersen Claus Bøgelund,
Givskov Michael,
TolkerNielsen Tim
Publication year - 2011
Publication title -
wound repair and regeneration
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.847
H-Index - 109
eISSN - 1524-475X
pISSN - 1067-1927
DOI - 10.1111/j.1524-475x.2011.00681.x
Subject(s) - biofilm , pseudomonas aeruginosa , microbiology and biotechnology , staphylococcus aureus , bacteria , wound healing , inflammation , chronic wound , biology , pathology , medicine , immunology , genetics
Chronic wounds are an important problem worldwide. These wounds are characterized by a persistent inflammatory stage associated with excessive accumulation and elevated cell activity of neutrophils, suggesting that there must be a persistent stimulus that attracts and recruits neutrophils to the wound. One such stimulus might be the presence of bacterial biofilms in chronic wounds. In the present study, biopsy specimens from chronic venous leg ulcers were investigated for the detection of bacteria using peptide nucleic acid‐based fluorescence in situ hybridization (PNA‐FISH) and confocal laser scanning microscopy. The bacteria in the wounds were often situated in large aggregates. To obtain a measure of the cellular inflammatory response against the bacteria in the chronic wounds, the amount of neutrophils accumulated at the site of infection was evaluated through differential neutrophil counting on the tissue sections from wounds containing either Pseudomonas aeruginosa or Staphylococcus aureus . The P. aeruginosa ‐containing wounds had significantly higher numbers of neutrophils accumulated compared with the S. aureus ‐containing wounds. These results are discussed in relation to the hypothesis that the presence of P. aeruginosa biofilms in chronic wounds may be one of the main factors leading to a persistent inflammatory response and impaired wound healing.