Bacterial biofilm in chronic lesions of hidradenitis suppurativa

Hidradenitis suppurativa Research

Author(s): Ring HC, Bay L, Nilsson M, Kallenbach K, Miller IM, Saunte DM, Bjarnsholt T, Tolker-Nielsen T, Jemec GB

BACKGROUND: Chronic nonhealing or recurrent inflammatory lesions, reminiscent of infection but recalcitrant to antibiotic therapy, generally characterize biofilm-driven diseases. Chronic lesions of hidradenitis suppurativa (HS) exhibit several characteristics, which are compatible with well-known biofilm infections.

OBJECTIVES: To determine and quantify the potential presence of bacterial aggregates in chronic HS lesions.

METHODS: In 42 consecutive patients with HS suffering from chronic lesions, biopsies were obtained from lesional as well as from perilesional skin. Samples were investigated using peptide nucleic acid-fluorescence in situ hybridization in combination with confocal laser scanning microscopy. In addition, corresponding histopathological analysis on haematoxylin and eosin slides was performed.

RESULTS: Biofilms were seen in 67% of the samples of chronic lesions and in 75% of the perilesional samples. The mean diameter of aggregates in lesional skin was significantly greater than in perilesional skin (P = 0·01). Large biofilms (aggregates > 50 μm in diameter) were found in 42% of lesional samples and in only 5% of the perilesional samples (P = 0·009). The majority of the large biofilms were situated in sinus tracts (63%) or in the infundibulum (37%). The majority of the sinus tract samples (73%) contained active bacterial cells, which were associated with inflammation.

CONCLUSIONS: This study suggests that biofilm formation is associated with inflammation of chronic HS lesions. The aggregates most likely occur as a secondary event, possibly due to predisposing local anatomical changes such as sinus tracts (tunnels), keratinous detritus and dilated hair follicles.

Dermatology Journal and/or Publisher

Journal Name: The British journal of dermatology
Journal Abbreviation: Br. J. Dermatol.
Journal Date Published: 2016-08-26

National Center for Biotechnology Information

PMID: 27564400
Article Source:
Lasted Revision: 2017-11-05

Abstract Source: National Center for Biotechnology Information, U.S. National Library of Medicine Abstract Query for Hidradenitis suppurativa (HS).


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