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Evidence of an intracellular reservoir in the nasal mucosa of patients with recurrent Staphylococcus aureus rhinosinusitis

Huggler, Elzbieta
Kampf, Sandy
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Published in The Journal of Infectious Diseases. 2005, vol. 192, no. 6, p. 1023-1028
Abstract Severe infections due to Staphylococcus aureus require prolonged therapy for cure, and relapse may occur even years after the first episode. Persistence of S. aureus may be explained, in part, by nasal carriage of S. aureus, which occurs in a large percentage of healthy humans and represents a major source of systemic infection. However, the persistence of internalized S. aureus within mucosal cells has not been evaluated in humans. Here, we provide the first in vivo evidence of intracellular reservoirs of S. aureus in humans, which were assessed in endonasal mucosa specimens from patients suffering from recurrent S. aureus rhinosinusitis due to unique, patient-specific bacterial clonotypes. Heavily infected foci of intracellular bacteria located in nasal epithelium, glandular, and myofibroblastic cells were revealed by inverted confocal laser scan fluorescence and electron microscopic examination of posttherapy intranasal biopsy specimens from symptom-free patients undergoing surgery on the sinuses. Intracellular residence may provide a sanctuary for pathogenic bacteria by protecting them from host defense mechanisms and antibiotic treatment during acute, recurrent S. aureus rhinosinusitis.
Keywords BiopsyCarrier StateEpithelium/microbiologyFibroblasts/microbiologyHumansMicroscopy, ConfocalMicroscopy, ElectronNasal Mucosa/ microbiology/pathologyRecurrenceRhinitis/ microbiology/pathologySinusitis/ microbiology/pathologyStaphylococcal Infections/ microbiology/pathologyStaphylococcus aureus/ isolation & purification
PMID: 16107955
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CLEMENT, Sophie et al. Evidence of an intracellular reservoir in the nasal mucosa of patients with recurrent Staphylococcus aureus rhinosinusitis. In: The Journal of Infectious Diseases, 2005, vol. 192, n° 6, p. 1023-1028. doi: 10.1086/432735 https://archive-ouverte.unige.ch/unige:7147

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Deposited on : 2010-06-21

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