Heiniger, Nadja; Spaniol, Violeta; Troller, Rolf; Vischer, Mattheus; Aebi, Christoph (2007). A reservoir of Moraxella catarrhalis in human pharyngeal lymphoid tissue. Journal of infectious diseases, 196(7), pp. 1080-7. Cary, N.C.: The University of Chicago Press 10.1086/521194
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BACKGROUND: Early exposure of infants and long-term immunity suggest that colonization with Moraxella catarrhalis is more frequent than is determined by routine culture. We characterized a reservoir of M. catarrhalis in pharyngeal lymphoid tissue. METHODS: Tissue from 40 patients (median age, 7.1 years) undergoing elective tonsillectomy and/or adenoidectomy was analyzed for the presence of M. catarrhalis by culture, real-time DNA and RNA polymerase chain reaction (PCR), immunohistochemical analysis (IHC), and fluorescent in situ hybridization (FISH). Histologic sections were double stained for M. catarrhalis and immune cell markers, to characterize the tissue distribution of the organism. Intracellular bacteria were identified using confocal laser scanning microscopy (CLSM). RESULTS: Twenty-nine (91%) of 32 adenoids and 17 (85%) of 20 tonsils were colonized with M. catarrhalis. Detection rates for culture, DNA PCR, RNA PCR, IHC, and FISH were 7 (13%) of 52, 10 (19%) of 52, 21 (41%) of 51, 30 (61%) of 49, and 42 (88%) of 48, respectively (P<.001). Histologic analysis identified M. catarrhalis in crypts, intraepithelially, subepithelially, and (using CLSM) intracellularly. M. catarrhalis colocalized with macrophages and B cells in lymphoid follicles. CONCLUSIONS: Colonization by M. catarrhalis is more frequent than is determined by surface culture, because the organism resides both within and beneath the epithelium and invades host cells.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT) 04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine |
UniBE Contributor: |
Vischer, Mattheus, Aebi, Christoph |
ISSN: |
0022-1899 |
ISBN: |
17763332 |
Publisher: |
The University of Chicago Press |
Language: |
English |
Submitter: |
Anette van Dorland |
Date Deposited: |
04 Oct 2013 14:55 |
Last Modified: |
05 Dec 2022 14:17 |
Publisher DOI: |
10.1086/521194 |
PubMed ID: |
17763332 |
Web of Science ID: |
000249572500021 |
BORIS DOI: |
10.7892/boris.23376 |
URI: |
https://boris.unibe.ch/id/eprint/23376 (FactScience: 41652) |
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