Journal Article

Moraxella catarrhalis in Acute Laryngitis: Infection or Colonization?

C. Hoi, C. Schalén, C. M. Verduin, E. E. M. Van Dijke, J. Verhoef, A. Fleer and H. Van Dijk

in The Journal of Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 174, issue 3, pages 636-638
Published in print September 1996 | ISSN: 0022-1899
Published online September 1996 | e-ISSN: 1537-6613 | DOI: https://dx.doi.org/10.1093/infdis/174.3.636
Moraxella catarrhalis in Acute Laryngitis: Infection or Colonization?

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The complement phenotypes of Moraxella catarrhalis isolates obtained from adult patients with acute laryngitis were investigated using a microtiter serum bactericidal assay and compared with those of other donor groups. Laryngitis isolates had a higher proportion (57%) of complement-resistant strains than did carrier strains from healthy 8- to 13-year-old schoolchildren (16%). The difference between these groups was statistically significant (χ2 [3 × 2 table] = 21.55; P < .001). The relatively frequent occurrence of the complement-resistant (virulence-associated) phenotype in adults with acute laryngitis supports the theory of an active role of M. catarrhalis in the pathogenesis of acute laryngitis.

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Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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