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Research ArticleOriginal Article
Open Access

Isolation of Moraxella catarrhalis in patients at King Khalid University Hospital, Riyadh

Hanan A. Babay
Saudi Medical Journal September 2000, 21 (9) 860-863;
Hanan A. Babay
Dept. of Pathology/Microbiology, College of Medicine, King Khalid University Hospital, PO Box 2925, Riyadh 11461, Kingdom of Saudi Arabia. Tel. +966 (1) 467 2457 Fax. +966 (1) 467 2462. E-mail: [email protected]
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Abstract

OBJECTIVE: A retrospective study was carried out to assess the clinical significance of Moraxella catarrhalis (M. catarrhalis) isolated from 32 specimens received from patients seen during a 2 year period.

METHODS: The identity of isolates was confirmed by DNAse production and reduction of nitrate to nitrite. Susceptibility testing and B-lactamase production was carried out for each isolate.

RESULTS: Twenty three of the patients were adults and 9 were children. Twelve (37%) of the isolates were from the sputum of patients aged more than 50 years with a clinical diagnosis of pneumonia, bronchitis or bronchiactesis. Six (18%) had M. catarrhalis isolated from sputum and had underlying cardiac, liver diseases or diabetes mellitus. The organism was isolated from the blood of one patient with pneumonia and one with leukaemia. It was also isolated from patients with sinusitis, conjunctivitis or otitis media. Twenty seven (84%) of the 32 strains produced B-lactamase, resistance to erythromycin and clindamycin was detected in 13% of the isolates. All isolates were susceptible to ciprofloxacin, tetracycline, trimethoprim-sulfamethoxazle, gentamicin, chloramphenicol, polymyxin B and neomycin.

CONCLUSION: This study showed that M. catarrhalis can be an important respiratory tract pathogen in adults and children, able to invade the blood stream of patients with predisposing respiratory conditions and underlying systemic illnesses, as well as immunocompetent patients. Since most strains produce B-lactamase, antibiotic therapy should be guided by in-vitro susceptibility tests.

  • Copyright: © Saudi Medical Journal

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Saudi Medical Journal: 21 (9)
Saudi Medical Journal
Vol. 21, Issue 9
1 Sep 2000
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Isolation of Moraxella catarrhalis in patients at King Khalid University Hospital, Riyadh
Hanan A. Babay
Saudi Medical Journal Sep 2000, 21 (9) 860-863;

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Isolation of Moraxella catarrhalis in patients at King Khalid University Hospital, Riyadh
Hanan A. Babay
Saudi Medical Journal Sep 2000, 21 (9) 860-863;
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© 2025 Saudi Medical Journal Saudi Medical Journal is copyright under the Berne Convention and the International Copyright Convention.  Saudi Medical Journal is an Open Access journal and articles published are distributed under the terms of the Creative Commons Attribution-NonCommercial License (CC BY-NC). Readers may copy, distribute, and display the work for non-commercial purposes with the proper citation of the original work. Electronic ISSN 1658-3175. Print ISSN 0379-5284.

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