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Article |

Branhamella catarrhalis as a Lower Respiratory Tract Pathogen in Patients With Chronic Lung Disease

Brooke Nicotra, MD; Manuel Rivera, MD; J. Ileice Luman, MT(ASCP); Richard J. Wallace Jr, MD
Arch Intern Med. 1986;146(5):890-893. doi:10.1001/archinte.1986.00360170090015.
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• To determine the possible role of Branhamella (formerly Neisseria) catarrhalis as a respiratory pathogen, we screened quality sputa (defined by cellular criteria) that showed numerous gram-negative cocci on Gram's stain for the presence of B catarrhalis. In an eight-month period, 52 isolates of B catarrhalis were identified in adults attending a hospital for chest diseases. During this period B catarrhalis was the third most common potential pathogen isolated from sputa. Twenty-two patients (42%) had associated patchy bronchopneumonic or lobar infiltrates. All had negative blood cultures and a generally mild clinical course. The majority of strains (73%) of B catarrhalis produced β-lactamase and were resistant to penicillin and ampicillin. Isolates (including β-lactamase-producing strains) were susceptible to erythromycin, tetracycline, and trimethoprim-sulfamethoxazole. These studies demonstrate that in patients with chronic lung disease, the presence of B catarrhalis in sputum can be suspected on the basis of a Gram's stain and may be associated with the development of new pneumonic infiltrates. Since these organisms frequently produce β-lactamase, empiric antimicrobial therapy should include agents other than the penicillins.

(Arch Intern Med 1986;146:890-893)


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