A prospective study of intrafamilial transmission and antimicrobial susceptibility of Moraxella catarrhalis |
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Authors: | Masaki Hironori Qin Liang Zhou Zhaoyan Onizuka Tomoko Watanabe Kiwao Hu Bijie Watanabe Hiroshi |
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Affiliation: | Department of Internal Medicine, Tagami Hospital, Nagasaki, Japan. |
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Abstract: | Moraxella catarrhalis has been recognized as a particularly threatening respiratory tract pathogen in humans. A prospective study was performed to investigate which strains of M. catarrhalis can be transmitted within families; the study also addressed features of antimicrobial susceptibility. Seventy-five strains were isolated from six participants between July 2002 and February 2004, including 73 that were verified as beta-lactamase-producing strains. Antimicrobial susceptibility was tested for six types of antibiotics and no treatment issues were found. Pulsed-field gel electrophoresis (PFGE) was performed on all strains and 25 independent PFGE patterns were detected. The dominant pattern L (defined in the present study) was found in 21 (28%) of strains that were continuously recovered from children from the same family over an 8-month period. Strains with the patterns G, J, L, M, R, S, U, and W seemed to spread among the children, but there was no evidence of child-parent transmission. In the present study, the characteristics of M. catarrhalis within families have been documented, and PFGE profiles found to reveal alternating colonization and intrafamilial transmission. |
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Keywords: | antimicrobial susceptibility intrafamilial transmission Moraxella catarrhalis pulsed‐field gel electrophoresis |
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