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  • Title: In vivo efficacy of doripenem (DRPM) against Pseudomonas aeruginosa in murine chronic respiratory tract infection model.
    Author: Araki N, Yanagihara K, Morinaga Y, Yamada K, Yamada Y, Kohno S, Kamihira S.
    Journal: J Infect Chemother; 2011 Jun; 17(3):318-21. PubMed ID: 20972597.
    Abstract:
    Doripenem is a carbapenem antibiotic with broad-spectrum coverage of gram-positive and gram-negative bacteria, including Pseudomonas aeruginosa, and is considered to be as effective as meropenem. The in vivo activity of doripenem was thus compared with that of meropenem in a chronic lower respiratory P. aeruginosa infection mouse model. The number of viable bacteria in the lungs of mice after treatment with doripenem, meropenem, and saline was 2.01 ± 0.69, 2.03 ± 0.48, and 3.90 ± 1.40 log₁₀ CFU/lung, respectively. The number of viable bacteria in the lungs of mice treated with doripenem and meropenem was significantly lower than that in lungs of controls. Histopathological examination of lung specimens from the control group revealed promotion of the inflammatory response in chronic bronchial infection. However, the groups treated with doripenem and meropenem showed weaker inflammatory responses. These results suggest that doripenem treatment is effective against chronic airway infection with P. aeruginosa.
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