Comparative efficacies of antibiotics in a rat model of meningoencephalitis due to Listeria monocytogenes

Michelet, C; Leib, Stephen; Bentue-Ferrer, D; Täuber, Martin G. (1999). Comparative efficacies of antibiotics in a rat model of meningoencephalitis due to Listeria monocytogenes. Antimicrobial agents and chemotherapy, 43(7), pp. 1651-1656. Washington, D.C.: American Society for Microbiology

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The antibacterial activities of amoxicillin-gentamicin, trovafloxacin, trimethoprim-sulfamethoxazole (TMP-SMX) and the combination of trovafloxacin with TMP-SMX were compared in a model of meningoencephalitis due to Listeria monocytogenes in infant rats. At 22 h after intracisternal infection, the cerebrospinal fluid was cultured to document meningitis, and the treatment was started. Treatment was instituted for 48 h, and efficacy was evaluated 24 h after administration of the last dose. All tested treatment regimens exhibited significant activities in brain, liver, and blood compared to infected rats receiving saline (P < 0.001). In the brain, amoxicillin plus gentamicin was more active than all of the other regimens, and trovafloxacin was more active than TMP-SMX (bacterial titers of 4.1 +/- 0.5 log10 CFU/ml for amoxicillin-gentamicin, 5.0 +/- 0.4 log10 CFU/ml for trovafloxacin, and 5.8 +/- 0.5 log10 CFU/ml for TMP-SMX; P < 0.05). In liver, amoxicillin-gentamicin and trovafloxacin were similarly active (2.8 +/- 0.8 and 2.7 +/- 0.8 log10 CFU/ml, respectively) but more active than TMP-SMX (4.4 +/- 0. 6 log10 CFU/ml; P < 0.05). The combination of trovafloxacin with TMP-SMX did not alter the antibacterial effect in the brain, but it did reduce the effect of trovafloxacin in the liver. Amoxicillin-gentamicin was the most active therapy in this study, but the activity of trovafloxacin suggests that further studies with this drug for the treatment of Listeria infections may be warranted.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Service Sector > Institute for Infectious Diseases
04 Faculty of Medicine > Faculty Institutions > Teaching Staff, Faculty of Medicine

UniBE Contributor:

Leib, Stephen and Täuber, Martin G.


500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health






American Society for Microbiology




Factscience Import

Date Deposited:

04 Oct 2013 15:00

Last Modified:

30 Jun 2015 14:54

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URI: (FactScience: 60891)

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