Anti-multidrug-resistant Acinetobacter baumannii activity of DS-8587: In vitro activity and in vivo efficacy in a murine calf muscle infection model.

DS-8587 is a novel broad-spectrum fluoroquinolone with extended antimicrobial activity against both Gram-positive and Gram-negative pathogens. In this study, we evaluated the in vitro and in vivo antibacterial activity of DS-8587 against multidrug-resistant (MDR) Acinetobacter baumannii. The MIC range of DS-8587 against MDR A.

[Bactericidal effect of levofloxacin injection in combination with meropenem against Pseudomonas aeruginosa using an in vitro simulation model with a hollow fiber system].

An in vitro human plasma concentration simulation model with a hollow fiber system was established and used to evaluate the bactericidal effect of levofloxacin (LVFX) 500mg q.d. in combination with meropenem (MEPM) 1000mg t.

[Therapeutic efficacy of levofloxacin against a model of replicable Legionella pneumophila lung infection in DBA/2 mice].

The in vitro and in vivo antibacterial activities of levofloxacin (LVFX), a quinolone antibacterial, against clinically isolated Legionella pneumophila were investigated in comparison with those of existing antimicrobial agents approved for legionnaires disease. The minimum inhibitory concentrations (MICs) of the agents against 42 strains of L. pneumophila isolated in Japan were determined using agar dilution methods with buffered starch yeast extract agar.

[Novel model of replicative Legionella pneumophila lung infection in DBA/2 mice].

We present here a new model of Legionella pneumophila lung infection in DBA/2 mice. By intranasal inoculation with 106 colony-forming units of L. pneumophila strain suzuki serogoup 1, persistent non-lethal lung infection was established as reflected by the detection of more than 10(4) CFU/lung of the organism 14 days after infection.

In vitro and in vivo antibacterial activities of DC-159a, a new fluoroquinolone.

DC-159a is a new 8-methoxy fluoroquinolone that possesses a broad spectrum of antibacterial activity, with extended activity against gram-positive pathogens, especially streptococci and staphylococci from patients with community-acquired infections. DC-159a showed activity against Streptococcus spp. (MIC(90), 0.