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Chemotherapy

In vitro and in vivo antibacterial activities of Q-35, a novel fluoroquinolone.


PMID 7758353

Abstract

Q-35, a new fluoroquinolone, was evaluated for its in vitro and in vivo antibacterial activities. In vitro antibacterial activity against gram-positive bacteria was almost equal to that of sparfloxacin or tosufloxacin, but its activity against gram-negative bacteria was 2 times or more lower than that of other quinolones tested. In experimental septicemia, the in vivo activity of Q-35 reflected its in vitro antibacterial activity. In respiratory tract infections with Streptococcus pneumoniae TMS-3 in mice, Q-35 showed a therapeutic effect similar to sparfloxacin and tosufloxacin. Q-35 showed almost the same activity as that of ofloxacin in mice with pyelonephritic infection due to Escherichia coli TMS-3. The peak levels of Q-35 in murine serum, lungs and kidneys after a single oral administration were intermediate compared to those of tested quinolones.

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