Abstract
Secnidazole, a 5-nitroimidazole with a longer half-life, is structurally related to metronidazole and tinidazole. For treatment of bacterial vaginosis (BV), secnidazole is a suitable single-dose oral drug having a longer serum half-life than metronidazole. The objective of this study was to evaluate the antimicrobial susceptibility of vaginal isolates of facultative and anaerobic bacteria to secnidazole, metronidazole, tinidazole and clindamycin. A total of 605 unique BV-related bacteria and 108 isolates of lactobacilli recovered from the human vagina of US women during the years 2009-2015 were tested for antimicrobial susceptibility by the agar dilution CLSI reference method to determine the minimal inhibitory concentration (MIC). The MIC90 (μg/mL) for secnidazole was similar to metronidazole and tinidazole for Anaerococcus tetradius (secnidazole: MIC90 2; metronidazole: MIC90 2; tinidazole: MIC90 4), Atopobium vaginae (32; >128; 128), Bacteroides species (2; 2; 2), Finegoldia magna (2; 2; 4), Gardnerella vaginalis (128; 64; 32), Mageeibacillus indolicus (2; 2; 2), Megasphaera-like bacteria (0.5; 0.25; 0.5), Mobiluncus curtisii (128; >128; >128) and Mobiluncus mulieris (>128; >128; >128), Peptoniphilus lacrimalis (4; 4; 4) and...Continue Reading
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