ArticleAntimicrobial agents and chemotherapy2013
Comparative in vitro activities of SMT19969, a new antimicrobial agent, against Clostridium difficile and 350 gram-positive and gram-negative aerobic and anaerobic intestinal flora isolates.
Article in Antimicrobial agents and chemotherapy, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
41 citing papers in PubMed, 80 citations in OpenAlex.
- A Randomized, Double-Blind, Phase 3 Safety and Efficacy Study of Ridinilazole Versus Vancomycin for Treatment of Clostridioides difficile Infection: Clinical Outcomes With Microbiome and Metabolome Correlates of Response.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2024Trial
- Antimicrobial susceptibility and ribotypes of Clostridium difficile isolates from a Phase 2 clinical trial of ridinilazole (SMT19969) and vancomycin.The Journal of antimicrobial chemotherapy · 2018Trial
- Efficacy and safety of ridinilazole compared with vancomycin for the treatment of Clostridium difficile infection: a phase 2, randomised, double-blind, active-controlled, non-inferiority study.The Lancet. Infectious diseases · 2017Trial
- A randomised phase 1 study to investigate safety, pharmacokinetics and impact on gut microbiota following single and multiple oral doses in healthy male subjects of SMT19969, a novel agent for Clostridium difficile infections.BMC infectious diseases · 2015Trial
- Effect of the antimicrobial peptide BmKn2-7 in inhibiting Vibrio parahaemolyticus and its role in improving microbiota, immunity and Vibrio resistance in Litopenaeus vannamei.BMC veterinary research · 2026Article
- Repurposing antibacterial drugs identifies ridinilazole and CRS3123 as promising candidates against vancomycin-resistant enterococci.Scientific reports · 2025Article
- Risk factors and outcomes of Clostridioides difficile infection in patients with colorectal cancer: critical perspective in management.Gut pathogens · 2025Review
- In vitro susceptibility of clinical Clostridioides difficile isolates in Israel to metronidazole, vancomycin, fidaxomicin, ridinilazole and ibezapolstat.BMC gastroenterology · 2025Article
- Fighting Antimicrobial Resistance: Innovative Drugs in Antibacterial Research.Angewandte Chemie (International ed. in English) · 2025Review
- European Practice for CDI Treatment.Advances in experimental medicine and biology · 2024Article
- In vitro activity of fidaxomicin and combinations of fidaxomicin with other antibiotics against Clostridium perfringens strains isolated from dogs and cats.BMC veterinary research · 2023Article
- A US-based national surveillance study for the susceptibility and epidemiology ofAntimicrobial agents and chemotherapy · 2023Article
- Ridinilazole: a novel, narrow-spectrum antimicrobial agent targeting Clostridium (Clostridioides) difficile.Letters in applied microbiology · 2022Review
- Ridinilazole, a narrow spectrum antibiotic for treatment ofAmerican journal of physiology. Gastrointestinal and liver physiology · 2020Article
- Curcumin: A natural derivative with antibacterial activity against Clostridium difficile.Journal of global antimicrobial resistance · 2020Article
- Investigational Treatment Agents for RecurrentJournal of experimental pharmacology · 2020Review
- Updates in Treatment of RecurrentJournal of clinical medicine research · 2019Review
- Clostridioides difficile Infection in the Stem Cell Transplant and Hematologic Malignancy Population.Infectious disease clinics of North America · 2019Review
- Management of adult Clostridium difficile digestive contaminations: a literature review.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2019Review
- Novel Antimicrobials for the Treatment ofFrontiers in medicine · 2018Review
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
The comparative in vitro activity of SMT19969, a novel, narrow-spectrum, nonabsorbable agent, was studied against 50 ribotype-defined Clostridium difficile strains, 174 Gram-positive and 136 Gram-negative intestinal anaerobes, and 40 Gram-positive aerobes. SMT19969 was one dilution more active against C. difficile isolates (MIC range, 0.125 to 0.5 μg/ml; MIC90, 0.25 μg/ml), including ribotype 027 strains, than fidaxomicin (range, 0.06 to 1 μg/ml; MIC90, 0.5 μg/ml) and two to six dilutions lower than either vancomycin or metronidazole. SMT19969 and fidaxomicin were generally less active against Gram-negative anaerobes, especially the Bacteroides fragilis group species, than vancomycin and metronidazole, suggesting that SMT19969 has a lesser impact on the normal intestinal microbiota that maintain colonization resistance. SMT19969 showed limited activity against other Gram-positive anaerobes, including Bifidobacteria species, Eggerthella lenta, Finegoldia magna, and Peptostreptococcus anaerobius, with MIC90s of >512, >512, 64, and 64 μg/ml, respectively. Clostridium species showed various levels of susceptibility, with C. innocuum being susceptible (MIC90, 1 μg/ml) and C. ramosum and C. perfringens being nonsusceptible (MIC90, >512 μg/ml). Activity against Lactobacillus spp. (range, 0.06 to >512 μg/ml; MIC90, >512 μg/ml) was comparable to that of fidaxomicin and varied by species and strain. Gram-positive aerobic cocci (Staphylococcus aureus, Enterococcus faecalis, E. faecium, and streptococci) showed high SMT19969 MIC90 values (128 to >512 μg/ml).
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.