Article
Fluoroquinolones and anaerobes.
Department of Medicine, Michigan State University, East Lansing, Michigan 48824, USA.
Clinical Infectious Diseases (impact factor:
9.15).
07/2006;
42(11):1598-607.
DOI:10.1086/503907
Source: PubMed
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Citations (0)
- Cited In (2)
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Article: Enhanced production of phospholipase C and perfringolysin O (alpha and theta toxins) in a gatifloxacin-resistant strain of Clostridium perfringens.
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ABSTRACT: Clostridium perfringens-induced gas gangrene is mediated by potent extracellular toxins, especially alpha toxin (a phospholipase C [PLC]) and theta toxin (perfringolysin O [PFO], a thiol-activated cytolysin); and antibiotic-induced suppression of toxin synthesis is an important clinical goal. The production of PLC and PFO by a gatifloxacin-induced, fluoroquinolone-resistant mutant strain of C. perfringens, strain 10G, carrying a stable mutation in DNA gyrase was compared with that of the wild-type (WT) parent strain. Zymography (with sheep red blood cell and egg yolk overlays) and time course analysis [with hydrolysis of egg yolk lecithin and O-(4 nitrophenyl-phosphoryl)choline] demonstrated that strain 10G produced more PLC and PFO than the WT strain. Increased toxin production in strain 10G was not related either to differences in growth characteristics between the wild-type and the mutant strain or to nonsynonymous polymorphisms in PLC, PFO, or their known regulatory proteins. Increased PLC and PFO production by strain 10G was associated with increased cytotoxic activity for HT-29 human adenocarcinoma cells and with increased platelet-neutrophil aggregate formation. Four other gatifloxacin-induced gyrase mutants did not show increased toxin production, suggesting that gatifloxacin resistance was not always associated with increased toxin production in all strains of C. perfringens. This is the first report of increased toxin production in a fluoroquinolone-resistant strain of C. perfringens.Antimicrobial Agents and Chemotherapy 04/2008; 52(3):895-900. · 4.84 Impact Factor -
Article: Clinical update on the use of moxifloxacin in the treatment of community-acquired complicated intraabdominal infections.
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ABSTRACT: Community-acquired complicated intraabdominal infections (cIAIs) present problems for clinicians and have substantial impact on hospital resources. Because of the polymicrobial nature of these infections, successful management of cIAIs depends on timely and appropriate use of antisepsis and antiinfective strategies. The literature pertinent to this article was reviewed. The Surgical Infection Society and the Infectious Disease Society of America guidelines recommend a variety of single and combined antimicrobial therapies, including fluoroquinolone therapy, for prophylactic and definitive treatment of cIAIs with different severities. Moxifloxacin, a fluoroquinolone, demonstrates a broad spectrum of antimicrobial (including anaerobic) activity, good tissue penetration into the gastrointestinal tract, and a good tolerability profile. Clinical data also have demonstrated that moxifloxacin is effective as monotherapy for patients with cIAIs. This review identifies the clinical issues impacting antimicrobial selection in cIAI and discusses data on the role of moxifloxacin in light of the current guidelines for management of these patients. Moxifloxacin provides clinicians with a convenient monotherapy option for the treatment of mild-to-moderate cIAIs.Surgical Infections 10/2010; 11(5):487-94. · 1.80 Impact Factor
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Keywords
antibiotics
Bacteroides group
clinical practice
clinical trials
clinically relevant susceptibility breakpoints
Clostridium difficile-associated disease
fluoroquinolones
major concerns
mixed aerobic
new data
newer agents
Newer compounds
Pharmacodynamic analyses
selective anaerobic pathogens
vitro activity