In vitro bactericidal activity of levonadifloxacin (WCK 771) against methicillin- and quinolone-resistant Staphylococcus aureus biofilms.

CONCLUSION: These results show that levonadifloxacin has an improved bactericidal effect on biofilm-embedded quinolone-resistant S. aureus and meticillin-resistant S. aureus, and that it can be a promising treatment option for such infections. PMID: 31241446 [PubMed - as supplied by publisher]
Source: Journal of Medical Microbiology - Category: Microbiology Authors: Tags: J Med Microbiol Source Type: research

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Staphylococcus aureus, one of the most important human pathogens, is the causative agent of several infectious diseases including sepsis, pneumonia, osteomyelitis, endocarditis and soft tissue infections. This pathogenicity is due to a multitude of virulence factors including several cell wall-anchored proteins (CWA). CWA proteins have modular structures with distinct domains binding different ligands. The majority of S. aureus strains express two CWA fibronectin (Fn)-binding adhesins FnBPA and FnBPB (Fn-binding proteins A and B), which are encoded by closely related genes. The N-terminus of FnBPA and FnBPB comprises an A ...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
In this study, we first report a case of a child with MRSA-caused osteomyelitis who was successfully cured by VCM at a concentration of 4.86 μg/mL. VCM's clinical daily dose of more than 4 g was of concern in light of recent evidence suggesting the increased risks of nephrotoxicity and red man syndrome when Cmin ⩾15 μg/mL and doses ⩾10 mg/kg in children. As far as we know, this is the first report on the lower dose of VCM in children with MRSA osteomyelitis. PMID: 32567423 [PubMed - in process]
Source: International Journal of Immunopathology and Pharmacology - Category: Allergy & Immunology Tags: Int J Immunopathol Pharmacol Source Type: research
Infectious diseases are the second most important cause of human death worldwide; Staphylococcus aureus (S. aureus) is a very common human pathogenic microorganism that can trigger a variety of infectious diseases, such as skin and soft tissue infections, endocarditis, osteomyelitis, bacteremia, and lethal pneumonia. Moreover, according to the sensitivity to antibiotic drugs, S. aureus can be divided into methicillin-sensitive Staphylococcus aureus (MSSA) and methicillin-resistant Staphylococcus aureus (MRSA). In recent decades, due to the evolution of bacteria and the abuse of antibiotics, the drug resistance of S. aureus...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
Abstract To date, there has been little experience in using fosfomycin in children. However, its broad spectrum of action and excellent safety profile have renewed interest in this antibiotic, especially for treating infections by multidrug-resistant bacteria. The main indication for fosfomycin in pediatrics is currently community-acquired lower urinary tract infection. Given its good activity against bacteria, fosfomycin can also be useful in urinary infections caused by extended-spectrum beta-lactamase-producing enterobacteria. Fosfomycin presents very good dissemination to tissues including bone and is therefor...
Source: Revista Espanola de Quimioterapia - Category: Drugs & Pharmacology Authors: Tags: Rev Esp Quimioter Source Type: research
Conclusions: We present the most detailed genomic analysis of MRSA isolated in Sri Lanka to date. The analysis identified a PVL-positive ST5-MRSA-IVc that is prevalent among MRSA causing clinical infections in Sri Lanka. Furthermore, this clone was also found among isolates from the United Kingdom and Australia. Introduction Worldwide, Staphylococcus aureus is the primary causative agent of community-acquired skin and soft tissue infections (SSTI) and is an important cause of hospital-associated invasive infections including bacteremia, pneumonia and endocarditis (Bell et al., 2002; David and Daum, 2010). Panton-Va...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
This study identified prophages as mediators of bacterial virulence in a model of infectious endocarditis, probably through promotion of interaction with extracellular matrix components. Further studies are needed to identify mechanisms leading to promotion of intrinsic virulence. Introduction Challenges related to Staphylococcus aureus infections in the human and veterinary clinics mobilized important human and technical resources. S. aureus can colonize 20–30% of the general population asymptomatically but is also capable of causing a wide spectrum of diseases ranging from benign infections, to particularly...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
This study was conducted with the hypothesis that the simultaneous lack of BCFAs and staphyloxanthin will have a far greater implication on environmental survival and virulence of S. aureus. Lack of a functional branched-chain α-keto acid dehydrogenase (BKD) enzyme because of a mutation in the lpdA gene led to a decrease in the production of BCFAs, membrane fluidity, slower growth, and poor in vivo survival of S. aureus. A mutation in the crtM gene eliminated the production of staphyloxanthin but it did not affect membrane BCFA levels, fluidity, growth, or in vivo survival. A crtM:lpdA double mutant showed much slowe...
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
ueiredo AM Abstract Staphylococcus aureus subsp. aureus, commonly referred as S. aureus, is an important bacterial pathogen frequently involved in hospital- and community-acquired infections in humans, ranging from skin infections to more severe diseases such as pneumonia, bacteraemia, endocarditis, osteomyelitis, and disseminated infections. Here, we report the complete closed genome sequence of a community-acquired methicillin-resistant S. aureus strain, USA400-0051, which is a prototype of the USA400 clone. PMID: 29091141 [PubMed - in process]
Source: Memorias do Instituto Oswaldo Cruz - Category: Infectious Diseases Authors: Tags: Mem Inst Oswaldo Cruz Source Type: research
Conclusion: We demonstrate a novel mechanism how bacterial toxins activate the inflammasome and mediate the formation and release of cytokines:S. aureusα-toxin triggers an activation of the acid sphingomyelinase and a release of ceramides resulting in the release of lysosomal cathepsin B and formation of pro-inflammatory cytokines.Cell Physiol Biochem 2017;43:2170 –2184
Source: Cellular Physiology and Biochemistry - Category: Cytology Source Type: research
CONCLUSIONS: When compared with clinical trials, ceftaroline use appears to be associated with an increased rate of overall adverse events, which is driven by cutaneous reactions. PMID: 28980484 [PubMed - as supplied by publisher]
Source: The Annals of Pharmacotherapy - Category: Drugs & Pharmacology Authors: Tags: Ann Pharmacother Source Type: research
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