To trace evolution of Panton-Valentine leucocidin-positive clonal complex 398 methicillin-resistant Staphylococcus aureus (MRSA) in the Czech Republic, we tested 103 MRSA isolates from humans. Five (4.9%) were Panton-Valentine leucocidin-positive clonal complex 398, sequence types 1232 and 9181. Spread to the Czech Republic may result from travel to or from other countries.
- MeSH
- bakteriální toxiny * biosyntéza genetika MeSH
- dějiny 21. století MeSH
- dospělí MeSH
- exotoxiny * genetika biosyntéza MeSH
- leukocidiny * genetika MeSH
- lidé MeSH
- methicilin rezistentní Staphylococcus aureus * genetika izolace a purifikace MeSH
- stafylokokové infekce * mikrobiologie epidemiologie MeSH
- Check Tag
- dějiny 21. století MeSH
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- historické články MeSH
- Geografické názvy
- Česká republika MeSH
Complex injuries to the posterior trunk can still pose a significant challenge to the reconstructive surgeon. Due to the lack of skin laxity, dependent anatomical location and the importance of the deeper structures, a systematic approach tailored to the individual defect should be considered for these types of reconstructions. In our case report, we present a reconstructive solution of a chronic defect of the back caused by resection of an ulceration. What was previously considered to be a relapse of a malignant melanoma turned out to be a chronic osteomyelitis of the spinous processes of the thoracic vertebrae. The defect after the resection of the ulceration and infected spinous processes of the thoracic vertebrae with exposed dorsal lamina was covered with pedicled myocutaneous flap. Reconstruction yielded well-vascularized tissue that provided sufficient volume and tissue quality. Even in the light of modern perforator flaps, local or locoregional muscle and myocutaneous flaps remain the first choice for the treatment of deep back defects. Considering all the factors in the given case, plastic surgeons are able to tailor the reconstructive technique to every individual case to match the desired reconstruction goal.
- MeSH
- chirurgické laloky * chirurgie MeSH
- dermatochirurgické výkony metody MeSH
- hrudní obratle chirurgie patologie MeSH
- lidé MeSH
- maligní melanom kůže komplikace MeSH
- osteomyelitida * chirurgie MeSH
- pooperační péče metody MeSH
- senioři MeSH
- stafylokokové infekce komplikace MeSH
- vřed chirurgie komplikace patologie MeSH
- záda chirurgie patologie MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- Publikační typ
- kazuistiky MeSH
Dalbavancin is increasingly being used for long-term treatment of subacute and chronic staphylococcal infections. In this study, a new Bayesian model was implemented and validated using MwPharm software for accurately forecasting the duration of pharmacodynamic target attainment above the efficacy thresholds of 4.02 mg/L or 8.04 mg/L against staphylococci. Forecasting accuracy improved substantially with the a posteriori approach compared with the a priori approach, particularly when two measured concentrations were used. This strategy may help clinicians to estimate the duration of optimal exposure with dalbavancin in the context of long-term treatment.
- MeSH
- antibakteriální látky * terapeutické užití farmakologie MeSH
- Bayesova věta MeSH
- lidé MeSH
- mikrobiální testy citlivosti MeSH
- stafylokokové infekce * farmakoterapie MeSH
- Staphylococcus MeSH
- teikoplanin terapeutické užití farmakologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa are major causes of hospital-acquired infections and sepsis. Due to increasing antibiotic resistance, new treatments are needed. Mesenchymal stem cells (MSCs) have antimicrobial effects, which can be enhanced by preconditioning with antibiotics. This study investigated using antibiotics to strengthen MSCs against MRSA and P. aeruginosa. MSCs were preconditioned with linezolid, vancomycin, meropenem, or cephalosporin. Optimal antibiotic concentrations were determined by assessing MSC survival. Antimicrobial effects were measured by minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and antimicrobial peptide (AMP) gene expression. Optimal antibiotic concentrations for preconditioning MSCs without reducing viability were 1 μg/mL for linezolid, meropenem, and cephalosporin and 2 μg/mL for vancomycin. In MIC assays, MSCs preconditioned with linezolid, vancomycin, meropenem, or cephalosporin inhibited MRSA or P. aeruginosa growth at lower concentrations than non-preconditioned MSCs (p ≤ 0.001). In MBC assays, preconditioned MSCs showed enhanced bacterial clearance compared to non-preconditioned MSCs, especially when linezolid and vancomycin were used against MRSA (p ≤ 0.05). Preconditioned MSCs showed increased expression of genes encoding the antimicrobial peptide genes hepcidin and LL-37 compared to non-preconditioned MSCs. The highest hepcidin expression was seen with linezolid and vancomycin preconditioning (p ≤ 0.001). The highest LL-37 expression was with linezolid preconditioning (p ≤ 0.001). MSCs' preconditioning with linezolid, vancomycin, meropenem, or cephalosporin at optimal concentrations enhances their antimicrobial effects against MRSA and P. aeruginosa without compromising viability. This suggests preconditioned MSCs could be an effective adjuvant treatment for antibiotic-resistant infections. The mechanism may involve upregulation of AMP genes.
- MeSH
- antibakteriální látky farmakologie terapeutické užití MeSH
- antimikrobiální peptidy MeSH
- cefalosporiny farmakologie MeSH
- hepcidiny farmakologie terapeutické užití MeSH
- lidé MeSH
- linezolid farmakologie terapeutické užití MeSH
- meropenem farmakologie terapeutické užití MeSH
- methicilin rezistentní Staphylococcus aureus * MeSH
- mezenchymální kmenové buňky * MeSH
- mikrobiální testy citlivosti MeSH
- Pseudomonas aeruginosa genetika MeSH
- stafylokokové infekce * mikrobiologie MeSH
- vankomycin MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
x
x
- MeSH
- exfoliatiny izolace a purifikace škodlivé účinky MeSH
- leukocidiny izolace a purifikace škodlivé účinky MeSH
- lidé MeSH
- polymerázová řetězová reakce MeSH
- septický šok etiologie MeSH
- stafylokokové infekce * mortalita MeSH
- Staphylococcus aureus * izolace a purifikace klasifikace MeSH
- Check Tag
- lidé MeSH
- Geografické názvy
- Česká republika MeSH
Staphylococcus aureus infections present a significant threat to the global healthcare system. The increasing resistance to existing antibiotics and their limited efficacy underscores the urgent need to identify new antibacterial agents with low toxicity to effectively combat various S. aureus infections. Hence, in this study, we have screened T-muurolol for possible interactions with several S. aureus-specific bacterial proteins to establish its potential as an alternative antibacterial agent. Based on its binding affinity and interactions with amino acids, T-muurolol was identified as a potential inhibitor of S. aureus lipase, dihydrofolate reductase, penicillin-binding protein 2a, D-Ala:D-Ala ligase, and ribosome protection proteins tetracycline resistance determinant (RPP TetM), which indicates its potentiality against S. aureus and its multi-drug-resistant strains. Also, T-muurolol exhibited good antioxidant and anti-inflammatory activity by showing strong binding interactions with flavin adenine dinucleotide (FAD)-dependent nicotinamide adenine dinucleotide phosphate (NAD(P)H) oxidase, and cyclooxygenase-2. Consequently, molecular dynamics (MD) simulation and recalculating binding free energies elucidated its binding interaction stability with targeted proteins. Furthermore, quantum chemical structure analysis based on density functional theory (DFT) depicted a higher energy gap between the highest occupied molecular orbital and lowest unoccupied molecular orbital (EHOMO-LUMO) with a lower chemical potential index, and moderate electrophilicity suggests its chemical hardness and stability and less polarizability and reactivity. Additionally, pharmacological parameters based on ADMET, Lipinski's rules, and bioactivity score validated it as a promising drug candidate with high activity toward ion channel modulators, nuclear receptor ligands, and enzyme inhibitors. In conclusion, the current findings suggest T-muurolol as a promising alternative antibacterial agent that might be a potential phytochemical-based drug against S. aureus. This study also suggests further clinical research before human application.
- MeSH
- antibakteriální látky * farmakologie chemie MeSH
- antioxidancia farmakologie chemie MeSH
- bakteriální proteiny antagonisté a inhibitory metabolismus chemie MeSH
- fytonutrienty * farmakologie chemie MeSH
- lidé MeSH
- objevování léků * metody MeSH
- počítačová simulace MeSH
- simulace molekulární dynamiky MeSH
- simulace molekulového dockingu MeSH
- stafylokokové infekce farmakoterapie mikrobiologie MeSH
- Staphylococcus aureus * účinky léků MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
V článku je zpracována problematika empirické perorální antibiotické terapie nejčastějších akutních komunitních bakteriální infekcí u dětí, a sice tonzilitidy, otitis media, sinusitidy, pneumonie, cystitidy, pyelonefritidy, erysipelu, flegmóny, impetiga a erythema migrans. Kromě antibiotik první volby jsou uvedeny i alternativy při výpadku antibiotik nebo při alergii. Součástí doporučení jsou také magistraliter receptury vybraných antibiotik. V článku je dále věnována pozornost klasifikaci antibiotik AWaRe, která rozděluje dostupná antibiotika do tří skupin podle rizika indukce rezistence bakterií.
This article addresses the issue of empirical oral antibiotic therapy for the most common acute community-acquired bacterial infections in children, specifically tonsillitis, otitis media, sinusitis, pneumonia, cystitis, pyelonephritis, erysipelas, cellulitis, impetigo, and erythema migrans. In addition to first-choice antibiotics, alternatives are provided in cases of antibiotic shortages or allergies. The recommendations also include magistral (compounded, pharmacist-prepared) formulas for selected antibiotics. The article further focuses on the AWaRe classification of antibiotics, which divides available antibiotics into three groups according to the risk of inducing bacterial resistance.
- MeSH
- antibakteriální látky * farmakologie klasifikace terapeutické užití MeSH
- antibiotická rezistence MeSH
- bakteriální infekce * epidemiologie farmakoterapie klasifikace MeSH
- bakteriální pneumonie farmakoterapie MeSH
- dítě MeSH
- impetigo etiologie farmakoterapie klasifikace MeSH
- lidé MeSH
- otitis media farmakoterapie klasifikace MeSH
- příprava léků klasifikace metody MeSH
- sinusitida farmakoterapie MeSH
- směrnice pro lékařskou praxi jako téma MeSH
- tonzilitida farmakoterapie MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- Publikační typ
- přehledy MeSH
Staphylococcus aureus, a notorious pathogen with versatile virulence, poses a significant challenge to current antibiotic treatments due to its ability to develop resistance mechanisms against a variety of clinically relevant antibiotics. In this comprehensive review, we carefully dissect the resistance mechanisms employed by S. aureus against various antibiotics commonly used in clinical settings. The article navigates through intricate molecular pathways, elucidating the mechanisms by which S. aureus evades the therapeutic efficacy of antibiotics, such as β-lactams, vancomycin, daptomycin, linezolid, etc. Each antibiotic is scrutinised for its mechanism of action, impact on bacterial physiology, and the corresponding resistance strategies adopted by S. aureus. By synthesising the knowledge surrounding these resistance mechanisms, this review aims to serve as a comprehensive resource that provides a foundation for the development of innovative therapeutic strategies and alternative treatments for S. aureus infections. Understanding the evolving landscape of antibiotic resistance is imperative for devising effective countermeasures in the battle against this formidable pathogen.
- MeSH
- antibakteriální látky * farmakologie terapeutické užití MeSH
- bakteriální léková rezistence MeSH
- lidé MeSH
- mikrobiální testy citlivosti MeSH
- stafylokokové infekce * farmakoterapie mikrobiologie MeSH
- Staphylococcus aureus * účinky léků MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
Impetigo je najčastejšia bakteriálna infekcia kože u detí vo veku od 2 do 5 rokov. Ide o mimoriadne infekčné ochorenie s výskytom malých epidémií u detí s nízkym hygienickým štandardom alebo malnutríciou. Zdrojom infekcie je človek so streptokokovou infekciou, prípadne bezpríznakový nosič. Najprv dochádza ku kolonizácii neporušenej kože a následne infekcia preniká do intradermálnych štruktúr. Autorky v príspevku sprístupňujú prípadovú štúdiu dieťaťa s dg. Impetigo.
Impetigo is the most common bacterial skin infection in children aged 2 to 5 years. It is an extremely infectious disease with the occurrence of small epidemics in children with low hygiene standards or malnutrition. The source of infection is a person with a streptococcal infection, or an asymptomatic carrier. First, intact skin is colonized, and then the infection penetrates into intradermal structures. In the article, the authors make available a case study of a child with dg. Impetigo.
- MeSH
- bakteriální nemoci kůže diagnóza klasifikace patofyziologie patologie MeSH
- diferenciální diagnóza MeSH
- herpes simplex diagnóza etiologie patologie MeSH
- impetigo klasifikace patologie MeSH
- infekce virem varicella zoster diagnóza patofyziologie patologie terapie MeSH
- infekční nemoci kůže * diagnóza klasifikace patofyziologie patologie MeSH
- kandidóza kožní diagnóza patofyziologie patologie terapie MeSH
- lidé MeSH
- novorozenec MeSH
- stafylokoková toxická epidermální nekrolýza diagnóza patologie MeSH
- svrab diagnóza etiologie patologie terapie MeSH
- virová kožní onemocnění diagnóza klasifikace MeSH
- Check Tag
- lidé MeSH
- novorozenec MeSH
- Publikační typ
- přehledy MeSH
