The rapid evolution and spread of multidrug resistance among bacterial pathogens has significantly outpaced the development of new antibiotics, underscoring the urgent need for alternative therapies. Antimicrobial photodynamic therapy and antimicrobial sonodynamic therapy have emerged as promising treatments. Antimicrobial photodynamic therapy relies on the interaction between light and a photosensitizer to produce reactive oxygen species, which are highly cytotoxic to microorganisms, leading to their destruction without fostering resistance. Antimicrobial sonodynamic therapy, a novel variation, substitutes ultrasound for light to activate the sonosensitizers, expanding the therapeutic reach. To increase the efficiency of antimicrobial photodynamic therapy and antimicrobial sonodynamic therapy, the combination of these two methods, known as antimicrobial photo-sonodynamic therapy, is currently being explored and considered a promising approach. Recent advances, particularly in the application of nanomaterials, have further enhanced the efficacy of these therapies. Nanosensitizers, due to their improved reactive oxygen species generation and targeted delivery, offer significant advantages in overcoming the limitations of conventional sensitizers. These breakthroughs provide new avenues for treating bacterial infections, especially multidrug-resistant strains and biofilm-associated infections. Continued research, including comprehensive clinical studies, is crucial to optimizing nanomaterial-based antimicrobial photo-sonodynamic therapy for clinical use, ensuring their effectiveness in real-world applications.
- MeSH
- antibakteriální látky * farmakologie MeSH
- Bacteria účinky léků MeSH
- bakteriální infekce * farmakoterapie mikrobiologie terapie MeSH
- biofilmy účinky léků MeSH
- fotochemoterapie * metody MeSH
- fotosenzibilizující látky * farmakologie MeSH
- lidé MeSH
- nanočástice chemie MeSH
- nanostruktury chemie MeSH
- reaktivní formy kyslíku metabolismus MeSH
- ultrazvuková terapie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
Background: Hydatidosis is a deadly parasitic disease that affects both humans and animals. It has received much attention due to widespread health and economic concerns. Materials and Methods: Thirty-three hydatid cysts from the slaughterhouse and butcher shops were analyzed, 17 from the lung and 16 from the liver. The specimens were collected from hydatid fluid and grown on nutritional agar and MacConkey agar using a sterile loop. A Vitek- 2 compact instrument was used to identify bacteria. The viability of the protoscoleces was also determined in these hydatid cysts. Results: The secondary infection rate with bacteria in hepatic and pulmonary hydatid cysts was 24 (72.7%) from a total of thirty-three samples. Several types of bacteria have been isolated from hepatic and pulmonary hydatid cysts. Aeromonas hydrophila had the highest infection rate in hepatic and pulmonary hydatid cysts reaching 20.83% while the lowest infection rate was 4.17% for Leuconostoc mesenteriodes, Lactococcus garvieae, Staphylococcus sciuri, and Staphylococcus hominis, Streptococcus uberis, Pseudomonas stutzer and Vibro vulnificus. Staphylococcus lentus and Lactococcus garvieae had the highest effect on the viability of protoscoleces in liver and lung, reaching 0%, and 13% respectively. Eleven of a total of 13 types of bacteria isolated from hydatid cysts in the liver and lung: were diagnosed for the first time and had not previously been recognized by earlier investigation. The rates of bacterial infection in hepatic and pulmonary hydatid cysts were 76.47% and 68.75%, respectively. Conclusion: The results of our current study indicate that the secondary infection rate with bacteria in hepatic and pulmonary hydatid cysts reached (72.7%), and different types of bacteria in hepatic and pulmonary hydatid cysts have a clear effect on the viability of protoscoleces.
- Klíčová slova
- protoskolex,
- MeSH
- Bacteria izolace a purifikace klasifikace patogenita MeSH
- bakteriální infekce * mikrobiologie parazitologie patologie MeSH
- Echinococcus mikrobiologie růst a vývoj MeSH
- echinokokóza mikrobiologie MeSH
- klinické laboratorní techniky metody přístrojové vybavení MeSH
- mikrobiální viabilita MeSH
- ovce * mikrobiologie parazitologie MeSH
- statistika jako téma MeSH
- Publikační typ
- klinická studie MeSH
The main aims of the research were to produce efficient nanofibrous filters with long-term antibacterial properties and to confirm the functionality of samples under real filtration conditions. A polyurethane solution was modified by micro- or nanoparticles of copper oxide in order to juxtapose the aggregation tendency of particles depending on their size. Modified solutions were electrospun by the Nanospider technique. The roller spinning electrode with a needle surface and static wire electrode were used for the production of functionalized nanofibers. The antibacterial properties of the modified nanofibrous layers were studied under simulated conditions of water and air filtration. Particular attention was paid to the fixation mechanism of modifiers in the structure of filters. It was determined that the rotating electrode with the needle surface is more efficient for the spinning of composite solutions due to the continuous mixing and the avoidance of particle precipitation at the bottom of the bath with modified polyurethane. Moreover, it was possible to state that microparticles of copper oxide are more appropriate antimicrobial additives due to their weaker aggregation tendency but stronger fixation in the fibrous structure than nanoparticles. From the results, it is possible to conclude that nanofibers with well-studied durable antibacterial properties may be recommended as excellent materials for water and air filtration applications.
In the Mekong Delta region of Vietnam, small-scale chicken farming is common. However, high levels of disease or mortality in such flocks impair economic development and challenge the livelihoods of many rural households. We investigated 61 diseased small-scale flocks (122 chickens) for evidence of infection with 5 bacteria, 4 viruses, and helminths. Serological profiles (ELISA) were also determined against 6 of these pathogens. The aims of this study were the following: (1) to investigate the prevalence of different pathogens and to compare the probability of detection of bacterial pathogens using PCR and culture; (2) to investigate the relationship between detection of organisms in birds' tissues and the observed morbidity and mortality, as well as their antibody profile; and (3) to characterize risk factors for infection with specific viral or bacterial pathogens. We used PCR to test for viral (viruses causing infectious bronchitis [IB], highly pathogenic avian influenza [HPAI], Newcastle disease, and infectious bursal disease [IBD]) and bacterial pathogens (Mycoplasma gallisepticum, Pasteurella multocida, Avibacterium paragallinarum, and Ornithobacterium rhinotracheale [ORT]). The latter two were also investigated in respiratory tissues by conventional culture. Colisepticemic Escherichia coli was investigated by liver or spleen culture. In 49 of 61 (80.3%) flocks, at least one bacterial or viral pathogen was detected, and in 29 (47.5%) flocks, more than one pathogen was detected. A. paragallinarum was detected in 62.3% flocks, followed by M. gallisepticum (26.2%), viruses causing IBD (24.6%) and IB (21.3%), septicemic E. coli (14.8%), ORT (13.1%), and HPAI viruses (4.9%). Of all flocks, 67.2% flocks were colonized by helminths. Mortality was highest among flocks infected with HPAI (100%, interquartile range [IQR]: 81.6-100%) and lowest with flocks infected with ORT (5.3%, IQR: 1.1-9.0%). The results indicated slight agreement (kappa ≤ 0.167) between detection by PCR and culture for both A. paragallinarum and ORT, as well as between the presence of cestodes and ORT infection (kappa = 0.317). Control of A. paragallinarum, viruses causing HPAI, IBD, and IB, M. gallisepticum, and gastrointestinal helminths should be a priority in small-scale flocks.
- MeSH
- bakteriální infekce epidemiologie mikrobiologie veterinární MeSH
- kur domácí * MeSH
- morbidita MeSH
- mortalita MeSH
- nemoci drůbeže epidemiologie mikrobiologie parazitologie virologie MeSH
- parazitární nemoci u zvířat epidemiologie parazitologie MeSH
- polymerázová řetězová reakce veterinární MeSH
- prevalence MeSH
- rizikové faktory MeSH
- tvorba protilátek MeSH
- virové nemoci epidemiologie veterinární virologie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Vietnam MeSH
In the last two decades, microbiology laboratories have radically changed by the introduction of novel technologies, like Next-Generation Sequencing (NGS) and Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS). Nevertheless, emergence of antibiotic-resistant microorganisms represents a global threat of current medicine, being responsible for increasing mortality and health-care direct and indirect costs. In addition, the identification of antibiotic-resistant microorganisms, like OXA-48 carbapenemase-producing Enterobacteriaceae, has been changeling for clinical microbiology laboratories. Even the cost of NGS technology and MALDI-TOF MS equipment is relatively high, both technologies are increasingly used in diagnostic and research protocols. Therefore, the aim of this review is to present applications of these technologies used in clinical microbiology, especially in detection of antibiotic resistance and its surveillance, and to propose a combinatory approach of MALDI-TOF MS and NGS for the investigation of microbial associated infections.
- MeSH
- antibakteriální látky farmakologie MeSH
- Bacteria klasifikace účinky léků genetika izolace a purifikace MeSH
- bakteriální infekce diagnóza mikrobiologie MeSH
- bakteriální léková rezistence * MeSH
- hmotnostní spektrometrie metody MeSH
- laboratoře nemocniční MeSH
- lidé MeSH
- vysoce účinné nukleotidové sekvenování metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
Rapid identification of pathogen and its resistance to antimicrobial drugs, and subsequent appropriate antimicrobial treatment are essential for correct patient outcomes. Conventional detection methods of bacterial resistance, such as disc diffusion, broth microdilution and automated instruments, are constantly widely used and primarily standardized. Nevertheless, the results cannot be obtained earlier than 48 h after receiving a sample, which may lead to prolonged use or overuse of broad-spectrum antibiotics. Hence, there is a drive to develop and introduce novel, faster, standardized, sensitive and specific methods with reliable results into routine microbiological laboratory practice. Recently developed matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has been introduced in recent years into laboratory practice, and methods based on microfluidics and microdroplets might be introduced in the near future. This review is focused on the methods and instruments in use both currently and in the foreseeable future, applicable to determine antimicrobial efficacy in clinical microbiology laboratories.
Descendentná nekrotizujúca mediastinitída je závažná, rýchlo progredujúca, život ohrozujúca bakteriálna infekcia postihujúca mediastinum. Aj napriek pokrokom v diagnostike a terapii je stále zaťažená vysokou mortalitou. Zlatý štandard diagnostiky descendentnej nekrotizujúcej mediastinitídy je kontrastné CT vyšetrenie krku a hrudníka. Základným terapeutickým cieľom je dôkladný debridement a drenáž mediastinálnych priestorov. Autori v kazuistike uvádzajú obzvlášť komplikovaný priebeh u pacientky s cervikálnou nekrotizujúcou fascitídou a descendentnou nekrotizujúcou mediastinitídou. Pacientku iniciálne ošetrili pre hlbokú krčnú infekciu na ORL pracovisku. Po adekvátnom chirurgickom ošetrení descendentnej nekrotizujúcej mediastinitídy na pracovisku hrudníkovej chirurgie, nasadení antibiotickej terapie a stabilizácii stavu pacientky na oddelení intenzívnej medicíny sa autori v ďalšom priebehu hospitalizácie stretli s viacerými komplikáciami pri ošetrovaní tracheostómie a krčného nálezu, ktoré vyžadovali modifikované terapeutické postupy. Z toho dôvodu pacientka podstúpila opakované hospitalizácie a chirurgické výkony, ktoré predĺžili dobu liečenia na 220 dní.
Descending necrotizing mediastinitis is a severe, fulminant, life-threatening bacterial infection of the mediastinum. Even though improvements in diagnostics and treatment were achieved, the mortality rate remain shigh. Contrast-enhanced CT of chest and neck is the diagnostic gold standard. Radical debridement and drainage of the mediastinum should be considered the primary therapeutic target. The authors present a complicated case of a female patient with cervical necrotizing fasciitis and descending necrotizing mediastinitis. She was initially treated for a deep neck infection at the department of otorhinolaryngology. Surgical treatment, antibiotics, and intensive care became an integral part of the therapy after the transfer to the department of thoracic surgery. The authors had to face various complications with tracheostomy and extensively debrided soft tissues in the neck region. That is why the patient underwent repeated surgeries during several hospital stays, with an overall duration of treatment reaching 220 days.
- Klíčová slova
- descendentní nekrotizující mediastinitida, hluboká krční infekce,
- MeSH
- antibakteriální látky terapeutické užití MeSH
- bakteriální infekce * farmakoterapie komplikace mikrobiologie MeSH
- debridement MeSH
- fascie patologie MeSH
- hojení ran MeSH
- lidé středního věku MeSH
- lidé MeSH
- mediastinitida * diagnostické zobrazování komplikace terapie MeSH
- pooperační komplikace MeSH
- tracheostomie MeSH
- výsledek terapie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
- MeSH
- Bacteria klasifikace patogenita MeSH
- bakteriální infekce * diagnóza mikrobiologie terapie MeSH
- bakteriologie * klasifikace MeSH
- gramnegativní bakterie klasifikace patogenita účinky léků MeSH
- grampozitivní bakterie klasifikace patogenita účinky léků MeSH
- klinické laboratorní techniky metody MeSH
- lidé MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
Essential oils obtained via the hydrodistillation of two Asian herbs (Houttuynia cordata and Persicaria odorata) were analyzed by gas chromatography coupled to mass spectrometry (GC-MS) and gas chromatography with flame ionization detector (GC-FID). Additionally, both the liquid and vapor phase of essential oil were tested on antimicrobial activity using the broth microdilution volatilization method. Antimicrobial activity was tested on Gram-negative and Gram-positive bacteria-Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Enterococcus faecalis, Streptococcus pyogenes, Klebsiella pneumoniae, Seratia marcescense and Bacillus subtilis. Hydrodistillation produced a yield of 0.34% (Houttuynia cordata) and 0.40% (Persicaria odorata). 41 compounds were identified in both essential oils. Essential oils contained monoterpenes and their oxidized forms, sesquiterpenes and their oxidized forms, oxidized diterpenes, derivates of phenylpropene and other groups, such as, for example, aldehydes, alcohols or fatty acids. Both essential oils were antimicrobial active in both vapor and liquid phases at least in case of one bacterium. They expressed various antimicrobial activity in the range of 128-1024 μg∙mL-1, 512-1024 μg∙mL-1 in broth and 1024 μg∙mL-1, 512-1024 μg∙mL-1 in agar, respectively. Research showed new interesting information about P. odorata and H. cordata essential oils and demonstrated that both essential oils could be possibly used in the field of natural medicine or natural food preservation.
- MeSH
- antibakteriální látky chemie farmakologie MeSH
- bakteriální infekce farmakoterapie mikrobiologie MeSH
- extrakce kapalina-kapalina MeSH
- grampozitivní bakterie účinky léků MeSH
- Houttuynia chemie MeSH
- lidé MeSH
- mikrobiální testy citlivosti MeSH
- oleje prchavé chemie farmakologie MeSH
- plynová chromatografie s hmotnostně spektrometrickou detekcí MeSH
- Polygonaceae chemie MeSH
- rostlinné extrakty chemie farmakologie MeSH
- Staphylococcus aureus účinky léků patogenita MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
