scispace - formally typeset
Search or ask a question

What are the most common resistance mechanisms detected through whole-genome sequencing (WGS) in bacterial populations? 


Best insight from top research papers

Through whole-genome sequencing (WGS), common resistance mechanisms detected in bacterial populations include the presence of genes like cfr, optrA, and poxtA, mutations in 23S rRNA, and ribosomal proteins (L3, L4, L22). Additionally, the resistome encompasses a variety of genes facilitating antibiotic resistance, such as linezolid methyltransferases (cfr), aminoglycoside ribosomal methylases (armA, rtmB), and efflux pumps conferring fluoroquinolone resistance (qepA). WGS aids in identifying acquired antibiotic resistance genes and mutations, allowing for accurate prediction of resistance patterns. Furthermore, WGS has been instrumental in characterizing the resistome in clinical bacterial isolates, highlighting the importance of standardized procedures and databases for reliable antimicrobial resistance genotyping. This multidisciplinary approach has also been used to monitor genetic patterns of antimicrobial resistance in livestock-wildlife interfaces, revealing resistance to critical antibiotics like linezolid.

Answers from top 5 papers

More filters
Papers (5)Insight
The most common resistance mechanisms detected through WGS in bacterial populations include plasmid-borne AMR genes, enhanced sensitivity with hybrid assemblies of short and long reads, and challenges in distinguishing mobile from chromosomal genes.
Resistance mechanisms detected through WGS in bacterial populations include phenotypic and genotypic resistance to tetracycline, linezolid, carbapenems, and virulence genes related to biofilm regulation and Shiga toxins.
Common resistance mechanisms detected through WGS include 57 acquired resistance genes and 18 mutations for various antibiotics, aiding in predicting phenotypic resistance accurately in E. coli isolates.
Common resistance mechanisms detected through WGS in bacterial populations include cfr, armA, rtmB for ribosomal methyltransferases, qepA for efflux pumps, and biofilm resistance genes.
The most common resistance mechanisms detected through WGS in Staphylococcus haemolyticus populations are the cfr gene, G2603T mutation in 23S rRNA, and R138V mutation in L3 ribosomal protein.

Related Questions

What reference databases are used in the process of identifying resistance genes through WGS?5 answersIn the process of identifying resistance genes through Whole Genome Sequencing (WGS), researchers utilize reference databases such as CARD and ResFinder. These databases play a crucial role in predicting antimicrobial resistance (AMR) phenotypes from genotypes, enabling informed treatment decisions based on genomic data. Additionally, the Reference Gene Catalog is another example of a database used for this purpose, providing curated genes, point mutations, blast rules, and hidden Markov models for AMRFinderPlus. These databases are essential for analyzing AMR genes in bacterial isolates, aiding in the accurate identification of antimicrobial resistance markers and improving the performance of WGS-based AST (Antibiotic Susceptibility Testing).
What are the mechanisms of antibiotic resistance in Acinetobacter baumannii?5 answersAcinetobacter baumannii has developed multiple mechanisms of antibiotic resistance. One mechanism is the upregulation of putative drug efflux pumps, which leads to efflux-associated resistance to antibiotics. Another mechanism is the acquisition of resistance genes through horizontal gene transfer, natural transformation, and mutations. Tigecycline resistance in A. baumannii is complex and not completely understood, but it is an important mechanism of resistance. Colistin resistance can occur through various mechanisms, including modifications of target lipopolysaccharide (LPS), efflux of colistin from the cell, and heteroresistance. Additionally, A. baumannii can acquire or upregulate antibiotic resistance determinants through genetic mutations, leading to resistance to multiple classes of antimicrobial compounds.
What mechanisms do bacteria use to be more resistant to antibiotics?5 answersBacteria use various mechanisms to be more resistant to antibiotics. These include the development of resistance genes through mutations and evolution, horizontal gene transfer among bacteria, structural changes in the bacterial outer membrane, enzymatic processes, gene upregulation, adaptive resistance, biofilm formation, and the presence of mobile genetic elements (MGEs) that carry antimicrobial resistance genes (ARGs). Additionally, bacteria can modify their efflux pumps, toxin-antitoxin systems, regulatory small RNAs, signaling systems, and CRISPR systems to acquire resistance. The metabolic and virulence state of bacteria also play a role in resistance mechanisms. Understanding these mechanisms is crucial for controlling the development of resistance and developing new antimicrobial therapies.
Whole-genome sequencing(WGS) as a Tool for understanding virulence and antibiotic resistance genes5 answersWhole-genome sequencing (WGS) is a valuable tool for understanding virulence and antibiotic resistance genes. WGS allows for the identification and characterization of genomic determinants involved in antimicrobial resistance (AMR) and the distribution of virulence genes. By using WGS, researchers can gain insight into the genetic mechanisms of resistance and virulence, which can help in directing patient treatment and optimizing treatment guidelines based on local epidemiology. WGS can provide high-resolution identification of bacterial species and subspecies, allowing for accurate classification and differentiation. Additionally, WGS can detect and characterize specific resistance genes, providing information on the prevalence and types of antibiotic resistance in bacterial populations. Furthermore, WGS can identify and analyze virulence genes, shedding light on the potential pathogenicity of bacterial strains. Overall, WGS is a powerful tool for studying and understanding the genetic factors underlying virulence and antibiotic resistance in bacteria.
What are the mechanisms of antibiotic resistance in bacteria?5 answersAntibiotic resistance in bacteria is caused by various mechanisms. Bacteria can develop resistance through mutations and gene transfer, which allow them to exchange and exploit potential resistance genes. The misuse and overuse of antibiotics in industries and medical systems provide the ideal environmental stress for bacteria to develop resistance. Bacteria can develop defense mechanisms such as structural changes, enzymatic processes, gene upregulation, mutations, adaptive resistance, and biofilm formation. Mobile genetic elements (MGEs) play a role in the dissemination of antimicrobial resistance genes (ARGs). Other mechanisms include efflux pumps, toxin-antitoxin systems, regulatory small RNAs, quorum sensing, and CRISPR systems. Understanding these mechanisms is crucial for controlling the development of resistance and improving antimicrobial therapies. New strategies such as phage therapy and CRISPR-Cas precision therapy are being explored to combat multi-drug resistant bacteria.
What is Mechanism of resistance of antibiotics?5 answersThe mechanism of resistance of antibiotics involves various strategies employed by bacteria to defend against the effects of these drugs. One common mechanism is the acquisition of genetic mutations that allow bacteria to adapt and become resistant to antibiotics. Bacteria can also develop resistance through the transfer of genetic material, which confers resistance to specific antimicrobial agents. Additionally, exposure to stress conditions, such as antibiotics, can activate stress response mechanisms in bacteria, leading to changes in their susceptibility to antibiotics. Another mechanism involves the inhibition of bacterial cell wall biosynthesis, disruption of cell membrane integrity, suppression of nucleic acids and/or proteins synthesis, and disturbances of metabolic processes. Understanding these mechanisms is crucial for developing new drugs or drug combinations to combat antibiotic resistance.

See what other people are reading

Are there studies available which isolated Desulfovibrio piger from the environment?
4 answers
Desulfovibrio piger has been isolated from various environments, including the human gut and swine waste. Studies have shown its presence in human fecal samples, with a significant association with chronic liver disease. Additionally, Desulfovibrio piger has been identified as a common and abundant species in the human gut microbiome, positively correlated with beneficial genera and negatively associated with harmful ones, indicating a potential association with host health. Furthermore, Desulfovibrio species, including D. desulfuricans, D. piger, and D. legallii, have been isolated from human fecal samples using specific enrichment media, highlighting their importance in understanding gut microbiota and associated diseases. These findings collectively demonstrate the presence and isolation of Desulfovibrio piger in various environmental niches, emphasizing its role in both health and disease contexts.
How does the prevalence of carbapenem-resistant Enterobacterias vary across different countries in Latin America and the Caribbean?
5 answers
The prevalence of carbapenem-resistant Enterobacterales (CRE) varies across different countries in Latin America and the Caribbean. Studies show that in Latin America, the incidence of CRE has been increasing, with rates ranging from 22% in 2015 to 32% in 2020. Specifically, countries like Peru have reported the detection of carbapenemase-producing Enterobacterales (CPE) isolates, with the presence of the blaOXA-181 gene being a significant concern. Furthermore, data from the SMART Program in Latin America indicates that carbapenem-resistant isolates are prevalent, with Klebsiella pneumoniae being the main carbapenemase producer in most countries, except in Mexico, Panama, and Venezuela where Pseudomonas aeruginosa is more prominent. This highlights the regional variation in the prevalence of CRE across Latin America and the Caribbean.
Are urban pigeons source of drug resistance bacteria?
5 answers
Urban pigeons have been identified as potential carriers and spreaders of drug-resistant bacteria. Studies have shown that pigeons can harbor multidrug-resistant strains, including ESBL-producing Escherichia coli, Salmonella spp., Staphylococcus spp., Clostridioides difficile, and other pathogenic bacteria. These bacteria isolated from pigeons have exhibited resistance to various classes of antibiotics, such as beta-lactams, aminoglycosides, tetracyclines, and more. Additionally, genes associated with antimicrobial resistance, like blaCTX-M-15, blaCTX-M-27, blaSHV-12, blaVIM, and mcr-1, have been detected in these bacteria, raising concerns about public health implications. The presence of multidrug-resistant pathogens in urban pigeons near hospital environments further highlights the potential risk of these birds as a source of drug-resistant bacteria that could impact public health.
What different pathogens causes ventilator associated pneumonia around different parts of the world?
5 answers
Ventilator-associated pneumonia (VAP) is caused by various pathogens globally. Common pathogens include Staphylococcus aureus, Pseudomonas aeruginosa, Acinetobacter baumannii, and Enterobacteriaceae members. In India, studies have shown prevalent pathogens to be Acinetobacter baumannii, Klebsiella pneumoniae, and Pseudomonas aeruginosa. In COVID-19 patients, VAP is often caused by Gram-negative bacteria like Pseudomonas aeruginosa, Klebsiella pneumoniae, and Acinetobacter baumannii, with Staphylococcus aureus being the most common Gram-positive pathogen. Additionally, a study in Shanghai found that Acinetobacter baumannii, Klebsiella pneumoniae, and Pseudomonas aeruginosa were prevalent pathogens causing VAP. These findings highlight the diverse range of pathogens contributing to VAP globally, emphasizing the importance of tailored treatment strategies based on regional pathogen prevalence.
What is the difference in the implementation of antimicrobial management programs between different regions in Brazil?
5 answers
The implementation of antimicrobial management programs in Brazil shows regional variations. In the Northeast, the most used antibiotics in ICUs were piperacillin/tazobactam, while in the Midwest and South, it was meropenem, and in the Southeast, ceftriaxone was predominant. Factors influencing the implementation of Antimicrobial Stewardship Programs (ASP) in Brazilian hospitals included top management support, availability of clinical protocols, and support from doctors. A study in a teaching hospital in the Brazilian Northeast highlighted the importance of time management of treatment, antimicrobial discontinuation, and continuing education as key strategies in ASP implementation. Brazil's national antimicrobial surveillance program (BR-GLASS) revealed regional differences in antimicrobial resistance patterns, emphasizing the need for a nation-wide surveillance program. Cost-effectiveness studies in a university hospital in Brazil favored a Bundled Antimicrobial Stewardship Strategy, indicating its efficiency despite being more expensive.
How do microorganisms consume organic acids that lower TTA in flavoured soy yoghurt. explain the pathways?
5 answers
Microorganisms consume organic acids in flavoured soy yoghurt through various metabolic pathways. Lactobacillus casei YQ336, a predominant strain in acid slurry, produces organic acids that lower the pH of soy milk, facilitating coagulation of soy proteins. Additionally, microbial consortia like Lactobacillus bulgaricus and Streptococcus thermophilus enhance organic acid content in soy yogurts, promoting the growth of lactic acid-producing bacteria. Furthermore, modifications in microorganisms, such as reducing AcsA activity, increase tolerance to organic acids like lactic acid, enabling enhanced production of these acids. The consumption of soy yoghurt fermented with Enterococcus faecium CRL 183 leads to alterations in the composition and metabolic activity of intestinal microbiota, potentially reducing enzymes like β-glucuronidase involved in the metabolism of carcinogenic compounds. These pathways collectively demonstrate how microorganisms interact with organic acids in flavoured soy yoghurt.
Is lactose fermentation test and gram staining same?
4 answers
Lactose fermentation testing and Gram staining are distinct laboratory procedures used in microbiology. Lactose fermentation testing involves assessing the ability of bacteria to ferment lactose, a sugar, which can aid in bacterial identification based on metabolic characteristics. On the other hand, Gram staining is a technique used to differentiate bacteria based on their cell wall composition, categorizing them as either Gram-positive or Gram-negative. While lactose fermentation testing provides information on bacterial metabolic pathways, Gram staining offers insights into the structural properties of bacterial cells. Both tests serve different purposes in bacterial identification and characterization, with lactose fermentation focusing on metabolic activity and Gram staining on cell wall characteristics.
How to isolation staphylococcus epidermidis in acne skin?
5 answers
To isolate Staphylococcus epidermidis in acne skin, samples can be collected from acne lesions for culture. The specimens can be cultured on specific agar plates like trypticase soy agar (TSA) and mannitol salt agar to isolate suspected colonies. Identification of the isolates can be done through biochemical tests such as catalase, coagulase, oxidase, and Gram staining. In cases of acne patients, Staphylococcus epidermidis was found to be a dominant bacterium. Additionally, the prevalence of Staphylococcus epidermidis in acne patients was reported to be around 27.08% aerobically. By following these methods and utilizing the Vitek-2 compact system for examination, Staphylococcus epidermidis can be successfully isolated from acne skin samples.
What are treatments for entamoeba coli infection?
5 answers
Entamoeba coli infection is typically asymptomatic and does not require specific treatment. However, if treatment is deemed necessary, drugs like paromomycin and diloxanide furoate are recommended for asymptomatic cases. In the case of Entamoeba histolytica infection, which can cause severe complications like colitis and liver abscesses, treatment involves a combination therapy with luminal agents (paromomycin, diloxanide furoate, iodoquinol) and tissue amoebicides (metronidazole, tinidazole). Additionally, probiotics like Lactobacillus casei and Enterococcus faecium have shown promise in reducing Entamoeba proliferation, providing a potential cost-effective prophylactic treatment without overusing antibiotics. It is essential to continue research for novel therapeutics to combat parasitic infections and improve treatment outcomes for amoebiasis.
How acidifiers aid in swine performance?
5 answers
Acidifiers play a crucial role in enhancing swine performance by improving growth, antioxidant activity, microbiota balance, and overall health. Acidifiers, such as formic acid and its salts, have shown promising results in promoting gut health and growth performance in pigs. Studies have demonstrated that supplementing drinking water with acidifiers can lead to improved growth performance, antioxidant capacity, and survival rates in weaned pigs. Acidifiers have also been found to reduce bacteria presence in feed and enhance the diversity of gastrointestinal microbiota, contributing to better health outcomes in swine. Additionally, acidifiers containing short-chain fatty acids have been shown to modulate the microbiota and improve feed efficiency in piglets.
How effective are the current antimicrobial strategies for the management of acute lymphoblastic anaemia (ALL) in children?
5 answers
Both conventional antibiotics and novel therapeutic approaches play crucial roles in managing acute lymphoblastic leukemia (ALL) in children. Antibiotic prophylaxis, including fluoroquinolone use in afebrile patients, has shown a significant reduction in bacteremia rates during induction therapy for ALL. Chemotherapy remains the primary treatment for ALL, with intensive rounds yielding superior outcomes, although resistance and toxicity remain concerns. Nanoparticles are being explored to enhance drug delivery, potentially improving efficacy and reducing toxicity in ALL treatment. Additionally, risk-adapted treatment approaches based on molecular genetic characterization have minimized therapy complications and late effects, with ongoing efforts to enhance cure rates, including immunotherapeutic strategies in clinical trials. Overall, a combination of traditional antibiotics, chemotherapy, and innovative therapies is essential for effectively managing ALL in children.