Articles tagged with Antibiotic Resistance
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Researchers successfully synthesized a novel vancomycin analogue with enhanced binding ability, showing promise in treating vancomycin-resistant infections. The new compound could potentially lead to the development of more effective antibiotics against these resistant strains.
Researchers discovered that bacteria can export molecules similar to communication signals, blocking the effectiveness of drugs. This process, called quorum sensing, allows bacteria to evade treatment and develop resistance to multiple drugs, making infections harder to treat.
Researchers genetically engineered E. coli to lack its outer protective layer, making it more vulnerable to antibiotics. Synthetic versions of natural substrates for gram-positive bacteria's membrane formation are also being developed, potentially leading to new antibiotic designs.
Researchers screened 480 strains of soil bacteria for resistance to 21 antibiotics and found that all were multi-drug resistant. The study suggests that studying resistance in the soil can help predict future clinical problems and guide the development of new therapies.
A team of scientists discovered a massive genomic island containing a large number of antibiotic resistance genes in the A. baumannii bacterium, which has become a major public health concern globally. The island was found to contain new and previously unknown resistance genes that have enabled the bacterium to acquire resistance quickly.
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) and other drug-resistant bacteria has been increasing in intensive care units nationwide. Researchers found a decrease in MRSA strains resistant to multiple drugs, which they attribute to community MRSA strains replacing hospital-associated strains.
A clinical decision system (CDSS) helped decrease inappropriate antimicrobial prescribing rates by 10% in communities with the intervention. The CDSS tool guided diagnosis and management of acute respiratory infections, reducing the use of macrolides and antibiotics for viral respiratory tract infections.
The prevalence of drug-resistant gonorrhoea is increasing in South Africa, with reports of treatment failure coinciding with the emergence of ciprofloxacin-resistant isolates. The country's health department has been urged to take action and conduct nationwide surveillance to assess the extent of the problem.
A review by Stephen Gillespie and Philippe Gay finds no evidence of antibiotic resistance from GM crops being transferred to bacteria, which would be dwarfed by the impact of human antibiotics use. The authors conclude that while it's possible for transfer to occur, its contribution to antibiotic resistance is low.
Researchers discovered four mutations that increase the efficiency of a bacterial enzyme rendering penicillin and cephalosporin antibiotics useless. The mutations influenced the enzyme's active site, allowing it to survive on a drug dose 64 times higher than the original enzyme.
Researchers found DDT-resistant fruit flies confer a two-fold advantage when inheriting the resistance gene, allowing them to thrive even without pesticide use. This discovery has implications for antibiotic resistance in bacteria, suggesting measures may not halt its spread.
Research by University of Bath scientists shows that DDT resistance confers an advantage when inherited through females, leading to its global spread. This discovery challenges the common assumption that genetic resistance always carries a fitness cost.
A new study shows that taking antibiotics within two months increases the likelihood of developing resistant bacteria. GPs are responsible for most antibiotic prescriptions in the UK, but may underestimate the individual risk.
California continues to experience cases of multi-drug resistant tuberculosis (MDR-TB), which requires prolonged treatment and poses significant public health risks. The majority of MDR-TB cases are foreign-born, highlighting the need for international TB control measures.
Researchers at Scripps Institute find a protein called LexA promotes mutations in bacteria, enabling them to evolve resistance to antibiotics. By inhibiting this protein, the bacteria's ability to evolve can be halted, potentially prolonging the potency of existing antibiotics.
Two studies document a significant rise in superbugs, including methicillin-resistant Staphylococcus aureus (MRSA), affecting people worldwide. The prevalence of MRSA has more than doubled, with 76% of community-acquired isolates being resistant to antibiotics.
Researchers propose that antibiotic-mediated DNA damage triggers a bacterial repair mechanism, increasing the likelihood of mutations leading to antibiotic resistance. Blocking this pathway could provide a promising strategy for controlling the spread of superbugs.
Researchers at Yale University have identified a key mechanism behind antibiotic resistance in bacteria. By analyzing the structural changes caused by a single nucleotide mutation, they found that this alteration reduces the ability of antibiotics to bind to ribosomes, allowing resistant bacteria to rapidly cause infections.
Scientists have made significant progress in understanding how bacteria develop resistance to antibiotics, including macrolides and lincosamides. The study revealed new details about the structural basis of drug resistance and identified potential targets for developing new hybrid antibiotics.
A five-year study in Mexico found that the Directly Observed Therapy (DOTS) strategy significantly reduced drug-resistant TB transmission. The results showed a decline from 22% to 7.8% of new patients carrying drug-resistant strains, with no cases of multiple-drug resistance.
Researchers have identified a missing enzyme in M. tuberculosis that plays a crucial role in the bacterium's ability to acquire iron through mycobactin synthesis. This discovery highlights the importance of understanding the iron scavenging pathway in TB and provides new avenues for developing effective anti-TB drugs.
The introduction of the pneumococcal conjugate vaccine led to significant reductions in invasive pneumonia rates, with a 71% decrease in children aged 2-4 years and an 82% decrease in those under 2. The vaccine also showed herd immunity effects, reducing antibiotic resistance in adults who did not receive the vaccine.
A study published in Nature Structural & Molecular Biology has uncovered the structure of resuscitation promoting factor (Rpf), a key player in TB bacteria. The discovery holds promise for developing new methods to 'wake-up' dormant bacteria, allowing antibiotics to kill and cure the disease.
A randomized trial found that 3-day regimens of amoxicillin-clavulanate were less effective than ciprofloxacin in treating acute uncomplicated cystitis in women. Amoxicillin-clavulanate was also less effective among susceptible bacterial strains, highlighting the need for alternative treatments.
Despite advances in molecular biology, microbes have outpaced pharmaceutical companies in developing resistance to antibiotics. Dr. Julian Davies highlights over 300 known genes that confer resistance, and notes the need for a deeper understanding of microbial evolution.
A study found significant variations in antibiotic use across European countries, with higher rates in southern and eastern regions. The research suggests that population-based studies are needed to understand the motivations behind antibiotic use and develop effective strategies to reduce resistance.
Evolutionary adaptation leads to permanent antibiotic resistance in fungi, making it difficult to prevent its spread. Researchers focus on reducing dependence on antibiotics to combat this growing issue.
A new quick test has been developed to detect drug-resistant strains of gonorrhea by identifying genes linked to resistance in urine samples or leftover products from other diagnostic techniques. The test uses probe technology to simplify analysis of samples that cannot be used for culturing organisms.
A study found that women treated with clindamycin for bacterial vaginosis experienced more frequent increases in E. coli concentrations and higher rates of clindamycin-resistant bacteria compared to those treated with metronidazole. In contrast, metronidazole therapy resulted in increased colonization by protective Lactobacillus species.
Paratek Pharmaceuticals has demonstrated disease protection in preclinical studies using non-antibacterial tetracycline compounds, which have no detectable antibacterial activity. These compounds show efficacy comparable to minocycline in reducing limb paralysis in the EAE model of MS.
Researchers found no statistically significant increase in antimicrobial resistance among patients with CRS over time. In fact, many patients showed reversion to lesser degrees of resistance, suggesting a possible decrease in antimicrobial use and its impact on resistance patterns.
Researchers at St. Jude Children's Research Hospital have uncovered the structure of an enzyme that produces folate, a nutrient essential for bacterial survival. The team created images of the molecular structure using X-ray crystallography and discovered a new target for drugs that could avoid antibiotic resistance in anthrax bacteria.
A new study by the European Union shows that group A streptococci (GAS) infections are more common than previously thought, with an estimated 18-20,000 cases per year across the EU. The study also reveals a higher number of different bacterial types, with nearly 200 types currently identified, and potential antibiotic resistance issues.
A new model shows that antibiotic cycling, alternating between classes of antibiotics every few months, probably won't work in stopping the spread of hospital-acquired antibiotic resistance. Instead, a mixing approach, where patients receive different antibiotics randomly, may be more effective in reducing resistance levels.
A recent study challenges previous fears that triclosan contributes to antibiotic resistance. Researchers found only two types of bacteria, E. coli and Klebsiella, developed resistance to triclosan in a laboratory setting.
A recent study suggests that surgery provides a favorable outcome for long-term multidrug-resistant tuberculosis patients. The surgeons at the National Jewish Medical and Research Center have extensive experience in treating mycobacterial lung disease, making them uniquely qualified to assess individual patient risk/benefit balances.
Walsh's research on vancomycin resistance and bacterial synthesis has significant implications for future drug development. His work highlights the importance of understanding microbial virulence mechanisms to combat growing antibiotic-resistant threats.
Research reveals integrons in poultry litter generate clusters of varied antibiotic resistance genes, complicating efforts to control spread. The discovery has significant implications for farm animal operations, human health, and the development of new antibiotics.
Researchers used genetically modified yeast to pinpoint mutations responsible for antibiotic resistance in Pneumocystis jirovecii, a pathogen causing severe pneumonia. The study reveals potential targets for designing new drugs to prevent resistance.
A study found that 70% of intensive care patients were colonized with bacteria from other patients in the unit. The researchers identified multiple strains of Staphylococcus bacteria that were resistant to various antibiotics, highlighting the need for improved infection control and antibiotic use guidelines.
Researchers in Switzerland discovered a high level of antibiotic resistance in Campylobacter bacteria, which causes 5-14% of diarrheal illnesses globally. The study found that 59% of isolated strains were sensitive to all tested antibiotics, while some were resistant to multiple antibiotics, posing concerns for public health.
A randomized trial found that surgical decontamination (SDD) significantly reduces mortality in ICU patients by lowering antibiotic-resistant bacteria infections. SDD is recommended for patients on mechanical ventilation or in ICUs with low vancomycin-resistant enterococcus and meticillin-resistant S aureus prevalence.
The UK is experiencing an increased rate of gonorrhoea infection due to growing antibiotic resistance, particularly with ciprofloxacin. The Health Protection Agency recommends reviewing national and local treatment guidelines to ensure effective treatment using alternative antibiotics such as cephalosporins or spectinomycin.
Researchers at NYU Langone Health have found that the new antibiotic linezolid is effective against multidrug-resistant tuberculosis (TB), a disease that affects millions worldwide. The drug was administered to five patients who had run out of other treatment options, and all showed significant improvement.
A study of 38 households found no significant difference in bacterial numbers with or without antibacterial products, but high bacteria counts were detected on kitchen sponges and sink drains. The researchers suggest that prolonged antibacterial use may promote antibiotic resistance.
A study published in Annals of Internal Medicine found that Canadian guidelines for treating community-acquired pneumonia were not followed in 50% of cases. The lack of clear guidelines leads to difficulties in choosing the right antibiotic, increasing the risk of antibiotic resistance and patient death.
Antibiotic prescriptions decreased for common cold and respiratory infections, but broad-spectrum use increased, posing a threat to public health. The misuse of broad-spectrum antibiotics contributes to the creation of resistant bacteria strains.
A community-based care model has been shown to be effective in treating multidrug-resistant tuberculosis (MDR-TB) in resource-poor nations. The study found that 83% of patients who completed at least four months of therapy had probable cures, exceeding the best reported U.S. cure rate.
Research explores whether animal antibiotics contribute to rising human resistance rates. The study finds that animal antibiotics can indeed fuel human antibiotic resistance, highlighting the need for stricter regulations on their use.
A new antibiotic, fosmidomycin, has been shown to be effective against the Plasmodium falciparum parasite, with rapid parasite elimination and fever reduction. Cure rates after two weeks were 89%, 88%, and 60% for treatment durations of 5, 4, and 3 days, respectively.
The TRUST 2002 study found high resistance rates to penicillin (18.4%) and azithromycin (27.5%), but low levofloxacin resistance (<1%). Levofloxacin's minimal inhibitory concentrations did not correlate with those of other antibiotics.
A recent UCSF-led study found that fluoroquinolones were widely prescribed to patients discharged from the hospital despite narrow-spectrum antibiotics being appropriate. The study highlights the serious erosion of effectiveness due to overuse and increasing bacterial resistance, particularly in cystic fibrosis patients.
A phase II study of 100 patients with previously untreated HIV found that kaletra held the virus at undetectable levels for four years, with 72% maintaining suppressed viral loads. The results suggest that Kaletra remains a crucial option for initial therapy, helping to prolong time to resistance development.
Regular cranberry juice consumption could reduce UTI development and need for antibiotics, potentially slowing antibiotic resistance. Cranberry's anti-adhesion properties prevent bacteria from sticking to the urinary tract.
Researchers found that mupirocin antibiotic ointment can significantly reduce the rate of Staphylococcus aureus surgical wound infections in patients undergoing elective surgery. The study's results have significant implications for reducing hospital-based infections and preventing illnesses, especially in vulnerable populations.
Researchers discovered that ramoplanin effectively targets bacteria's ability to build cell walls, dodging common mechanisms of mutational resistance. This finding could lead to the development of new classes of antibiotics for treating drug-resistant infections.
Brenda A. Wilson's research explores Pasteurella multocida toxin's mechanism, revealing its impact on Gq protein and cell damage. The discovery could lead to new strategies for treating toxin-mediated diseases.
Researchers create model that accurately reproduces natural evolution and predicts how bacteria will become resistant to antibiotics. The model shows promise as a possible tool for creating new drugs that can evade bacterial adaptation.
Researchers found men had a higher incidence of bacterial pneumonia, with complex cases and higher mortality rates compared to women. The burden of CAP is expected to increase substantially as the elderly population grows, with projected 750,000 cases in 2010 and 1 million by 2020.
A global white paper on bacterial resistance in respiratory tract infections calls for concerted international action to tackle the growing threat of antibiotic-resistant bacteria. The initiative aims to implement robust surveillance, education, and patient involvement to control resistance.