Articles tagged with Bacterial Pathogens
A study identified a genetic risk factor for typhoid fever that targets bacterial virulence and cholesterol metabolism. The VAC14 gene variant reduces the ability of Salmonella Typhi to invade human cells, suggesting a potential preventive approach with cholesterol-lowering drugs.
A team of researchers found a new quorum-sensing molecule that increases the virulence of P. aeruginosa by activating RhlR independently of C4-HSL. This discovery offers potential for developing novel antimicrobial drugs to treat serious infections caused by this bacterium.
Researchers have identified a rare genetic mutation in Ureaplasma parvum that renders it resistant to levofloxacin, a commonly used antibiotic for treating urinary tract infections. This mutation limits treatment options for women with UTIs caused by this pathogen.
Researchers at the University at Buffalo have discovered a novel combination of aztreonam, amikacin, and polymyxin B that is capable of eradicating the deadly E. coli bacterium carrying mcr-1 and ndm-5 genes. The triple combination was found to eliminate the bacteria within 24 hours and prevent regrowth.
Researchers at Vanderbilt University have discovered that sugars in human milk possess antibacterial properties and can enhance the effectiveness of proteins, making them a potential new source of antimicrobial agents. The study found that these compounds can kill bacteria directly or break down biofilms to protect themselves.
Researchers have discovered that certain sugars in breast milk can act as anti-biofilm agents, helping prevent GBS infection in infants. The study suggests these sugars could potentially become part of an antibacterial treatment for infants or adults.
Researchers found that peroxisomes are essential for cells to detect and destroy bacterial infections, releasing signals to other organs. This discovery highlights the organelle's role in innate immunity and could inform strategies to combat bacterial infections.
A discovery by a UQ-Columbia University-University of Washington research group has explained the regulation of pyruvate carboxylase enzyme in Lactococcus bacterium, crucial for efficient milk acidification and cheese production. The findings have significant implications for Australia's billion-dollar cheese industry.
The study reveals that bacterial defense mechanisms are highly organized in response to nutrient stress, but become disorganized when faced with antibiotics. The researchers used experimental and computational methods to understand the workings of the bacterial defense system.
The study found that specially designed plastic films with N-halamines can prevent bacterial contamination by killing bacteria on contact. The plastic films work by releasing chlorine to sanitize surfaces, making them ideal for use in food processing operations and hospital environments.
Researchers have found a way to make plants resistant to the bacterial pathogen Xanthomonas oryzae oryzae that causes rice blight. The team discovered that blocking the pathogen's access to sugar stores in plants can starve them out, preventing multiplication.
Researchers created a small molecule that inhibits the formation of biofilms on tooth surfaces, reducing dental caries in rats fed a caries-promoting diet. The inhibitor blocks a key virulence enzyme, making it unable to stick to tooth surfaces and produce lactic acid.
Researchers from Eindhoven University of Technology and Queen's University have detailed the structure of a 600-nanometer protein in an Antarctic bacterium, revealing its role in gripping onto ice surfaces. The discovery has potential applications in preventing pathogenic bacteria from attaching to human cells.
Researchers at Kansas State University are developing new treatments for E. coli by inhibiting the activity of NleB, a protein that contributes to bacterial virulence. The study resolves an ongoing debate about the protein's function in different strains of E. coli.
A study found that bacteria's past adaptation to antibiotics influences their evolutionary dynamics of multi-drug resistance. The researchers used Pseudomonas aeruginosa and sequenced the bacteria's genomes to understand the genetic basis for resistance.
Researchers used DNA sequencing to identify patients at risk of death from MRSA infections, predicting survival chances with high accuracy. The study found that different strains of MRSA kill patients in distinct ways, shedding light on the pathogen's deadly mechanisms.
A study published in mSphere reveals that three Klebsiella species can cause severe infections in hospital patients, with all three sharing genes that confer resistance to commonly used antibiotics. This finding expands the understanding of Klebsiella infections and highlights the need for new treatments.
Researchers discovered anthrax prevalent among Taï National Park's mammal carcasses, killing 31 of 55 chimps. The disease poses a significant threat to endangered species and emphasizes the need for long-term infectious disease studies.
Researchers at Vanderbilt University Medical Center have developed a new light-based therapy to kill antibiotic-resistant bacteria, such as MRSA. The therapy uses a small molecule to activate an enzyme that produces reactive oxygen species, killing the bacteria when exposed to specific wavelengths of light.
Researchers found that Fusobacterium nucleatum in the gut can stop chemotherapy from causing apoptosis, a type of cancer cell death. The bacterium activates autophagy, a cell-survival mechanism that protects cancer cells from destroying themselves.
Researchers at UT Southwestern Medical Center have discovered a link between the backup immune defense system and mutation seen in Crohn's disease. The study found that a backup pathway uses autophagy's cellular machinery to deliver protein weapons to the cell surface, making it more effective against bacterial attacks.
E. coli bacteria hijack trace amounts of copper in the body to fuel growth and reproduce, a finding that could lead to new treatments for hard-to-treat UTIs. The 'nutritional passivation' strategy involves binding to metals like nickel, cobalt, and chromium to bring in controlled amounts of essential nutrients.
A Wayne State University researcher has received a $1.9 million grant from the National Institutes of Health to study the role of AMP-activated protein kinase in regulating innate responses to bacterial endophthalmitis. The study aims to identify novel pathways and new means to treat blinding ocular infections.
A subspecies of the bacterium Streptococcus gallolyticus actively promotes the development of colorectal cancer by driving CRC cell proliferation through β-catenin cell signaling. The study found that infected mice developed more tumors and greater β-catenin production than control mice.
Researchers developed a human lung tissue model to study pneumonia and found that viral pathogens inhibit the immune system's ability to fight bacterial infections. A new drug-based treatment was tested, which inhibits tyrosine kinase-2, restoring the immune system's ability to combat bacterial pathogens.
A recent study by Nationwide Children's Hospital scientists has identified a new method by which nontypeable Haemophilus influenzae builds its biofilms, resulting in improved therapeutic options for respiratory diseases such as sinusitis and pneumonia.
Researchers found that Corynebacterium mastitidis lives on the eyes of laboratory mice and helps them fend off pathogenic microbes. The bacteria stimulates a local immune response, keeping it under control while preventing harmful infection.
A resident ocular microbiome, including bacteria like Staphylococci and Corynebacterium mastitidis, trains the developing immune system to fend off pathogens. This microbe induces the production of interleukin-17, a signaling protein critical for host defense.
The study used a specialized surface with hydrophobic and hydrophilic regions to measure the adhesive force of bacterial cells. The researchers found that the diameter of the contact area was typically tens to hundreds of nanometers, but had no effect on adhesion strength.
Researchers found genetically diverse strains of C. difficile in soil samples from children's and dogs' sandboxes in Madrid. The presence of certain strains with increased toxin production poses a significant threat to human and animal health.
Currently available drugs may be used alone or in combination to treat infectious diseases, addressing a pressing need due to slow development of new therapies. Non-profit entities and private industry collaboration is crucial for discovering novel interventions to combat drug-resistant pathogens.
Researchers developed silver-silica nanoparticles with an ampicillin coating that target antibiotic-resistant bacteria while being inert to human cells. The nanoantibiotic showed efficacy against both resistant and non-resistant strains of E. coli, offering a promising strategy for combating drug-resistant infections.
New research reveals that bacteria in fruit flies use a arsenal of toxins to defend against parasitic wasps, specifically targeting their ribosomes. The study found that the bacteria produce ribosome-inactivating proteins (RIPs) that attack and disable the parasite's ribosomes.
Researchers found that wastewater-exposed rainbow darters had increased metabolic rates, suggesting they were under stress from environmental conditions. The presence of pathogenic bacteria in these fish was also linked to human infections such as food poisoning.
Researchers have discovered that guanylate-binding proteins, such as human GBP1, play a crucial role in bringing together membrane blebs to trap pathogens. This process is a precursor to vesicle fusion, which is essential for the immune defense mechanism.
Researchers at the University of Lincoln have produced highly potent and simplified forms of teixobactin, which defeats multi-drug resistant infections like MRSA. The breakthrough comes after pinpointing exactly which amino acid makes teixobactin successful at killing off harmful bacteria.
Researchers have developed tiny microbots that can remove up to 80% of pathogenic bacteria from contaminated water. The microbots use hydrogen bubbles propelled by magnesium and silver nanoparticles to kill bacteria, offering a potential solution to the global clean water crisis.
Researchers have found that some pathogenic bacteria use an undulating 'wave-pattern' to mark future sites of division, instead of conventional biological systems. This discovery provides new insights into how these bacteria divide and could lead to new ways to fight them.
Scientists have visualized bacterial microcompartment shells at atomic level resolution, revealing their structure and function. This breakthrough opens the door to identifying vulnerable targets for combating pathogenic bacteria and developing new kinds of designer nanoreactors.
Researchers at Lawrence Berkeley National Laboratory and Michigan State University have imaged the protein shell of a bacterial microcompartment at atomic resolution. The study provides the first picture of an intact bacterial organelle membrane, which could help in fighting pathogens or engineering beneficial organisms.
Researchers at UT Southwestern Medical Center found that Vibrio parahaemolyticus bacteria deploy a needle-like apparatus called Type III Secretion System (T3SS) to inject toxic proteins into cells, disabling their ability to produce defensive molecules like reactive oxygen species. This allows the bacteria to escape the gut and cause l...
Researchers found that mucosa-associated invariant T (MAIT) cells can mount a rapid and robust inflammatory response to bacterial superantigens, contributing to severe organ damage or death. The overzealous response leads to exhaustion of MAIT cells, resulting in immunosuppression and increased susceptibility to secondary infections.
Researchers at Tel Aviv University develop new DNA delivery technology to neutralize lethal activity of drug-resistant bacterial pathogens. The innovation expands the range of bacteriophages, enabling manipulation and potentially leading to the development of new drugs.
Researchers from Queensland University of Technology found that airborne pseudomonas aeruginosa bacteria can remain viable in the air for up to 45 minutes after being expelled by human coughs and sneezes. This could have significant implications for infection control in hospitals, particularly for patients with cystic fibrosis.
Researchers discovered that the pathogen Francisella tularensis uses a nano-machine called type VI secretion system (T6SS) to disrupt digestive vesicles and escape into the cytosol, allowing it to rapidly replicate. This efficient defense mechanism is crucial for the bacterium's success in an infection.
Researchers at Technical University of Denmark discover that resistance genes originate from the same group as antibiotics, Actinobacteria. The study reveals a new mechanism called 'carry back', where pathogens acquire genes through a primitive form of bacterial sex.
Researchers have discovered that a gene called Mt2 in Wolbachia-infected mosquitoes produces an enzyme that blocks the transmission of deadly diseases. The study suggests that this mechanism can be replicated without Wolbachia, potentially opening new avenues for disease control without releasing modified insects into the wild.
A study found that 37% of heater-cooler units tested positive for the bacterium Mycobacterium chimaera, which can cause fatal infections. The devices, used in over 60% of heart bypass procedures in the US, can contaminate patient blood and organs during surgery.
A newly discovered natural antibiotic produced by bacteria from a cystic fibrosis patient could potentially be used to combat drug-resistant tuberculosis. Lab testing showed that the compound, gladiolin, is stable and effective against four drug-resistant TB strains.
A new study published in Cell Host and Microbe has uncovered the immune mechanism driving diarrhea and its role in pathogen clearance. Researchers found that diarrhea resulting from the signaling of specific molecules helps promote pathogen clearance and limit disease severity.
A team of researchers has identified novel structures on bacteria using high magnification imaging, revealing a wealth of unknown information about well-studied species. The discovery is expected to lead to improvements in medicine, environmental science, and multiple additional fields where bacteria play a critical role.
Researchers have developed a new method to control fire blight by using a genetically modified bacteriophage (Y2) that can dissolve the slime layer protecting the Erwinia bacteria and kill it. Additionally, another variant of Y2 has been engineered to detect Salmonella by emitting light when bound to infected bacteria.
A new OpenArray system offers simultaneous detection of multiple viruses, bacteria, and protozoan pathogens in human blood samples, demonstrating a promising tool for flexible and accurate blood screening. The device was tested with 92 donor samples and showed 95% accuracy in identifying virus-positive samples.
A study found that Porphyromonas gingivalis, a common periodontal pathogen, may delay conception in young women. The bacteria were more frequently detected in saliva among women who did not become pregnant, and higher antibody levels were also associated with conception delays.
Researchers found that gut bacteria can limit Listeria growth and prevent infection in immunocompromised mice. Probiotic bacteria species were identified as protective against Listeria infections in laboratory cultures.
A study found that Lactobacillus parafarraginis isolated from commercial yogurt inhibited the growth of several multidrug-resistant bacterial pathogens. The bacteriocin-like peptide responsible for this inhibition is heat stable and may hold promise as a therapeutic agent.
A team of researchers at Kiel University has developed a new strategy to combat multi-resistant pathogens by identifying which antibiotics can lead to increased susceptibility to other drugs. This concept, known as 'collateral sensitivity', offers hope in the fight against antibiotic resistance.
Researchers found that Mycobacterium tuberculosis inhibits a key signaling pathway in human white blood cells, leading to increased production of MMP-1, which destroys lung tissue. The study suggests that this mechanism may drive disease progression and increase infectiousness.
A new study from McMaster University found that ethnicity and breastfeeding practices independently affect the gut microbiota in infants as young as one year old. The research revealed a higher abundance of lactic acid bacteria in South Asians and Clostridia in white Caucasians, suggesting potential links to future health issues such a...
Shigella uses multiple mechanisms to resist bile salts in the small intestine, including antibiotic resistance and increased virulence gene expression. The formation of protective biofilms allows the bacteria to survive transit through the small intestine and infect tissues in the colon.