Articles tagged with Bacterial Pathogens
Research reveals typhoid toxin promotes long-term colonization without disease in infected hosts, reducing intestinal inflammation and altering gut microbiome. Chronic infection was not linked to cancer development, highlighting a novel immune modulating role for the toxin.
Researchers used electron cryotomography to visualize bacterial 'motors' in three dimensions, revealing the complexity of type IVa pilus machine and flagellum structures. The study provides insights into pilus assembly, structure, and function, as well as correlations between motor strength and torque-generating protein complexes.
Research finds that botulism in waterbirds is spread by an invasive species of freshwater snail carrying Clostridium botulinum, which thrives in polluted wetlands. Global warming is expected to exacerbate outbreaks due to increased temperatures and drought.
Researchers propose using 'sticky molecules' like IgA to target good bacteria in the gut, preventing pathogenic species from taking hold. This approach has the potential to reduce inflammation and prevent diseases such as Crohn's and ulcerative colitis.
Researchers at Osel have engineered Lactobacillus jensenii to stably express broadly neutralizing antibody fragments against the HIV-1 virus, offering a cost-effective and long-lasting new barrier to HIV-1 transmission. The engineered bacteria reduced vaginal HIV transmission in a primate animal model by over 63%.
Researchers identified a human enzyme called fibrillarin as crucial for henipavirus infection, suggesting it as a potential therapeutic target. The study's findings have implications for the development of an anti-henipavirus drug, and may also offer broader use against other paramyxoviruses.
A new study reveals that bacteria in biofilm form are stronger than single-celled bacteria and outcompete them for nourishment. This challenges the traditional view of bacterial infections and highlights the importance of treating biofilms as a distinct entity.
A large-scale genomic study found that the Shigella dysenteriae pathogen, responsible for life-threatening bloody diarrhea, originated in Europe. The bacterium was transmitted to other continents via human migration and military operations, leading to devastating epidemics worldwide.
Research shows that aging alters antibody responses to oral bacteria, with significant positive correlations observed across the population. Specifically, antibody levels to Porphyromonas gingivalis and Treponema denticola increased with age, while those to Aggregatibacter actinomycetemcomitans did not.
Macrophages produce antimicrobial substances and fatty acids during activation to combat pathogens, contrary to previously assumed metabolism. The study provides a new approach for treating chronic inflammatory diseases by targeting the production of pyruvate in the citric acid cycle.
Researchers found that all ticks contained symbiotic bacterial species, while over half were infected with multiple pathogens. The study highlights the importance of accounting for interactions between symbionts and pathogens in tick-borne disease diagnosis and treatment.
Scientists at Umea University have discovered chemical compounds that attenuate Listeria monocytogenes virulence without killing the bacteria, reducing resistance risks. The findings provide a promising platform for developing new antimicrobial strategies against this foodborne pathogen.
The gut microbiome remains healthy due to functional redundancy among microbe species, which ensure stability in the face of constant disturbance. This study highlights the importance of understanding the role of these bacteria in the human body and their contribution to clinical symptoms.
Researchers developed compound inhibitors that target ribosomes in the translation phase of a virulent bacteria's genetic process. These compounds halt the bacterial rescue operation, making it difficult for the bacteria to grow and proliferate. The study's findings offer new hope against biowarfare agents and resistant pathogens.
A study by Ohio State University found that PulseNet, a CDC-coordinated network, prevents about 276,000 cases of foodborne illness each year. The network's early detection capabilities and encouragement of safer business practices contribute to this significant reduction in illnesses.
Researchers discovered that volatile compounds from Pseudomonas aeruginosa stimulate the growth of Aspergillus fumigatus, a fungus found in lung infections. The most potent signal was dimethyl sulfide, which is taken up by the fungus to support growth.
Researchers discovered novel bacteria species in shower hoses of a US hospital, closely related to known opportunistic pathogens. The presence of antibiotic resistance genes raises concerns about the potential health implications for immunocompromised patients.
The NIFA-NSF Joint Plant-Biotics Interactions program supports research on plant-biotic interactions, focusing on fundamental mechanisms and translational efforts. Funding is available for projects addressing agriculture and relevance to plant health, with applications due in June and April.
The Massachusetts General Hospital research team discovered a crucial interaction between intermediate filaments and the Shigella injection protein IpaC, required for efficient delivery of effector proteins into host cells. This finding suggests that similar mechanisms may apply to other pathogens using type 3 secretion systems.
E. coli bacteria attach to the surface of the urinary tract via protein FimH, binding more tightly under flow conditions. This discovery could lead to development of FimH antagonists, reducing antibiotic use and resistance.
Researchers found that strains resistant to bacteriocins grew poorly in iron-poor environments, suggesting a potential advantage in targeting resistant bacteria. The study suggests that bacteriocins could be used to target specific strains of multidrug-resistant or highly virulent bacteria.
Scientists are studying graphene oxide to create bacteria-killing catheters and medical devices, reducing the need for antibiotics and speeding recovery times. Graphene oxide wraps around bacteria, puncturing its membrane and killing it, making it a potential alternative to traditional methods that are toxic to the environment.
Researchers found a promising adjuvant, chitosan, induces immune response through a DNA-sensing pathway in cells. This discovery provides a roadmap for developing vaccines that trigger 'cell-mediated immunity',
A new study found that El Niño events transport waterborne diseases like cholera thousands of miles across oceans. The research suggests links between organisms causing illnesses in Asia and those emerging in Latin America.
Duke University researchers have engineered microbes that can't run away from home; those that do will quickly die without protective proteins produced by their peers. The system could be used to reliably program colonies of bacteria to respond to changes in their surrounding environment, such as releasing specific molecules on cue.
Researchers found bacteria can recognize and disrupt viruses using a novel RNA-based defense mechanism. This discovery could lead to improved ways to prevent crop diseases and dairy industry infections, and may inspire new gene-editing techniques.
Researchers at Arizona State University have developed a simpler method to produce antibodies against a range of infectious agents using DNA-based genetic immunization. The technique successfully expressed membrane proteins in mice and induced the animals to produce critical antibodies to bacterial and viral targets.
Scientists at Université de Genève found a novel regulatory mechanism in the HigBA toxin-antitoxin system that can selectively kill bacteria when they suffer from DNA damage. This discovery could lead to new treatments for bacterial infections by forcing bacteria to turn their weapons against themselves.
A new Penn study reveals that fish induce production of a specific antibody, IgT, in response to pathogen exposure on their gills. The researchers found that IgT coats the microbiota in the gills, helping control the community of friendly microbes.
Researchers at UEA have discovered a mechanism to target the defensive barrier of superbugs, bringing bacteria down without developing resistance. This breakthrough paves the way for a new generation of drugs that could revolutionize the treatment of antibiotic-resistant infections.
The study reveals novel adaptations and traits in infectious species of Leptospira that help illuminate its evolutionary history and provide new preventive and treatment approaches. It identifies key pathogen-specific features, including the CRISPR-Cas genetic machinery, which are unique to pathogenic Leptospira.
Researchers have provided a molecular blueprint of Globomycin, an antibacterial candidate with promise in stemming the post-antibiotic tide. The blueprint may aid the design of better globomycin analogues and explore thousands of new antibiotic solutions to common infections.
A critical discovery about how bacteria feed on an unusual sugar molecule found in leafy green vegetables could hold the key to explaining how 'good' bacteria protect our gut and promote health. Leafy greens are essential for feeding good gut bacteria, limiting the ability of bad bacteria to colonise the gut.
Researchers found that certain bacteria, including Francisella tularensis and Salmonella enterica, can spread rapidly throughout the body by interacting with immune cells called macrophages. This process, known as trogocytosis, allows bacteria to evade detection and survive inside infected cells.
Researchers found that urban homes have more human bacteria, such as Streptococcaceae and Lactobacillaceae, while rural homes have higher proportions of environmental bacteria like soil species. This shift could contribute to immune disorders like asthma and obesity in the industrialized world.
The INNUENDO project aims to integrate whole genome sequencing into routine surveillance and outbreak investigations, addressing the need for accessible IT frameworks and expertise. The cross-sectorial framework will standardize process, simplify data analysis, and enhance public health microbiology capabilities.
Researchers identify RimK as a crucial regulator of bacterial movement, which is essential for initiating infections. Disabling this protein significantly reduces the ability of bacteria to infect plants and humans, offering a new target for anti-infective drugs.
Researchers at Princeton University discovered the mode of action of antibiotic tropodithietic acid (TDA), revealing its ability to kill cancer cells. TDA's unique mechanism involves disrupting cell membrane function, rendering it a potential anticancer agent.
Researchers have discovered a natural clay deposit that exhibits strong antibacterial activity against the ESKAPE group of bacterial pathogens, including MRSA and other antibiotic-resistant strains. The clay, named Kisameet clay, has been used for centuries by indigenous communities to treat various ailments.
Researchers found that antiperspirant and deodorant significantly influence the type and quantity of bacteria on human skin. The study revealed a drastic shift in microbial ecosystems when participants used these products.
Research provides new insights into Group A Streptococcus by demonstrating its toxin, Streptolysin S, targets a specific protein on red blood cells, leading to hemolysis. Chemical inhibition of this protein reduces the toxin's activity and alters the pathology of GAS in skin infections.
Researchers found that ancient medicinal clay exhibits potent antibacterial activity against ESKAPE strains of bacteria, including Enterococcus faecium and Staphylococcus aureus. The rare mineral clay may provide a new treatment option for serious infections caused by these resistant pathogens.
A recent study published in Journal of Molecular Medicine found that e-cigarette vapor boosts bacterial virulence and inflammation, suppressing the human immune system. The research also revealed that exposure to e-cigarette vapor increases the risk of bacterial infections and suppresses lung function.
The BARDOT technology uses optical scattering techniques to create a unique 'fingerprint' pattern for each pathogen, eliminating the need for reagents. This innovation has shown great promise in identifying dangerous pathogens such as Listeria, Staphylococcus, Salmonella, Vibrio, and E. coli.
Researchers found that the bacterium Yersinia pestis persisted in Europe, causing repeated devastating waves of plague epidemics. The discovery sheds light on the evolutionary history of the pathogen and its potential role in modern-day antibiotic resistance.
A team of biologists at UC San Diego has developed a new method to determine if bacteria are susceptible to antibiotics within a few hours. The approach allows doctors to rapidly identify the appropriate treatment for patients with life-threatening bacterial infections, potentially slowing the emergence of drug resistance.
A new machine-learning technique, denoising autoencoder, uncovers previously unknown gene-expression patterns in P. aeruginosa, a notorious pathogen resistant to standard antibiotic therapies. The system identified characteristic patterns in response to antibiotics and low oxygen conditions.
Researchers at Washington University in St. Louis have identified a virulence factor secreted by the bacterium Acinetobacter baumannii, which is resistant to traditional antibiotics. The discovery could lead to the development of new antivirulence antibiotics that can suppress pathogen growth without eliminating susceptible bacteria.
The grant will explore various dosing regimens of daptomycin, a lipopeptide antibiotic, to treat vancomycin-resistant Enterococcus faecium (VREfm) bacteria. The research aims to prevent resistance development and improve treatment outcomes for patients with life-threatening infections.
A UBC study found that rats can absorb disease agents from their environment and spread them, posing a significant health threat to both poultry and humans. The researchers discovered avian pathogenic E. coli in the feces of farm rats, with over one quarter carrying multidrug-resistant strains.
Scientists uncover the structural and functional properties of the BabA protein, which adapts to different ABO blood group sugars in humans. The discovery provides perspectives on developing drugs that disrupt bacterial attachment and eradicating Helicobacter pylori infections.
A Georgia State University researcher is investigating how the adaptive immune system can control intestinal bacteria to prevent inflammation in the gut. The project aims to identify a way to activate the mucosal immune system to reduce levels of bacteria with high potential to promote inflammation.
Researchers found that bacterial growth and biofilm formation depend on fluid flow and space shape. Fluid flow can interfere with quorum sensing, affecting disease-causing bacteria behavior.
Researchers found that short-term exposure to different outside host resource types and concentrations affects Serratia marcescens' virulence in Galleria mellonella-moth. This suggests that even genetically similar bacteria can differ in their virulence depending on the source of nutrients.
Researchers found that if groups of targeted cells are large enough, the bacterial superweapon T6S can be thwarted. This allows protected interior cells to multiply quickly and replenish the group's numbers, making it impossible for the bacteria to take over. The study provides insight into how cells withstand powerful aggressors.
The NIH has awarded funding for 24 research projects developing non-traditional antibacterials, including therapeutic bacteria and phage therapy, to combat increasing antibiotic resistance. The grants aim to provide new treatment options for deadly infections.
Researchers at Arizona State University have identified the natural environment of formation for toxic clay antibacterial properties. The discovery reveals how chemically reduced iron tricks bacterial cells into opening their walls, followed by aluminum, which propels the cell wall open and poisons the cell.
The study of the Iceman's gut microbes reveals a surprising connection to Asian strains and modern European strains, suggesting that recent human migrations influenced European genetic makeup. The findings also indicate that the Iceman may have been ill before his murder, with high levels of virulence factors in his gut microbiome.
A harmless bacterium found in the nose can inhibit a major cause of pneumonia, meningitis, and other infections. The study provides evidence that Corynebacterium accolens releases antibacterial free fatty acids from human nostrils and skin surface triacylglycerols.
Scientists are exploring the potential of bacteriophages, which target specific bacteria, to prevent and treat intestinal illnesses like Salmonella, Campylobacter, and E. coli in children. The research aims to develop a new approach for treating food poisoning in developing countries.