Articles tagged with Bacterial Pathogens
A consortium has launched a programme to develop a TB vaccine, with the Max Planck Institute for Infection Biology developing a highly promising candidate. The vaccine aims to improve upon the existing BCG vaccine, which lacks effectiveness against pneumotuberculosis.
Researchers used gene chips to analyze the pattern of gene-expression changes for tuberculosis in a living host, discovering a specific set of genes activated after 21 days post-infection. This indicates that these genes help the pathogen survive within the host while avoiding detection by the immune system.
UCSD School of Medicine researchers have identified a mechanism leading to life-threatening infections, where PKR protein causes macrophages to die, allowing bacteria to spread. The discovery may help develop inhibitors for PKR, controlling nasty infections and reducing flu-related deaths.
The study reveals that people from different regions carry distinct strains of the tuberculosis bacteria, indicating sociological interactions play a key role in transmission. This finding has significant implications for vaccine development, potentially leading to region-specific vaccines.
Neutrophils can produce NETs, a net-like structure that binds, disarms, and kills bacteria. This novel defense mechanism was discovered by researchers at the Max Planck Institute for Infection Biology.
Researchers investigate how harmless bacteria trigger immune response, offering new insights into oral health and potential treatments for infections. Beta-defensins, natural antibiotics produced by the body, may hold key to preventing infection, according to expert Dr. Beverly Dale.
A Stanford study found that Listeria bacteria can survive for long periods outside of its hosts and thrive in the gall bladder, posing a risk of food poisoning. The research suggests that the organ's unique environment makes it an ideal place for the bacteria to grow, highlighting the need for improved hygiene practices.
A UCSD study found that inactivated probiotics can effectively alleviate colitis in mice, suggesting a new approach to IBD treatment. The study also identified the innate immune system as a key player in the beneficial effects of probiotics.
Researchers have developed a protective coating that prevents deadly post-operative infections from Pseudomonas aeruginosa, a virulent pathogen that kills 100% of untreated mice. The coating, which works by pleasing the bacteria and preventing them from invading the host's bloodstream, has shown promising results in animal studies.
Researchers at the University of Illinois have discovered a new enzyme that can create antibiotic compounds by nature's machinery. This breakthrough could lead to the development of new antibiotics and combat antimicrobial resistance.
E. coli bacteria undergo four distinct developmental stages during UTIs, including a quiescent state that may create reservoirs for recurrent infections. Researchers hope to use these stages as guides for new drug development.
Researchers discovered that the alternative outer surface protein OspC facilitates Borrelia burgdorferi's invasion of tick salivary glands. Inhibiting OspC with antibodies can prevent B. burgdorferi from invading and transmitting to new hosts, offering a potential approach to reducing Lyme disease incidence.
Researchers identified 31 novel polypeptide families that inhibit Staphylococcus aureus growth when expressed in bacteria. They used phage genomics to screen for small molecule inhibitors and found several compounds that inhibited bacterial growth and DNA synthesis.
The cold-chain hypothesis proposes that psychrotrophic bacteria in refrigerated foods contribute to Crohn's disease. These bacteria have been identified in disease lesions and may trigger excessive host responses.
Researchers found that a gene mutation led to a more deadly strain of tuberculosis, which spread rapidly in mice and caused increased bacterial load in organs. The mutated bacteria were able to evade the host's immune system, leading to severe infection and death.
A new class of compounds called CBR703 series inhibit RNA polymerase, a key enzyme in gene expression, and hinder the ability of bacteria to perform crucial catalytic functions. The compounds render RNA polymerase useless by binding to a specific place on the enzyme.
Researchers at Rockefeller University have discovered a new pathway, LRG-47, that can disarm TB and prevent its replication in mice. Strengthening this defense could lead to new treatments for latent TB infections, which affect an estimated 10 to 15 million people in the US.
Cumbre Inc. and University of Wisconsin-Madison researchers have published data on a new class of bacterial RNA polymerase inhibitors with major breakthrough potential, offering a powerful tool to study gene expression mechanisms and developing new antibiotics against bacterial pathogens.
Cystic fibrosis patients with inhaled antibiotics show improved lung function and reduced bacterial growth. Effective antibiotic therapy is essential for managing CF lung disease.
Researchers will analyze the external environment of tularemia bacteria, develop a vaccine for ricin, and engineer antibodies against anthrax. They will also work on developing drugs to treat Lassa fever and understand how plague blocks the immune system.
Researchers at PhageTech identified phage-derived antimicrobial proteins that inhibit bacterial growth and kill bacteria in diverse ways. The company's technology platform has led to the discovery of novel bacterial targets essential to bacterial growth, which are being screened for small molecule compounds as potential new antibiotics.
Researchers at University of Wisconsin-Madison uncover a potent toxin reveals new antibiotic resistance mechanism, where bacteria deploy a protein to intercept and inactivate the toxin. This mechanism points to the fact that bacteria continue to find new routes to evade antibiotics, threatening the fight against deadly bacteria.
Researchers at Virginia Tech used an atomic force microscope to measure the sticking efficiency of live Enterococcus faecalis bacteria. They found that the bacteria were surprisingly robust and could withstand various conditions, which can help design more effective filters for water treatment.
A genetically engineered strain of lactobacillus could significantly inhibit HIV infection in humans, offering a safe and long-lasting way to protect women. The research uses naturally colonizing bacteria to block and inactivate viruses before they reach host cells.
Researchers identified 80 genes in the blood-brain barrier activated by Group B Streptococcus, a leading cause of bacterial meningitis. These genes triggered an immune response by mobilizing neutrophils to combat infection.
Researchers at the NIH/NIAID have discovered that streptococcal infections trigger altered gene expression in neutrophil white blood cells, exposing potential targets for new treatments. The findings provide insight into how these common bacteria evade immune defenses.
The sequenced genome of Pseudomonas syringae provides a blueprint for understanding its virulence and pathogenesis, shedding light on the complex mechanisms behind bacterial disease
The sequencing of Pseudomonas syringae genome will help scientists understand how bacteria adapt to host organisms, enabling the development of new therapies. The genome also reveals commonalities between plant and animal pathogens.
The US Army has awarded a $1 million grant to Virginia Tech researcher Thomas J. Inzana to develop a vaccine and diagnostic test for tularemia, also known as 'rabbit fever'. The goal is to create an effective vaccine that can stimulate the production of proteins that stimulate T-cells of the cellular immune system.
Researchers at Scripps Research Institute identify a single protein called Trif that associates with different receptors to detect pathogens, triggering immune reactions. The protein could be a potential target for intervening in diseases like sepsis.
A joint U.S.-Georgian team aims to develop a novel treatment against bacterial pathogens causing salmonella infection. The grant supports phage therapy research to prevent massive outbreaks and address growing antibiotic resistance.
NYU researchers identify a gene, luxS, necessary for robust growth of the bacterium in test tubes. This discovery opens up new avenues for developing antagonists or inhibitors to control anthrax, a highly lethal bacterial infection.
Researchers have discovered an organelle in a prokaryotic bacterium that is identical to the acidocalcisome found in eukaryotes. The finding suggests a targeted approach to killing disease-causing organisms and challenges the origin of eukaryotic organelles.
A comprehensive study reveals that factors such as adhesion, invasion, and translocation determine the degree of illness from Listeria monocytogenes. Understanding these mechanisms could lead to the development of vaccines to prevent food poisoning.
Bacteriophage, or phage, previously thought not to be infectious to humans, may be a new target for fighting certain bacteria that produce toxins. Scientists found that phage can transfer toxins and genes between bacteria, transforming harmless microbes into virulent bugs.
Researchers solved the atomic structure of pilin proteins in Pseudomonas aeruginosa and Vibrio cholerae, essential for bacterial movement and infection. This knowledge provides crucial insights for developing novel antibiotics and vaccines against these deadly diseases.
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 laboratory study found that tea polyphenols inhibited the growth of oral bacteria, reducing volatile sulfur compounds. The study also showed that low concentrations of polyphenols hindered the enzyme catalyzing hydrogen sulfide formation, cutting its production by 30%.
Researchers have discovered a new bacteriophage, CEV1, that can efficiently infect and kill E. coli O157:H7 in livestock gut systems. This natural approach could lead to an effective management strategy to eradicate the pathogen from livestock.
Researchers from The Institute of Genomic Research sequenced B. anthracis genome to improve vaccine design and drug development. Despite similarities with closely related bacteria, the study found unique genes giving B. anthracis its ability to thrive on protein-rich matter.
Researchers have deciphered the genome of Bacillus anthracis, a deadly soil bacterium that has been weaponized as a biowarfare agent. The analysis reveals that the bacterium's virulence is linked to specific genes and plasmids that enable it to thrive in environments rich in protein.
Researchers have discovered a complex system of communication in bacteria, known as quorum sensing, which allows them to sense the size of their colony and produce toxins. This system has significant potential for rapid pathogen sensing and novel antibiotic strategies.
A new study by The Institute for Genomic Research found close similarity among the DNA sequences of Chlamydiae pathogens, including C. trachomatis, C. pneumoniae, and C. muridarum, which cause human diseases such as blindness and pneumonia. Nearly 800 genes discovered in C. caviae were also found in these other bacteria.
Scientists identified a genetic key to TB bacteria survival in lung cells, revealing that SecA2 protein is crucial for virulence and secreting antioxidant molecules. This finding may aid treatment development and has implications for other disease-causing bacteria.
The study found that nearly a third of the E. faecalis genome consists of mobile or 'foreign' DNA, which plays a crucial role in helping the bacterium develop drug resistance. The analysis identified two sites in the genome related to vancomycin resistance, including a novel transposon carrying vanB resistance genes.
Researchers are uncovering key genes and their interactions in diseases such as Down's Syndrome, autism, and tuberculosis. The goal is to identify markers for disorders like autism that could be detected by blood tests, and develop new treatments like drugs targeting gene adaptation mechanisms.
Experts are exploring ways to validate and interpret genetic information from microbes in court cases. The lack of established standards poses a challenge, but advancements in molecular technology have made it possible to analyze DNA and RNA levels with new insights.
Researchers identified a complete iron-acquisition pathway in Staph. aureus, which also applies to Anthrax and Listeria. This discovery could lead to the development of new drugs to disrupt the pathway and prevent infection.
Scientists have discovered how the strep bacterium evades destruction by the human immune system, leading to new research on vaccine candidates and therapy interventions. The study found that GAS becomes more resilient to ingestion and killing by PMNs over time or produces factors that alter normal PMN function.
Researchers from UCSB and OSU have identified SAR 11 bacterioplankton, comprising up to 50% of the surface microbial community, using fluorescence in situ hybridization. This discovery opens up new avenues for understanding the role of microbes in natural systems and their impact on the ocean's ecosystem.
The research found that Helicobacter pylori can use hydrogen as an energy source, increasing its colonization in mice. The study showed that mice stomachs contained sufficient hydrogen to support the growth of H. pylori.
A new UGA study reveals that Helicobacter pylori and other human pathogens use molecular hydrogen as an energy source, leading to increased stomach colonization ability. The discovery has profound implications for the treatment of diseases such as gastric cancer and bacterial diarrhea illnesses.
Researchers identified key genes and metabolic pathways to differentiate the bacterium from related species, shedding light on its unique biology and slow growth rate.
Scientists at The Scripps Research Institute report that antibodies can kill bacteria through the production of hydrogen peroxide, which also leads to the formation of ozone. This discovery opens up possibilities for new antibody-mediated therapies for conditions ranging from bacterial and viral infections to cancer.
Researchers have developed a sepsis vaccine that provides outstanding protection by reducing inflammatory chemicals by nearly 95%. The vaccine targets endotoxins, which trigger the immune system's response to infection.
Researchers found that HIV-specific killer T cells in asymptomatic individuals can recognize and kill both laboratory strain and autologous virus-infected target cells. However, these cells in symptomatic patients with AIDS are no longer effective against their own mutated virus.
A new study reveals dispersin, a protein on the surface of E. coli bacteria, helps promote its ability to survive and spread in the gut. Dispersin is now being explored as a potential vaccine candidate due to its strong immune response-provoking properties.
Conducted studies show a strong majority of consumers favor irradiated ground beef, with surveys indicating 70-80% support the process when informed. Irradiation eliminates 99.9% of pathogens without changing taste or nutritional value.
Researchers at Purdue University have found that chlorine dioxide gas is highly effective in killing bacteria on food surfaces, particularly Listeria monocytogenes. The study showed significant reductions in bacterial populations on apple skin, stem cavity, and calyx using the gas.
UCSD researchers describe how Bacillus anthracis' lethal toxin disables macrophage signaling, allowing bacteria to spread unchecked. The study's findings open the door for developing an antidote to block the toxin's action.