The RetS gene product in P. aeruginosa activates virulence factors for acute infection while repressing those required for long-term, chronic infection. This system may orchestrate the transition from acute colonization to chronic infection in this human pathogen.
Cryptosporidium hominis is a highly contagious parasite that causes watery diarrhea and can lead to dehydration, weight loss, and stomach cramps. The decoded genome sequence holds promise for developing preventive vaccines and pharmaceutical treatments.
The NIH has funded two new bioinformatics resources at UT Southwestern to improve drug discovery and vaccine development. The BioHealthBase will focus on understanding how microbes establish infections, while the ImmPort system will integrate data from different biomedical research areas to identify disease-causing genes and proteins.
PathPort is a life sciences interoperability framework providing access to biological characterizations of known pathogens and their near relatives. The project aims to aid in detection, identification, and analysis of high-priority pathogens using its analytical tools and data models.
Scientists have found a new form of long-term memory T cell that can combat leishmaniasis even without the parasite's presence. This discovery may lead to an effective vaccine against this disease and others mediated by immune cells.
Purdue researchers develop a new optical biosensor that can detect minute quantities of Listeria monocytogenes in less than 24 hours. The sensor is selective enough to recognize only the species monocytogenes and has improved detection capabilities compared to existing commercial test kits.
Researchers found evidence of chytrid fungus persistence in surviving populations of Taudactylus eungellensis, a species that had suffered a massive decline. The study suggests that frog populations can persist with an endemic infection of the fungus, challenging the assumption that infected populations are wiped out.
Researchers have cracked the genetic code of B. mallei, a highly evolved pathogen that causes glanders, an infectious equine disease. The study reveals a tightly regulated set of virulence genes and genomic instability, which may explain why B. mallei can evade host immune responses.
The study reveals that Strep bacteria employ a dual strategy to outsmart the immune system: producing a toxic 'sword' called hemolysin to kill immune cells, and an antioxidant 'shield' made of carotenoids to protect itself from oxidative damage. This unique approach makes GBS a more lethal pathogen.
The study uses nearly 1000 SNPs to define the genetic and evolutionary types of several anthrax isolates, providing a critical step toward future detection of this potential public threat. The results also establish a model for other biothreat pathogens and common public health-related diseases.
Researchers discovered that streptokinase, an enzyme produced by Streptococcus, enables its infection in humans while showing minimal activity against other mammals. The study creates a transgenic mouse model for studying human-specific microbes.
Climate models project a significant impact on Alaska's tundra ecosystem, with up to 90% loss of tundra area by 2100. Increased precipitation and temperature changes will lead to shifts in vegetation, insect and pathogen attacks, and potential forest fires.
The project aims to advance scientific research against bioterrorism agents and emerging infectious diseases through a unified proteomics data management system. The system will store proteomics information from six Proteomics Research Centers, providing free public access and enabling direct queries.
Researchers developed a mathematical model that accurately reproduces gypsy moth population outbreaks, combining host-pathogen and predator dynamics. The model resolves the irregular timing of outbreaks and accounts for spatial synchrony, paving the way for applications to other forest insects and small mammals.
A study by St. Jude Children's Research Hospital found that Asian bird flu viruses, such as H5N1, became highly pathogenic through continued circulation and gene swapping in domestic ducks in southern China. The researchers warn that control of poultry outbreaks is crucial to prevent the virus from evolving into a human pandemic.
Researchers discover a new strategy to combat type 1 diabetes by blocking the interaction of RAE-1 with its immune receptor, NKG2D. The treatment has shown complete effectiveness in preventing diabetes development in mice and promises potential as an effective human treatment.
Researchers have successfully mapped the genomes of two devastating fungal pathogens, Phytophtora sojae and Phytophtora ramorum, which causes sudden oak death disease. The genome sequences will aid in developing better detection methods and tracking the spread of the disease.
Researchers created a virtual model of the human immune system to study M. tuberculosis, a bacterium that causes TB. The computer model revealed key findings on granuloma formation and the immune response, shedding light on why some people fight off infection while others get sick.
A recent study has identified 14 resistant vegetable varieties that can help pumpkin growers wait out the deadly P. capsici pathogen. Rotating these crops may provide a temporary solution until the pathogen is safe to plant pumpkins again, which could mitigate yield losses of up to 100 percent.
A new protein, DEFB118, has been discovered in the male reproductive tract and has potent antibacterial activity. It may aid fertilization by protecting sperm from harmful organisms encountered in the female reproductive tract.
Diverse classes of antimicrobial peptides share a common structural signature, revealing fundamental interactions between host and pathogen. This discovery offers new insights into immune defense and drives technology to combat antibiotic-resistant infections.
Researchers found evidence of Heterobasidion annosum pathogen originating from eastern North America, likely hitching a ride in untreated lumber from infected trees. The pathogen has since established itself in the Presidential Estate of Castelporziano, killing large swaths of stone pine trees.
The completed genome sequence of Cryptosporidium parvum provides new insights into the parasite's genetic makeup and biochemical pathways. This information can be used to develop early diagnosis, prevention, and treatment strategies for humans and animals affected by the parasite.
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.
A new study by Ristaino and Kim May identifies the Ia strain of P. infestans, tracing its probable roots to the Andes Mountains in South America. The researchers analyzed 186 specimens from six regions worldwide, confirming 90% were infected with P. infestans.
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.
A study published in the Vadose Zone Journal examines how different soil types influence Cryptosporidium parvum's transport to groundwater. The research found that sandy soils allow rapid movement of pathogens, while structured soils with large macropores have limited breakthrough.
Chronic HIV infection causes non-specific premature maturation of T-cells, resulting in replicative senescence and exhaustion of the immune system. This leads to an increased likelihood of opportunistic infections, making HIV so deadly.
A 1998 Finnish outbreak was traced to contaminated iceberg lettuce grown on open fields with roe deer, which carry the Y. pseudotuberculosis pathogen. Researchers investigated and proposed prevention methods, including fenced fields and disinfection strategies.
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 Purdue University identified a protein on intestinal cells that allows Listeria monocytogenes to attach and cause infection. Understanding this mechanism could help develop a vaccine strategy to prevent the deadly disease, which has a 20% fatality rate.
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.
Researchers developed a framework to account for mutations in models assessing emerging infectious disease emergence, highlighting the potential for long transmission chains and disease adaptation. The model suggests that even low reproductive numbers can lead to dramatic outbreaks as new strains evolve.
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 study reveals that marine epidemics spread approximately 100 times faster than comparable terrestrial epidemics. This faster rate of spread is attributed to the lack of barriers to pathogen dispersal in marine environments and better long-term survival of mobile infectious stages.
Researchers at Duke University discovered that mast cells trigger both the innate and adaptive immune responses by releasing TNF, which recruits infection-fighting T-cells and induces antibody production. This finding redefines how the immune system functions and may lead to new therapeutics for disease protection.
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.
The completed genomic sequence of Fusarium graminearum, a fungus causing widespread damage to wheat and barley crops, offers a roadmap for developing new control methods. Researchers will focus on understanding gene function to unravel mechanisms to combat this devastating pathogen.
Researchers at the University of Wisconsin-Madison have identified a gene that protects potatoes from late blight, a fungal pathogen responsible for the Irish potato famine. The discovery holds significant potential to save farmers hundreds of millions of dollars and benefit the environment by reducing toxic chemical applications.
The NIAID is distributing the GeneChip SARS Array at no cost to qualified researchers worldwide, providing a powerful tool to better understand the SARS coronavirus and its spread. The array will help scientists achieve objectives such as constructing a family tree of SARS coronaviruses and tracing the virus's evolution.
Researchers are developing faster methods to detect pathogens in the environment, such as DNA-based field assays and real-time PCR systems. However, challenges persist, including identifying the viability of pathogens and distinguishing between natural and genetically modified organisms.
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 at Cornell University have discovered a gene that codes for an enzyme producing nitric oxide, a hormone triggering plant's defense against pathogens. The discovery provides new insights into the biochemical and genetic pathways enabling plants to protect themselves from disease.
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 create a hybrid compound combining an antibody with a traditional anticancer drug, effectively steering the hybrid towards cancer cells. The approach shows promise in preclinical studies and could be used to design hybrids against multiple cancers.
The complete DNA sequence of Coxiella burnetii, the Q Fever microbe, has been deciphered, revealing information on its biology and ability to cause disease. Researchers found that the genome appears to be in the early stages of reduction, with numerous genes involved in virulence and interactions with its host.
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.
The symposium explored microbial forensics, a discipline combining public health epidemiology and law enforcement to investigate biocrimes. Key findings include recommendations for future action to address biocrimes posing threats to public health and stability.
Researchers create a new, cost-effective way to produce human therapeutic proteins using algae. They can now make large quantities of antibodies and other proteins much cheaper than traditional methods.
Otter populations are declining due to parasite infections, with 60% of dead otters infected. The parasite is spread through storm drains and creeks, affecting water quality. Invasive fish like ruffe and gobies also pressure yellow perch in Lake Michigan, depleting resources for sport fishing.
OHSU researchers identified a critical role of major histocompatibility complex (MHC) molecules in training T-cells to combat infections. The discovery may lead to the development of more effective vaccines and immune system boosting strategies for susceptible populations, such as the elderly.
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.
Potato late blight, a mutated funguslike pathogen, is affecting global potato production, causing brownish lesions that turn healthy plants into mush. The disease has spread globally, with Russia experiencing devastating yields, and experts warn of dire consequences for food security.
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.
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.
Scientists are sequencing the genomes of two deadly Phytophthora microbe species to understand their genetic secrets. The goal is to develop effective treatments and diagnostic tools for sudden oak death syndrome and soybean root rot, causing billions of dollars in damage annually.
Researchers at TSRI identified over 2,400 proteins in Plasmodium falciparum, the most deadly malaria parasite, which may lead to new vaccine targets. The study sheds light on how the pathogen causes malaria and could help scientists understand its lifecycle.
UC researchers have confirmed that coast redwood and Douglas fir are susceptible to Phytophthora ramorum, the pathogen causing Sudden Oak Death. The disease has already killed tens of thousands of oaks and tanoaks along California's northern coast.
The study found numerous differences among isolates of S. agalactiae, suggesting the pathogen's ability to adapt and emerge as a major human pathogen. The researchers identified genes unique to S. agalactiae that likely play a role in colonization or disease.
Vitex's INACTINE technology demonstrated complete parasite eradication of Trypanasoma cruzi, Plasmodium falciparum, and Babesia microti parasites. The company's pathogen reduction system meets critical requirements for commercial success, with potential to improve safety of red blood cell transfusions.