Articles tagged with Bacterial Populations
Researchers at San Diego State University have discovered a beneficial bacterium that produces nanoscale syringe-like structures called the Death Star, which can deliver proteins to target cells and tissues in humans. This discovery could lead to novel therapeutics and vaccines for diseases such as cancer.
A recent study has characterized the diverse array of bacterial species residing in human guts, revealing 157 different types of organisms. The research, led by Hiroki Morizono, aims to improve public health by establishing a baseline for healthy gut microbiomes and exploring health implications for patients.
Researchers developed a simple measurement of gene flow to define microbe populations, separating co-existing microbes in genetically and ecologically distinct groups. This approach identifies parts of the genome that show different adaptations, enabling pinpointing of populations associated with health conditions like Crohn's disease.
Researchers found that people on the Paleo diet had twice the amount of a key blood biomarker linked closely to heart disease. The study suggests that the diet's exclusion of whole grains may be to blame for elevated TMAO levels, which are associated with an increased risk of heart disease.
Researchers found that probiotic bacteria Pseudomonas fluorescens reduces the impact of white-nose syndrome in bat populations about five-fold. The treatment lengthened the amount of time bats stayed in the mine, allowing them to recover from the disease and emerge during spring-time when insects are available.
Critically ill children with reduced numbers of 'good' bacteria and decreased levels of beneficial chemicals have a higher risk of organ failure. Chemical analysis revealed dramatic depletion of certain bacterial compounds, including hippurate, formate, and 4-cresol sulphate.
Researchers have discovered a clear connection between gum disease and Alzheimer's disease, finding that the bacteria causing gingivitis can move from the mouth to the brain. Brushing teeth and using floss may help slow down Alzheimer's progression, according to the study.
A recent study by WVU biostatistician Snehalata Huzurbazar found a correlation between the vaginal microbiome and preterm birth rates, particularly in African American women. The researchers identified specific bacteria species that proliferated in women who gave birth prematurely, which may help predict and prevent preterm births.
Researchers characterized Helicobacter pylori's genetic diversity in individual patients, showing adaptations to specific stomach regions and the impact of antibiotics on its population structure and resistance. The study suggests that antibiotics can select for resistant variants and shape the species' evolutionary dynamics.
Researchers discovered that H. pylori exploit a specialized niche within gastric glands to maintain stable bacterial reservoirs. This allows the bacteria to serve as stable populations and prevents incoming bacteria from establishing themselves.
Researchers at ETH Zurich discovered that bacteria in a microfluidic T-maze exhibit diverse chemotactic sensitivity due to genetic variations, allowing some individuals to outperform others. This phenotypic heterogeneity may provide an evolutionary advantage for the bacteria, enabling them to adapt to changing environments.
A study found that a newborn's first stool microbiome is linked to their risk of becoming overweight at age 3. Infants exposed to antibiotics during infancy had altered gut bacteria populations, which may contribute to long-term weight gain.
Scientists from the University of East Anglia have discovered a unique group of oil-eating bacteria in the Mariana Trench, which is located approximately 11,000 meters below sea level. The bacteria are capable of consuming hydrocarbons similar to those found in crude oil and natural gas.
Researchers found that intestinal worms prevented weight gain on high-fat diets by boosting specific bacteria producing norepinephrine, leading to increased energy consumption and fat burning. This mechanism may lead to the development of new methods for weight loss.
Researchers discover how bacteria evolve mutations that confer antibiotic resistance and find a way to inhibit this process with FDA-approved drug edaravone. The study reveals that low doses of ciprofloxacin induce DNA breaks, leading to mutations in bacterial populations.
A University of Pennsylvania post-doc's new theory describes how factors regulating individual cell size influence the growth rate of entire bacterial populations. The model predicts oscillations in growth rates, providing a new mathematical framework for studying population dynamics.
Research found that natural selection favors cheating rhizobia that provide fewer benefits to their host plants, destabilizing mutualisms. The study suggests that beneficial bacteria services vary in natural systems and can be exploited by cheater strains.
A new study reveals that Blastocystis subtype 7 selectively kills beneficial Bifidobacterium and Lactobacillus in the gut, leading to oxidative stress and lesions. This pathogenic microbe can contribute to inflammatory bowel disease, irritable bowel syndrome, and gastrointestinal cancers.
A team of researchers discovered and characterized over 5,000 microbial species in the human microbiome, with 77% being newly identified. The study highlights the personalized nature of the microbiome and its relevance to global health, particularly in non-Westernized populations.
A population-level study identified specific gut bacteria linked to depression and found that a wide range of gut bacteria can produce neuroactive compounds. The study used faecal microbiome data from 1,054 individuals and validated its results in independent cohorts.
A recent study published in Immunity reveals that Lactobacillus bacteria interact with immune system cells to regulate the intestinal barrier function. The interaction, mediated by the Mincle receptor, promotes a beneficial response and helps prevent diseases such as ulcerative colitis and Crohn's disease.
Cyanobacteria assemble intricate carboxysomes to concentrate carbon dioxide, improving RubisCO efficiency. Researchers discovered that CcmM binds to RubisCO enzymes in a non-traditional manner.
A new technique examines environmental factors controlling disease transmission to a single aerosol particle and bacterium. The study finds that environmental factors, such as humidity and light, can significantly impact bacterial viability.
A recent study analyzed the gut microbiomes of ethnically diverse Africans from seven populations, revealing wide ranges of microbiome profiles. The researchers found that while there were differences between industrialized and non-industrialized populations, there were also unexpected similarities between groups.
A microbial metabolite from pomegranates, Urolithin A, has been shown to reduce inflammatory bowel disease by increasing proteins that tighten epithelial cell junctions in the gut. The researchers also found that a synthetic version of UroA, UAS03, shows therapeutic and protective effects against colitis.
A team of researchers analyzed the immune system of P. aeruginosa in cystic fibrosis patients, finding diverse bacterial populations with varying responses to viruses. The study's findings have implications for phage therapy and understanding infectious disease.
Researchers developed an AI model to predict the risk of developing a serious infection from Staphylococcus epidermidis genomic features. The model uses large-scale population genomics and machine learning to identify high-risk genotypes, which could lead to proactive identification of individuals at risk before surgical procedures.
Researchers have discovered that immune cells sacrifice themselves to release proteins that fight invasive bacteria and damage. This process, called pyroptosis, is an explosive form of cell death that warns other immune cells about the threat.
Researchers analyzed the interactions between five core species of bacteria found in the fly gut, revealing a nuanced tradeoff between lifespan and fecundity. The study suggests that the presence or absence of individual species influences the host's fitness, and that the microbiome's influence cannot be solely attributed to its parts.
A study by Duke University researchers shows that pathogen responses to first-line antibiotics can be distinguished, allowing for more effective treatment strategies. The researchers developed a method to quantify resistance and resilience, enabling clinicians to prescribe targeted dosing regimens.
A study by Stanford University researchers found that four Himalayan populations with different dietary histories have distinct gut microbiome compositions. The findings suggest that changes in human lifestyle can occur within a lifetime and may be driven by dietary factors.
Researchers studied bacterial ecological systems using experiments and computer models to investigate population dynamics, identifying key role of stochastic effects in early colony patterning. They also found that interactions between neighboring bacteria can amplify local variation, influencing competition outcomes.
A new study reveals that the unique compositions of bacteria in mice' guts are inherited from parents and remain stable over generations. The dominant mode of transmission is vertical inheritance, but some bacterial pathogens can be transmitted horizontally, possibly due to increased oxygen tolerance.
Researchers at the University of Virginia have developed a new approach to understand the interactions between trillions of microbes in the human body. By combining computer simulations and laboratory experiments, they were able to shed light on how microorganisms influence human health and disease.
New research from North Carolina State University and the University of Copenhagen finds that most bacterioplankton are B1 auxotrophs, meaning they have to glean the vitamin or pieces of it from their environment. The study also reveals fluctuations in genes responsible for making and/or using environmental B1 and precursors over time.
A new study reveals that low-calorie sweeteners can change the types of bacteria found in the gut, leading to impaired regulation of glucose levels. The research found a significant reduction in beneficial bacterial species and an increase in opportunistic gut bacteria.
Researchers discovered that a small portion of pathogenic bacteria can go dormant, avoiding antibiotic effects. This 'hibernation' mechanism allows them to survive and resume regular functions when safe. Understanding this process is crucial for developing new antibiotics targeting the dormant state.
A recent study used an artificial intestine to investigate how changes in diet affect the microbiome. The research found that a switch from a western diet to one composed exclusively of dietary fats led to increased populations of fatty-acid metabolizing bacteria and decreased production of short chain fatty acids, which are compounds ...
A mathematical model developed by international researchers predicts that temperature-dependent phages can affect the spread of melioidosis in Southeast Asia. The study reveals opportunities for disease control, including rescheduling work on rice fields and using protective gear during high-risk periods.
Researchers developed a mathematical model to predict the spread of melioidosis in Southeast Asia, highlighting the impact of bacteriophages on bacterial populations. The study found that phage-free bacteria numbers are highest during cooler periods, and using fertilizers can kill off phages, posing a risk of more frequent infections.
Researchers use automated systems to collect around-the-clock data on bacterial populations, finding that more frequent feast cycles lead to faster recovery from famine states. The team uncovers the mechanism behind this phenomenon, attributing it to dispersal of cells during feast conditions.
A new diagnostic tool has been developed to identify the species of mosquitoes that carry diseases such as Zika virus and dengue. The tool uses a smartphone camera and detects the presence of biopesticide Wolbachia, which helps curb disease transmission. With high accuracy of over 97%, this innovative technology represents a significan...
A study of stunted children found decompensation of the gastrointestinal tract and increased abundance of oropharyngeal taxa in their gut microbiomes. This suggests a key role for oral cavity bacteria in childhood growth stunting.
Researchers used Pseudomonas aeruginosa and its mutants to study cheating behavior in bacteria, revealing that manipulating social interactions can prevent population collapse. The team created a mathematical model to predict how to change stable interactions among cheaters and cooperators.
Cesarean-born babies may be at risk for health problems due to differences in their microbiome. A new review suggests that routine antibiotic administration during C-section deliveries is a major underlying problem, rather than a lack of exposure to vaginal microbes.
Researchers at Stanford University School of Medicine have shown that manipulating a mouse's diet can favor the engraftment of specific bacterial strains. By adding a carbohydrate-rich compound, they were able to control how much a bacterium grows in the intestine and even introduce new strains into the gut microbiome.
Orman aims to identify and explore mechanisms that lead to dormant cell formation to discover new therapeutic strategies against persister cells. Using E. coli as a model organism, he will perform high-throughput screening to find candidate genes regulating cell dormancy.
Bacterial diversity may have a much longer lifespan than previously thought, according to University of Montana researchers. They found that some specialized cells called heterocysts can produce different kinds of bacteria, which has been preserved for tens of millions of years.
The Diplachne genus, consisting of two species, exhibits remarkable features such as high salt tolerance and the presence of nitrogen-fixing bacteria. This discovery has significant implications for the reclamation of salinized agricultural soils.
A new study published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that women with PCOS have less diverse gut bacteria, which may influence the development of the condition and its impact on quality of life. Elevated testosterone levels in women with PCOS were linked to these changes.
A team of scientists discovered that beneficial viruses can integrate into bacteria carrying restriction-modification systems, which protect them from lethal infections. The study showed that these systems offer a temporary respite, allowing bacterial populations to grow and increasing the chances of acquiring beneficial viruses.
The study reveals that archaea use the same mechanism to regulate cell size as bacteria and budding yeast, with some variability in precision. The researchers found that Halobacterium salinarum controls its size by adding a constant volume between two events in the cell cycle.
Researchers have shed new light on the diversity paradox by developing a stochastic model of bacteria-virus interactions. Their findings suggest that the coevolutionary arms race between bacteria and viruses leads to diverse populations and boom-bust cycles, preventing any single species from dominating the ecosystem.
A single grain of sand harbors up to 100,000 microorganisms from thousands of species, showcasing the impressive diversity of bacterial life. This discovery highlights the crucial role sand-dwelling bacteria play in processing carbon and nitrogen compounds and purifying the marine ecosystem.
Researchers at Harvard's Wyss Institute have developed two new types of kill switches for engineered microbes, ensuring biocontainment and stable autonomous control. The Essentializer and Cryodeath systems use toxin/anti-toxin combinations to regulate bacterial growth and confine them to specific environments.
A study found that a high-salt diet shrinks beneficial gut bacteria, leading to pro-inflammatory immune cells and high blood pressure. Probiotics can reverse these effects in mice and humans, suggesting potential therapeutic target for treating high blood pressure.
Researchers studied microbial communities in permafrost sedimentary rocks under low temperature and pressure conditions similar to those on Mars. They found that these communities showed high resistance to simulated Martian environment, with some bacteria surviving even after doses of ionizing radiation exceeding 80 kGy.
Researchers at Johns Hopkins Bloomberg School of Public Health discover two new strategies to combat malaria: genetically modified bacteria that spread rapidly in mosquito populations and boost the immune system of malaria-carrying mosquitoes. These innovative approaches aim to reduce the need for continuous malaria control measures, p...
A study of 188 Hadza hunter-gatherers reveals that their diet affects the composition of their gut microbiome. The researchers found that traditional diets rich in plants and hunting were associated with higher levels of beneficial bacteria, while Western diets were linked to reduced diversity.
Researchers found that microbes living at low population densities are more likely to mutate and develop antibiotic resistance. This discovery could lead to better understanding of antibiotic resistance and its prevention.