Articles tagged with Bacterial Populations
A new study examines mathematical models designed to draw inferences about how evolution operates at the level of populations of organisms. The researchers conclude that such models must be constructed with care, avoiding unwarranted initial assumptions and weighing existing knowledge.
A novel computational method estimates the level of connectivity in bacterial communities, revealing that species diversity is limited by interaction strength. Understanding these stability principles is essential for developing medical treatments and preserving the environment.
A new study by the University of Exeter found that antibiotic-resistant plasmid molecules can spread quickly through bacterial communities, making them more resistant to antibiotics. This raises concerns about the potential for antimicrobial resistance to spread in environmental settings and impact human health.
Research finds that intestinal inflammation liberates chemicals that nourish E. coli's growth and promote inflammation, highlighting new treatment targets for Crohn's disease. The study identifies key compounds that feed E. coli, such as phospholipids and amino acids, and shows that these compounds can enhance the bacteria's virulence.
Researchers found that a certain gut bacterium can break down quinapril, an ACE inhibitor used to treat high blood pressure, reducing its effectiveness. The study suggests that the same drug may not be suitable for everyone due to unique gut microbial compositions.
Researchers found that kitchen sponges provide an optimal environment for microbial diversity by mimicking the separation and communal spaces found in healthy soil. This complex structure supports both solitary and diverse bacterial communities, leading to higher biodiversity levels.
Scientists discovered that surviving bacteria share a common feature: they accumulate acid in their cells, shutting down protein synthesis. This leads to increased survival and can be exploited to develop new antimicrobial treatments.
A study by UConn Health and Washington University School of Medicine found that eating more meat correlates with worse MS symptoms, altered gut bacteria, and increased immune cells. The research identified key bacteria and metabolites associated with the disease, providing new insights into its causes.
Researchers developed a mathematical model that can predict resistance outcomes for various drug pairs. The model, called JDFE, characterizes mutations available to bacteria and allows for classification of drug pairs into those that facilitate or hinder multi-drug resistance.
Researchers found that half of Pseudomonas syringae strains benefited from the presence of aphids, but only the honeydew itself boosted bacterial populations. The study suggests using this phenomenon to develop alternative pest control methods.
Scientists created macroscopic living functional materials by adhering bacteria together, demonstrating improved mechanical properties and processability. The material can also self-heal within minutes and degrade organophosphate pesticides.
New research reveals that Prochlorococcus thrive in ocean waters where a shared predator with bacteria and phytoplankton coexists, not just warm temperatures. The study suggests this relationship is crucial for the microbe's survival and population distribution.
Scientists have measured the speed of Candidatus Liberibacter asiaticus, a bacterium causing citrus greening disease. The bacteria can colonize a tree in around 80-100 days, faster than symptoms appear, making it difficult to control.
Researchers from Rice University and the University of Wyoming discovered self-organization into circular aggregates in Myxococcus xanthus, a model system for social cooperation. The circular behavior is linked to TraAB protein overexpression, which creates a sticky bond between cells, preventing reversals.
A study of Edo-era Japanese skeletons reveals a prevalence of periodontal disease similar to modern times, with distinct bacterial species. Researchers analyzed dental calculus from 12 human skeletons and compared their oral microbiomes to modern samples, shedding light on the evolution of the oral microbiome.
The HKU team discovers a vast prokaryotic viral diversity in activated sludge, influencing pollutant removal and environmental protection. Phages can curb undesired bacteria, improving wastewater treatment efficiency.
Researchers at UC Berkeley have developed a new CRISPR editing technology that enables simultaneous editing of genes in multiple cell types and species within a microbial community. This approach, called community editing, has the potential to track edited microbes and understand their functions within complex ecosystems.
Researchers from Trinity College Dublin investigate the epidemiology and population biology of Enteroccocus faecium, a high-priority pathogen. They found that Irish isolates have evolved independently and are diverse, with a unique genetic transposon element encoding vancomycin resistance.
Researchers have discovered a specific type of gut bacteria in bees that can improve memory, with bumblebees showing enhanced memory when fed this bacteria. The study suggests a causal link between the gut microbiome and cognitive abilities, opening up possibilities for similar effects in humans.
A study by Anglia Ruskin University has identified potentially dangerous Pseudomonas bacteria in 21% of wild bird faeces collected from locations near the River Cam. The bacteria, which can be passed on to humans through cross-contamination, were resistant to multiple antibiotics.
Researchers at Hebrew University of Jerusalem discover a 'disrupted' state in bacteria that resists current antibiotics, requiring new pharmacological agents to combat. The breakthrough model predicts bacterial population responses to treatments, offering avenues for better treatments against cancer cells.
Researchers at the University of Exeter develop a new method to mimic microenvironments in the human body, overcoming a major obstacle to using phage therapy. The study finds that phage can effectively kill bacteria in these environments without promoting genetic resistance.
Researchers found that nanosilver treatment can increase the risk of recurrent infections when used long-term due to pathogen adaptation. Long-term exposure allows bacteria like Pseudomonas aeruginosa to evolve and resume normal growth upon discontinuation of treatment.
A study led by Jay T. Lennon found that nearly all bacterial populations persisted for 1,000 days without external food, with some having lifespans exceeding 100,000 years. This suggests that microbes can survive long periods of energy limitation and evolve under such conditions.
A single butterfly species introduced to an island in the 1990s had a significant impact on several insect populations, leading to genetic decline and high extinction risk for some species. The parasitoid wasp's mobility and symbiotic bacterial relationships played key roles in shaping this outcome.
Researchers found that extreme caloric restriction diets alter the gut microbiome, leading to weight loss in participants. The study suggests that a decrease in gut bacteria and an increase in Clostridiodes difficile may be responsible for the observed weight loss effects.
A study on the gastric bacterium Helicobacter pylori reveals that humans persisted in Siberia during the last ice age and recolonized northern regions. The findings also suggest a single migration of ancient Eurasians into the Americas via the Bering land bridge approximately 12,000 years ago.
Researchers used Helicobacter pylori DNA sequences to reconstruct ancient human migration from Siberia to the Americas. The study found a single migration event approximately 12,000 years ago, with some populations traveling to Siberia and then to the Americas.
Researchers investigated bacterial persistence in the human gut microbiome, identifying three dispersal strategies and finding that most strains are highly persistent. The study's results will inform targeted probiotic and treatment approaches to maintain a healthy gut microbiome.
Researchers analyzed magnetic fossil particles to decode environmental changes during the ancient warming event. The study found that oxygen levels declined rapidly in the New Jersey coast and fluctuated thereafter.
Researchers have shed light on early bacterial evolution by integrating vertical and horizontal gene transmission, revealing that a tree is still an apt representation of bacterial evolution. On average, genes travel vertically two-thirds of the time, suggesting a tree-like structure.
New research from the Cornell Lab of Ornithology analyzes the impact of a bird eye disease on house finch populations, revealing an escalating arms race between the birds' immune systems and bacterial strains. The study suggests that imperfect immunity is driving this battle, with bacteria evolving to overcome strengthened finch defenses.
A study published in International Journal of Environmental Research and Public Health found that exercise can alter the oral environment, favoring less harmful bacteria in people with NAFLD and gum disease. This shift may help reduce inflammation and improve overall health outcomes.
Research found that daily sugar-sweetened beverage consumption during adolescence impairs learning and memory tasks in adulthood. The bacteria Parabacteroides in the gut microbiome plays a key role in this process, even when not associated with sugar consumption.
Research on E. coli bacteria reveals that higher translation error rates lead to increased phenotypic variability at the single-cell level, affecting cell length and division time. However, population-level growth parameters show inconsistent correlations with mistranslation levels, highlighting the need for further investigation.
Bacterial mutants struggling to survive due to nutrient scarcity often form clusters to cooperate and share nutrients, rather than competing with wild-type bacteria. This cooperative behavior masks the true frequency of mutations, making it seem like a lower rate of mutant emergence is occurring.
A new study found that poor oral hygiene within 24-72 hours can lead to a steep decrease in good oral bacteria and an increase in bad bacteria associated with periodontitis. The researchers also discovered a sudden aging of the bacteria's microbiome, equivalent to about a year in less than a month.
A new model can predict the evolution of antibiotic resistance in bacteria by analyzing growth rates and resistance levels at different drug concentrations. This knowledge can help identify optimal treatment protocols, drug targets, and new antibiotic candidates to combat resistant bacteria that threaten global health.
A study found that toxins produced by bacteria can cause mutations in target cells, providing a competitive advantage and contributing to the evolution of bacterial populations. The toxins, which remove chemical groups from DNA, were found to be effective in causing mutations in certain bacterial species.
The researcher aims to identify common mechanisms among persister cells and their unique metabolic processes. The goal is to develop new strategies for understanding and combating bacterial persistence.
Researchers at the University of Exeter have identified a population of dormant Vibrio parahaemolyticus bacteria that are better equipped to revive when conditions improve. The study also discovered an enzyme involved in this process, which breaks down lactic acid into pyruvate, allowing the bacteria to survive for extended periods.
Researchers discovered that mosquitoes carrying Wolbachia bacteria are less susceptible to widely used pesticides. The study found that the bacterial species naturally infecting mosquitoes makes them resistant to three types of pesticide, potentially reducing their use and environmental impact.
Researchers found that flies in apple orchards can acquire fire blight bacteria from sugary droplets on diseased trees and transmit it to uninfected shoots. This discovery provides new insights into the disease cycle and highlights the importance of integrating historical literature into modern research.
Research reveals slow-moving bacteria can outcompete fast-moving counterparts due to efficient invasion strategies. The study uses genetics, experiments, and physics to understand the behavior of bacteria on an individual and collective level.
Researchers at University of Hawaii discovered that bacteria can direct squid hosts to change gene-expression programs for a more inviting home. A specific bacterial sRNA influences the squid's immune reaction, allowing the bacteria to persistently colonize and deliver beneficial effects.
Biomedical engineers at Duke University have developed a new model that predicts the persistence of genetic packages in bacterial populations. The model, dubbed 'persistence potential,' uses five variables to determine whether a plasmid will thrive or fade away.
Researchers are exploring three approaches using the Wolbachia bacterium to control the buffalo fly population and prevent its spread southwards. The methods include artificially infecting adult flies or pupae, releasing sterile males into overwintering areas, and blocking transmission of nematodes closely related to Stephanofilaria.
A study by Dr. Cox's team reveals that radio-resistance in bacteria can be induced independently of desiccation, with complex genetic mutations and cellular metabolisms affected.
Scientists have developed a promising vaccine using HydroVax technology, conferring 83% immunity against Campylobacter-associated diarrhea. The vaccine targets a disease associated with infant growth stunting and malnutrition in developing countries, potentially improving the health of millions.
A team of UC Santa Barbara researchers proposes a technique called SPARC to manipulate certain parameters in a mathematical gut microbiome model toward a target composition. This approach offers a systematic understanding of how environmental factors and species interactions can be controlled to achieve a stable gut microbiome.
Researchers at IST Austria find that bacteria can copy genes as an adaptive strategy, creating genetic diversity and tuning gene expression levels. This mechanism allows for quick adaptation on ecological timescales, potentially impacting antibiotic resistance.
Lactococcus lactis bacteria use two amino acid transport systems to acquire methionine under low-methionine conditions. The choice of system is maintained over multiple generations, suggesting a strategy of bet-hedging or division of labor to adapt to changing environmental conditions.
Researchers discovered that bacteria, specifically Bacillus subtilis, can sense the ratios of different bacterial groups in their environment. This ability allows them to adjust their behavior and make informed decisions about their surroundings.
Researchers at UC San Diego create an inducible quorum sensing system that allows for precise control of single and multiple bacterial populations, regulated by p-coumaric acid. This new genetic circuit enables better control over tasks such as drug delivery and bioproduction.
A recent study found that a bacterium specifically kills male African monarch butterflies, leading to highly variable warning patterns. The researchers discovered that the bacterium's interaction with the female butterflies' unique chromosome arrangement causes this variability.
Research at MIT found that transient invaders can lead to a rapid takeover of the ecosystem, but then disappear. This phenomenon occurs when the invader's growth produces metabolic byproducts that raise the pH, making the environment less hospitable for itself and other species.
Researchers sequenced the genomes of 24 strains of Burkholderia bacteria from the ISS water dispenser and found them highly similar to Earth-based strains. The bacteria are susceptible to common antibiotics, making them treatable in the event of an infection.
Bacteria can coexist through a simple mechanism where movement drives ecosystem diversity and stability. The active migration of organisms can keep different bacterial strains together, allowing them to survive alongside each other.
A large human study found that gut microbiome composition and diversity are related to differences in personality, including sociability and neuroticism. People with larger social networks tend to have a more diverse gut microbiome, while those with higher stress or anxiety have lower diversity.
Exposure to pesticide atrazine alters wasps' gut microbiome, conferring resistance that is inherited across successive generations. The altered microbiome also increases tolerance to other pesticides like glyphosate.