Michael J Sadowsky

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This study looked at how urban estuaries, which are important for both the environment and economy, are affected by germs from human activities like wastewater and runoff. Researchers found that there’s a big challenge in figuring out where these germs come from, as well as how water movement and sediment impact their spread, and they highlight issues with current methods used to monitor these pathogens. To improve safety and management in these areas, new techniques like tracking germs back to their sources and advanced monitoring tools are suggested. Who this helps: This benefits city planners, environmental scientists, and public health officials.

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This research looked at a chemical called para-cresol (p-cresol) linked to autism spectrum disorder (ASD) and found that children with ASD often have higher levels of this substance in their urine. In fact, studies showed that these elevated levels of p-cresol can negatively affect the gut, brain, and immune system, leading to symptoms associated with autism. Importantly, treatments like fecal microbiota transplants significantly reduced p-cresol sulfate levels in children and improved both gastrointestinal and autism-related symptoms. Who this helps: This benefits children with autism and their families by providing new treatment options.

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Researchers studied three types of bacteria from rice paddy soil in Korea to see how they handle nitrate (a form of nitrogen) under oxygen-rich conditions. They found that these bacteria could not only convert nitrate into ammonium but also had the necessary genes to do so effectively, even when oxygen was available. Specifically, the bacteria reduced nitrate in different ways depending on the availability of nitrogen, which could significantly influence soil health and nutrient cycling. Who this helps: This research benefits farmers and environmental scientists focusing on soil health and sustainable farming practices.

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This study looked at how the community of fungi in the gut (the mycobiome) develops during the first two years of a child's life and what factors influence its composition. Researchers found that the variety of fungi increased over this time, with certain factors like breastfeeding and exposure to antibiotics affecting the mycobiome’s makeup. Both methods used to analyze the samples found similar results, showing that gut fungi evolve in a consistent way as children grow. Who this helps: This helps doctors and researchers understand childhood gut health, which can improve guidance for parents on feeding and antibiotic use.

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This study looked at bacteria found in the surface sediments of Lake Villarrica in Chile, specifically focusing on their ability to resist multiple antibiotics and break down herbicides. Researchers found that all sediment samples contained genes linked to antibiotic resistance and herbicide breakdown. Notably, they identified 46 strains of bacteria that were resistant to multiple antibiotics, and over half of these could use herbicides as food, which raises concerns about pollution in the lake. Who this helps: This information helps environmental scientists and public health officials monitor and manage contamination in freshwater systems.

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This study looked at sources of fecal contamination in saltwater areas, particularly before and after heavy rainstorms, in Vaughn Bay, Washington. Researchers found that birds and humans were the main contributors to this pollution, especially after storms when contamination levels increased, indicating that further examination of local septic systems is necessary. Understanding these contamination patterns is crucial for protecting marine ecosystems and supporting shellfish farming. Who this helps: This helps local environmental agencies and shellfish growers.

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This research focused on creating a new drinkable form of fecal microbiota for patients suffering from repeated Clostridioides difficile infections, particularly those who struggle to take pills. The results showed that this drinkable solution effectively disrupted the cycle of infection in all three elderly patients tested, allowing them to better manage their condition. This matters because it provides an accessible treatment option for those who need multiple therapies but cannot swallow capsules. Who this helps: This helps patients with recurrent Clostridioides difficile infections, especially the elderly or those unable to take capsules.

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This study examined how different sulfur-containing compounds in our diet affect the production of hydrogen sulfide (HS) by gut bacteria. Researchers found that cysteine led to the highest HS levels at an average of 16.7 parts per million, compared to much lower levels from sodium sulfate (0.7 ppm) and taurine (0.8 ppm). Understanding this process is important because high levels of HS can be toxic and are linked to gut disorders, which could help doctors in identifying and managing conditions like ulcerative colitis. Who this helps: Patients with gastrointestinal disorders.

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This study examined the types and roles of bacteria in the sediments of Lake Villarrica in southern Chile, which has become overloaded with nutrients like phosphorus and nitrogen. Researchers found a rich variety of bacteria in heavily impacted areas, with key bacteria families identified that are important for nitrogen cycling, such as those involved in nitrification and denitrification. Understanding these bacterial communities is crucial for developing effective conservation and clean-up strategies for the lake. Who this helps: This research benefits environmental scientists and policymakers involved in lake management and conservation efforts.

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This research paper looks at using special bioreactors filled with woodchips to help remove nitrate, a common pollutant from farming runoff, which can harm water quality and public health. The bioreactors work by allowing bacteria to convert nitrate into harmless gas, thus cleaning the water. Studies have shown these systems can effectively remove nitrate, making them a cost-effective solution for farmers to manage agricultural wastewater. Who this helps: This helps farmers, environmentalists, and communities affected by agricultural runoff.

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Researchers studied how to improve woodchip bioreactors, which help remove harmful nitrate from farm runoff, especially during cold weather when their effectiveness drops. They found that adding cold-adapted microbes and extra carbon increased the performance of these bioreactors by enhancing microbial activity. This is important because it offers a way to better tackle nitrate pollution in agricultural areas, which can harm water quality and the environment. Who this helps: This helps farmers and environmental managers working to reduce nitrate pollution.

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This study looked at how fecal microbiota transplantation (FMT) affects urine markers in patients and mice, focusing on a substance called -cresol sulfate. Researchers found that levels of -cresol sulfate in urine increased quickly after FMT, making it a reliable indicator of changes in gut bacteria. This is important because it can help doctors monitor how well treatments are working for patients with recurring infections and other gut-related issues. Who this helps: Patients undergoing fecal microbiota transplantation and their doctors.

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This study looked at how specific soil bacteria can help plants absorb arsenic, a harmful pollutant, from the ground. The researchers found that certain bacteria increased the amount of arsenic available in the soil and helped plants take up up to 43% more arsenic compared to plants without the bacteria. This is important because it shows a way to enhance the ability of plants to clean up arsenic-contaminated soils, potentially improving the environment and protecting human health. Who this helps: This helps patients living near contaminated sites, environmental scientists, and agricultural workers.

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This study explored the role of a specific bacterium, Cutibacterium acnes, in the gut of a marine worm called Capitella teleta. Researchers found that this bacterium helps the worm by producing important nutrients like propionate and vitamin B, which are vital for the worm's health. They discovered that populations of C. acnes increased when the worms were treated with antibiotics, indicating the bacterium plays a key role in the worm's digestive system and overall survival. Who this helps: This benefits researchers studying marine life and the relationships between gut bacteria and their hosts.

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This study focused on improving the accuracy of detecting SARS-CoV-2, the virus that causes COVID-19, in wastewater. Researchers found that without standardized procedures, there is a risk of false-positive and false-negative results when analyzing wastewater samples. They recommend strict quality checks and better sampling methods to ensure accurate surveillance, which is crucial for monitoring community infection rates. Who this helps: This benefits public health officials and researchers monitoring disease outbreaks in communities.

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This study looked at how climate change affects the germs and microbes found in beach sand and water, which is important for human health. Researchers found that rising temperatures and changing weather patterns increase microbial contamination, which could make beaches unsafe for swimming. They emphasize that current safety standards for beaches might not be enough in a warming world, suggesting that new guidelines are needed to keep beachgoers safe. Who this helps: This benefits beachgoers and public health officials.

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This study looked at how salt-tolerant plants, called halophytes, affect the bacteria and fungi in the soil around their roots in salty environments. Researchers found that the soil around halophytes had more diverse and complex microbial communities compared to regular soil, with fungal connections in the rhizosphere being much higher (13-73% compared to just 3% in bulk soil). This matters because increased microbial diversity and activity can help improve soil health and ecosystem functions in saline areas, which is crucial for sustainable development. Who this helps: This helps farmers and environmentalists working to restore and manage saline lands.

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This study looked at how different diets—animal-based and plant-based—affect the production of hydrogen sulfide (HS) in healthy people. Researchers found that, on average, people produced 29 parts per million more HS after eating an animal-based diet compared to a plant-based diet. This is important because high levels of HS are linked to digestive diseases like ulcerative colitis and colon cancer. Who this helps: This helps patients seeking to improve their gut health and reduce disease risk through dietary choices.

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This study looked at how planting trees (afforestation) affects the tiny living things (microbes) in the deep soil layers of a dry region in China over 20 years. Researchers found that planting trees led to a drop in the variety and effectiveness of these microbes in deeper soils, with a 30% decrease in certain microbial functions and increased carbon limitations. Understanding these changes is crucial because deep soil health directly impacts the overall success and sustainability of forest ecosystems in dry areas. Who this helps: This benefits environmental scientists and farmers looking to restore ecosystems and improve soil health.

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Researchers studied the types and functions of bacteria in the sediments of spouting pools at the El Tatio Geyser field in Chile. They found that the bacteria mostly belonged to groups called Proteobacteria and Firmicutes, and they play important roles in breaking down organic matter and cycling nutrients like sulfur and nitrogen. Understanding these bacteria is crucial not only for grasping the ecosystem's complexity but also for developing effective conservation plans because the area is visited by many tourists each year. Who this helps: This benefits conservationists and environmental planners.

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Researchers studied how fecal microbiota transplantation (FMT) can effectively treat recurring Clostridioides difficile infections that don’t respond to antibiotics. FMT has proven to work well, but more research is needed to understand why it’s effective and to develop safer and more effective treatments. This is important because it could improve care for patients suffering from this difficult infection. Who this helps: Patients battling recurrent C. difficile infections.

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This study looked at how quickly different harmful bacteria and viruses decay in freshwater environments that imitate sub-tropical conditions, focusing on things like E. coli and other pathogens. It found that E. coli and a specific marker gene broke down much faster than some viruses and pathogens, indicating that just because these bacteria are gone doesn't mean the harmful germs are too. Significantly, microorganisms last longer in cooler temperatures, which means water safety measures need to adapt based on seasonal changes to protect public health. Who this helps: This benefits public health officials and water safety managers.

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This study looked at how a type of marine worm, Capitella teleta, changes the tiny life forms in ocean floor sediment by eating and excreting sediment particles. The researchers found that when the worms ingest and defecate sediment, it significantly changes the types of microbes present, especially those that help with sulfur and carbon cycles. This matters because it shows that these worms help to manage nutrient cycling in ocean sediments, making them important for a healthy marine ecosystem. Who this helps: This benefits ecologists and marine biologists studying ocean health and nutrient cycles.

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This study looked at how changes in temperature and salinity affect the bacteria living inside zebra mussels, which are invasive shells found in North America. Researchers found that high temperatures were the main cause of zebra mussel deaths, with mortality rates between 53% and 100%, and that these conditions led to a rise in harmful bacteria, particularly a type called Aeromonas. Understanding these effects is important because it helps manage zebra mussel populations and protect ecosystems they invade. Who this helps: This helps environmental scientists and conservationists.

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This study looked at how to identify the production of methane gas in stool samples from 33 healthy people. Researchers found that a specific group of microbes, particularly a type called Methanobrevibacter, was present in higher amounts in samples that produced methane. They established a clear cutoff for detecting methane production: 0.097% of the microbes had to be Methanobrevibacter, or there had to be at least 5.2 x 10 copies of a specific gene in the sample. This information is important because it could lead to a quick and easy test for doctors to assess whether a patient produces methane, which may relate to certain health conditions. Who this helps: This helps doctors better diagnose and treat patients with gastrointestinal issues.

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Researchers studied the air bacteria in the Amazon rainforest to see how the different seasons affect them. They found that changes in temperature, humidity, and rainfall significantly influenced the types of bacteria present in the air, but the bacteria were similar at both ground and tree-top levels. This matters because understanding these seasonal fluctuations helps us learn more about how the rainforest affects the wider environment and climate. Who this helps: This helps scientists and environmentalists studying climate change and ecosystem health.

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This study looked at new technologies to identify the sources of fecal pollution in the environment, which is a serious problem because it can introduce harmful bacteria into our water systems. Researchers found that advances in techniques like metagenomics and machine learning can more accurately trace the sources of this contamination, moving beyond older methods that relied heavily on growing bacteria in a lab. This is important because it helps us understand where pollution comes from, making it easier to tackle the issue and protect public health. Who this helps: This helps patients, communities, and environmental health professionals.

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This study looked at two ways to deliver beneficial bacteria (from freeze-dried fecal matter) to treat a recurring gut infection caused by Clostridioides difficile. Researchers found that delivering the bacteria through a colonoscopy allowed for quicker and more successful establishment of these bacteria in the gut, achieving higher levels of donor bacteria within days compared to when they were taken by mouth. Specifically, patients receiving the colonoscopic treatment showed significant increases in certain bacterial families that are important for gut health. Who this helps: This research benefits patients suffering from recurrent Clostridioides difficile infections by highlighting a more effective treatment method.

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This study looked at how soil erosion affects the tiny living organisms in the soil, specifically their diversity and how well they can perform different tasks that support the ecosystem. The researchers found that eroded areas had less variety in these microbial communities, with specific groups like Proteobacteria and Bacteroidetes becoming less common, while some families that help with nitrogen processing increased. This is important because diverse and functional soil microbes are crucial for maintaining healthy soil, which in turn supports plant growth and overall ecosystem health. Who this helps: This helps farmers and land managers by showing the importance of preventing soil erosion to maintain healthy soil.

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This study focused on how a specific bacterium, Paraburkholderia phymatum, affects the community of bacteria around the roots of the Mimosa pudica plant. The researchers found that after introducing P. phymatum, 13 types of bacteria changed in abundance in the area around the roots, while the surrounding soil remained largely unchanged. This matters because understanding how these beneficial microbes interact can help improve agricultural practices by enhancing plant growth and nutrient absorption. Who this helps: This benefits farmers and agricultural scientists looking to boost crop production sustainably.

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This paper addresses changes in bacterial communities caused by disruptions in their communication signals. The researchers found that interference in these signals can lead to significant shifts in the types and numbers of bacteria present, which can impact health. Understanding these changes is crucial because they can affect how bacteria interact and function in our bodies. Who this helps: This helps doctors and researchers studying infections and gut health.

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This study focused on developing modified bile acids that can be used as treatments for conditions affecting the gut, like infections and inflammatory bowel disease. The researchers found that adding a sulfate group to certain bile acids makes them less absorbable and increases the amount that is expelled in feces, which is important for gut-targeted therapies. They also created a new compound that combines a methoxy group and a specific sugar to improve the effectiveness of the treatment while keeping it mostly restricted to the gut. Who this helps: This benefits patients with gut-related diseases, such as inflammatory bowel disease and infections.

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This study looked at a new method to track a specific bacterial strain (B510) in soil and plants using a technique called CRISPR loci-PCR. The researchers found that this method was effective in detecting strain B510 in soil and plant systems, showing it was present after two weeks of inoculation, even in different conditions. This matters because it provides a faster and more precise way to monitor beneficial bacteria in agriculture, which can improve farming practices and crop health. Who this helps: This benefits farmers and agricultural scientists looking to enhance soil health and crop performance.

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The study looked at certain types of bacteria from a desert plant that can help tomato seeds and seedlings grow better when there is not enough water. They found that tomato plants treated with these beneficial bacteria grew between 48 to 60 centimeters tall and weighed 171 to 214 grams, compared to untreated plants that only reached heights of 37 to 51 centimeters and weighed 146 to 197 grams. This matters because it shows a new way to help tomatoes thrive in dry conditions, which is important for farmers dealing with droughts and water shortages due to climate change. Who this helps: This helps farmers and gardeners who grow tomatoes in dry areas.

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This study looked at how antibiotic resistance genes from bacteria can be passed around in multi-drug resistant bacteria found in fish farms in South Korea. Researchers found 24 antibiotic resistance genes linked to 95 mobile genetic elements, which help these genes spread. Notably, 22 out of 24 resistance genes were located near these genetic elements, indicating they can easily transfer between bacteria, which is important for understanding the risks of antibiotic resistance in the environment. Who this helps: This helps patients and doctors by providing insights into how antibiotic resistance spreads, which can inform better treatment and prevention strategies.

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This study looked at how pollution from a wastewater treatment facility in Mexico affects water quality along the coast of the Southwest United States. Researchers found that human fecal pollution extended about 11 miles north from the discharge point, with levels heavily influenced by ocean conditions. This is important because it shows how pollution can travel across borders, helping authorities manage and mitigate water quality issues effectively. Who this helps: This helps coastal communities and environmental regulators.

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This study looked at the gut bacteria of sea lamprey at different points in their life cycle: as larvae, as parasitic juveniles, and as adults. Researchers found that the types of bacteria present changed significantly at each stage—specifically, the transition to the parasitic juvenile stage saw a shift in bacterial communities and a decline in diversity. Understanding these changes is important because they may help explain how gut bacteria influence the growth and health of sea lamprey. Who this helps: This benefits researchers studying aquatic health and potentially informs conservation efforts for sea lamprey populations.

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This research looks at how changing climate conditions are causing new plant diseases to emerge and how specific types of soil can naturally help protect crops from these diseases. The study highlights that healthy soils with the right microorganisms can reduce disease incidents, and suggests a way to enhance these beneficial microbes to better defend against pathogens and cope with climate stresses. This is important because it offers a natural method to improve crop resilience as environmental conditions change. Who this helps: Farmers and agricultural scientists.

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This study looks at the tiny living things in the guts of sea lampreys at various stages of their life. Researchers found that the types of bacteria varied significantly depending on the age of the lamprey, showing three distinct patterns. Understanding these differences is important because it can help in managing lamprey populations that can harm other species. Who this helps: This helps scientists and conservationists working to control sea lamprey populations.

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This study looked at how taking daily aspirin affects the gut bacteria of healthy adults aged 50 to 75. Researchers found that after six weeks, the group taking aspirin had changes in their gut bacteria compared to those taking a placebo; specifically, certain bacteria linked to a lower risk of colorectal cancer increased, while others associated with higher risk decreased. These results are important because they suggest that aspirin may help reduce the risk of colorectal cancer by changing the gut microbiome. Who this helps: This helps patients at risk for colorectal cancer.

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This research paper reviews advancements in Microbial Source Tracking (MST) methods, which help identify the sources of fecal contamination in water. It highlights how traditional methods are not reliable and explains how new DNA sequencing techniques paired with machine learning can analyze large amounts of data to pinpoint where contamination comes from. This matters because accurately identifying contamination sources can improve water safety and public health. Who this helps: This helps public health officials and environmental scientists who work to ensure clean and safe water.

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This study focused on creating a simple method for producing and cleaning spores from a harmful bacterium that causes prolonged diarrhea. The researchers developed a protocol that can be used in any lab with a portable glove bag, making it easier to work with these spores in a controlled environment. This method improves previous techniques and includes a troubleshooting guide to help other scientists. Who this helps: This benefits researchers studying infections and developing treatments for affected patients.

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This study looked at how different treatments around bariatric surgery, specifically vertical sleeve gastrectomy (VSG), affect the bacteria in the intestines. Researchers found that the use of regular antibiotics before and after the surgery significantly changed the gut bacteria in patients, compared to those who only had dietary changes or who received a different antibiotic with less effect. This matters because understanding how these treatments influence gut health can improve outcomes for patients after weight-loss surgery. Who this helps: This helps patients undergoing bariatric surgery.

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This study looked at how certain bacteria can break down harmful herbicides used in farming. The researchers found that using a community of diverse bacteria, rather than just single strains, is more effective for cleaning up herbicide pollution because these groups communicate and work together better. This matters because it can lead to safer farming practices and less environmental damage, especially in developing countries that rely heavily on pesticides. Who this helps: Farmers and communities in agricultural regions.