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61,005 resultsShowing papers similar to Impact of Exposure of Dairy Cow Feed to Polystyrene Microplastics on 24 h In Vitro Rumen Fermentation Responses, Microbiota Biodegradation Potential and Metabolic Pathways
ClearLow-Density Polyethylene Microplastics in the Rumen: Implications for Rumen Fermentation Dynamics and Utilization of Concentrate Feed
Researchers conducted the first in vitro study examining how polyethylene microplastics affect rumen fermentation in livestock. Both tested concentrations of microplastics significantly reduced gas production and altered fermentation patterns, while also decreasing the digestibility of feed nutrients. The findings suggest that microplastic contamination of animal feed could impair digestive efficiency in ruminants, with potential implications for livestock health and productivity.
Biodegradation of Polyethylene Terephthalate Microplastic in the Rumen of Cattle
Researchers incubated PET microplastics in cattle rumen fluid and found evidence of microbial colonization and partial polymer degradation by rumen microbiota, suggesting that ruminant digestive systems may harbor plastic-degrading microorganisms with potential bioremediation applications.
Degradation of Microplastics in an In Vitro Ruminal Environment
Researchers tested whether rumen microbes from cattle could break down common microplastics in a lab setting. They found modest degradation of low-density polyethylene and polyethylene terephthalate over 14 days, particularly with certain bacterial and fungal species. The study suggests that the rumen's microbial community may have limited but real potential to help reduce microplastic pollution in the livestock production chain.
Small polystyrene microplastics interfere with the breakdown of milk proteins during static in vitro simulated human gastric digestion
Researchers found that small polystyrene microplastics interfere with the digestion of milk proteins in a simulated human stomach environment. The microplastics adsorbed the digestive enzyme pepsin onto their surface, reducing its activity and slowing the breakdown of proteins like casein and whey. The study suggests that microplastic contamination in food could impair normal digestive processes in the human gut.
First Evidence of the Effects of Polyethylene Terephthalate Microplastics on Ruminal Degradability and Gastro-Intestinal Digestibility of Mixed Hay
Researchers provided the first evidence that polyethylene terephthalate microplastics can affect the digestive function of ruminant animals. Using an in vitro system simulating the ruminal and gastrointestinal tract, they found that PET microplastics at higher concentrations altered the degradability of hay feed. The study raises concerns about how microplastic contamination of livestock feed could impact animal nutrition and agricultural productivity.
The Effect of Rumen Microbiota in The Susceptibility of Subacute Ruminal Acidosis in Dairy Cows
Researchers studied how differences in rumen bacteria and fungi affect whether dairy cows develop a metabolic disease caused by high-grain diets. This gut microbiome research is not directly related to microplastics but is relevant to understanding how gut microbial communities influence susceptibility to environmental exposures.
Effect of Microplastic Contamination on In Vitro Ruminal Fermentation and Feed Degradability
Researchers tested the effects of three common microplastic types on rumen fermentation in lambs using an in vitro model. They found that microplastic contamination significantly disrupted fermentation dynamics, reduced feed degradability, and increased gas production. The results suggest that microplastic ingestion by livestock could impair digestive efficiency and nutrient absorption.
Effect of microplastic on rumen metabolism.
This review examines how microplastics and plastic additives including bisphenols and phthalates accumulate in water, soil, and animal feed and transfer into animal products such as milk, meat, and eggs, raising food safety concerns. The authors discuss microplastics as disruptors of rumen metabolism in livestock.
Quantitative and Qualitative Assessment of Microplastics in Drinking Water, Raw Materials, and Animal Feed Additives
Researchers assessed microplastic contamination in drinking water, feed ingredients, and complete diets at two dairy farms in Iran. The study found large numbers of microplastics of varying sizes and colors in feedstuffs, estimating that each cow ingests over 5,000 microplastic particles daily through their feed, raising concerns about potential transfer through the food chain.
Qualitative and quantitative analysis of microplastics in milk samples
Researchers analyzed microplastics in milk samples collected from branded products, dairies, and directly from cow sheds. They found microplastic particles present in the milk samples, with fibers being among the identified types. The study raises awareness about a potential dietary exposure pathway for microplastics through commonly consumed dairy products.
Fate of Plastics in Cattle Digestive Systems
Researchers detected plastic microfibers (0.5 to 15 mm) in the fecal matter of two herds of cattle on a college campus, demonstrating that cattle ingest microplastics at similar rates regardless of management differences, and raising concerns about plastic transfer through livestock products.
Toxicity Mechanisms of Microplastic and Its Effects on Ruminant Production: A Review
This review summarizes how microplastics enter ruminant animals like cattle and sheep through contaminated feed, water, and grazing on plastic-polluted land, and the health problems they cause. Microplastics can damage the gut lining, disrupt the rumen microbiome, cause inflammation, and impair nutrient absorption in livestock. Since ruminants are a major source of meat and dairy products, microplastic contamination in livestock raises questions about potential transfer to humans through the food chain.
Deciphering the role of polystyrene microplastics in waste activated sludge anaerobic digestion: Changes of organics transformation, microbial community and metabolic pathway
Researchers found that polystyrene microplastics in sewage sludge affected the anaerobic digestion process used to treat waste, with low concentrations slightly boosting methane production but high concentrations reducing it by up to 11%. The microplastics disrupted key bacterial communities and enzyme activities needed for proper waste breakdown. This matters because wastewater treatment plants handle enormous volumes of microplastic-laden sludge, and impaired digestion could reduce treatment effectiveness and release more pollutants into the environment.
Impact of a real food matrix and in vitro digestion on properties and acute toxicity of polystyrene microparticles
Researchers examined how interaction with milk as a real food matrix and subsequent digestion affects the properties and toxicity of polystyrene microparticles. The study found that milk proteins form a corona on the particles that alters their surface charge and behavior, suggesting that the food context significantly influences how microplastics behave in the gastrointestinal tract.
Emerging Health Risks Associated with the Intake of Microplastics Found in Milk and Dairy Products
Researchers assessed health risks from microplastics found in various milk and dairy products, including conventional, organic, and raw varieties. They found that yogurts showed consistently higher associations with certain polymer contaminations, and strong correlations existed between microplastic concentration and exposure-related risk parameters. The study suggests that routine consumption of contaminated dairy products represents an emerging dietary exposure pathway for microplastics.
Assessing microplastic contamination in milk and dairy products
Researchers tested 28 dairy samples and found microplastics in all of them, with ripened cheese containing the highest levels at about 1,857 particles per kilogram, followed by fresh cheese and milk. The most common plastics found were PET, polyethylene, and polypropylene, likely coming from packaging materials, confirming that dairy products are another route of microplastic exposure for humans.
Nano-and Microplastics Migration from Plastic Food Packaging into Milk and Dairy Products: Impact on Nutrient Digestion, Absorption, and Metabolism
This review examined how nano- and microplastics migrate from plastic food packaging into milk and dairy products, discussing their potential impacts on nutrient digestion, absorption, and metabolism in the human body.
Presence of Microplastics in Livestock Production: A Challenge for Animal Health and Sustainability
This review examines microplastic contamination in livestock production systems, summarizing evidence of microplastic presence in feed, water, and animal tissues, and discussing implications for animal health, food safety, and sustainability.
Investigation of Microplastics in Digestion System: Effect on Surface Microstructures and Probiotics
Researchers investigated how the digestive system affects five common microplastic types and found that digestion altered the surface microstructures of the particles while also negatively impacting probiotic bacteria, suggesting potential health risks from ingested microplastics.
Microplastics contamination in ruminant feeds of Northwestern Italy: a preliminary assessment
Researchers measured microplastic contamination in common cattle feeds at dairy farms in northwestern Italy, including corn silage, hay, and high-protein feedstuff. All feed types contained microplastics, with corn silage being the most contaminated at about 38 particles per gram. Since microplastics in animal feed can transfer into meat and dairy products, this finding highlights a potential route of human exposure through the food we eat.
Impacts of polystyrene microplastic on the gut barrier, microbiota and metabolism of mice
Researchers exposed mice to polystyrene microplastics for six weeks and found that the particles accumulated in the gut, reduced protective mucus secretion, and damaged the intestinal barrier. The microplastics also significantly altered the composition of gut bacteria, decreasing beneficial species and increasing harmful ones. The study suggests that microplastic ingestion could disrupt gut health in mammals by simultaneously impairing the physical barrier and reshaping the microbiome.
Süt Ve Süt Ürünleri̇nde Mi̇kroplasti̇k Varliği, Sağlik Üzeri̇ne Etki̇leri̇ Ve Mi̇kroplasti̇k Ayirma Yöntemleri̇
This review examines the presence of microplastics in milk and dairy products, the analytical separation methods used to detect them, and potential health effects associated with dairy-sourced microplastic exposure. The authors discuss how plastics used in dairy packaging and processing equipment degrade into microparticles that contaminate food products, posing a global public health concern.
Polypropylene micro- and nanoplastics affect the digestion of cow's milk proteins in infant model of gastric digestion
Researchers found that polypropylene micro- and nanoplastics, commonly released from baby bottles during heating, interfere with the digestion of milk proteins in a simulated infant stomach model. The plastic particles bound to milk proteins and changed how they were broken down by digestive enzymes, with the effect being stronger in the infant model than in the adult model. This is concerning because incomplete protein digestion in infants could affect nutrient absorption during a critical period of growth and development.
Dietary exposure and risk assessment of plastic particles in cow’s milk stored in various packaging materials
Researchers compared plastic particle contamination in cow's milk stored in different types of packaging and found that milk in multilayer containers had more plastic particles than milk in PET or glass bottles. This matters for human health because millions of people drink milk daily, and the packaging itself may be adding plastic contaminants to a staple food.