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61,005 resultsShowing papers similar to First report of detection of Toxoplasma gondii DNA in oysters (Crassostrea sp.) in the state of Maranhão
ClearToxoplasma gondii in Marine Life of Italian Coasts, What Do We Know So Far?
This paper is not about microplastics; it reviews the presence of the parasite Toxoplasma gondii in marine mammals, fish, and mollusks along Italian coasts, finding the pathogen in all animal groups tested and calling for routine food-market screening to prevent human outbreaks.
Profiling microplastics in the Indian edible oyster, Magallana bilineata collected from the Tuticorin coast, Gulf of Mannar, Southeastern India
This study quantified microplastic contamination in the Indian edible oyster Magallana bilineata collected from India's Gulf of Mannar, finding plastic particles in the majority of oysters sampled. Given the importance of oysters to local diets and fisheries, the results raise direct concerns about human dietary exposure to microplastics through seafood consumption in coastal India.
Microplastics and linear alkylbenzene levels in oysters Crassostrea gigas driven by sewage contamination at an important aquaculture area of Brazil
Researchers found microplastic fibers in oysters from all six farming areas surveyed in southern Brazil, with contamination levels of sewage markers and microplastics correlating with proximity to urban sewage discharge, highlighting risks to both aquaculture quality and food safety.
Microplastics Facilitate Protozoan Pathogen Contamination in Shellfish
Researchers found that microplastics can facilitate the contamination of shellfish with disease-causing parasites including Cryptosporidium, Giardia, and Toxoplasma. Oysters exposed to both protozoan pathogens and polyester microfibers harbored significantly more parasites than those exposed to pathogens alone, suggesting microplastics may serve as vectors that increase pathogen levels in seafood.
First register of microplastic contamination in oysters (Crassostrea gasar) farmed in Amazonian estuaries
This is the first study to document microplastic contamination in farmed oysters from the Amazon region of Brazil, finding that 58% of the oysters contained microplastics, mainly nylon fibers. The particles accumulated most in the oysters' digestive glands and reproductive organs. Since oyster farming is an important food source and livelihood in the Amazon, the findings highlight a need for better monitoring and depuration systems to reduce human exposure to microplastics through shellfish.
Oysters and mussels as equivalent sentinels of microplastics and natural particles in coastal environments
Researchers compared how oysters and mussels accumulate microplastics in a polluted Brazilian estuary and found both species performed equally well as biological monitors of contamination. Some of the highest microplastic levels ever recorded in shellfish were found at the most polluted sites. Since oysters and mussels are widely consumed as seafood, these contamination levels raise direct concerns about human microplastic exposure through shellfish consumption.
Molecular Epizootiology of Toxoplasma gondii and Cryptosporidium parvum in the Eastern Oyster (Crassostrea virginica) from Maine (USA)
Researchers investigated the prevalence of Toxoplasma gondii and Cryptosporidium parvum in Eastern oysters from six sites along the Maine coast over 2016-2017, finding T. gondii in 31% and C. parvum in 10% of oysters, with T. gondii prevalence spiking to 100% at some sites in September 2017.
Microplastic in clams: An extensive spatial assessment in south Brazil
Researchers assessed microplastic contamination in clams collected from extensive coastal regions of southern Brazil. They found microplastics in the soft tissues of clams across all sampling sites, with contamination levels influenced by proximity to urban areas, rivers, and local water flow patterns. The study highlights that even organisms in less urbanized coastal areas are accumulating microplastics, raising concerns about widespread contamination in shellfish habitats.
Microplastics exposure in European flat oyster, Ostrea edulis: Evaluation of accumulation and depuration under controlled conditions and molecular assessment of a set of reference genes
Researchers assessed microplastic exposure, accumulation, and depuration in European flat oysters (Ostrea edulis), a species of conservation and aquaculture interest. Oysters accumulated microplastics efficiently and required extended depuration periods to substantially reduce body burdens, with implications for food safety.
Microplastic contamination in filter-feeding oyster Saccostrea cuccullata: Novel insights in a marine ecosystem
Researchers examined microplastic contamination in the filter-feeding oyster Saccostrea cuccullata collected from five coastal sites. They found microplastics present in all oyster specimens, with fibers and fragments being the most common types detected. The study highlights how filter-feeding shellfish can accumulate microplastics from surrounding waters, raising concerns about contamination in marine food chains.
Microplastic contamination in the mangroves of Piraquê-Açu and Piraquê-Mirim rivers, Aracruz (Brazil): An analysis in sediment, water, and biota
Researchers found widespread microplastic contamination in a Brazilian mangrove ecosystem, detecting over 7,800 particles across water, sediment, and two species of shellfish consumed by local communities. Oysters contained higher microplastic levels than mussels, and sediments served as the main collection point for the particles. Since these shellfish are an important food source, the contamination represents a direct pathway for human microplastic ingestion.
Occurrence of microplastics in wild oysters (Crassostrea tulipa) from the Gulf of Guinea and their potential human exposure
Researchers found that 84% of wild mangrove oysters from Ghana's coast had ingested microplastics, with fibers being the most common type, highlighting potential human health exposure through seafood consumption in the Gulf of Guinea.
Occurrence of microplastics in bivalve molluscs Anomalocardia flexuosa captured in Pernambuco, Northeast Brazil
Researchers documented microplastic contamination in bivalve molluscs (Anomalocardia flexuosa) from estuaries in northeastern Brazil, finding widespread presence of microplastics in shellfish consumed by traditional communities, raising concerns about human dietary exposure.
Occurrence of microplastics and heavy metals accumulation in native oysters Crassostrea Gasar in the Paranaguá estuarine system, Brazil
Researchers examined native oysters from the Paranagua estuarine system in Brazil for both microplastic contamination and heavy metal accumulation. They found high levels of microplastics in all oyster samples, along with elevated concentrations of several heavy metals, and observed potential interactions between the two pollutant types. The study raises concerns about the combined exposure risks from microplastics and heavy metals in seafood harvested from polluted estuaries.
Contamination by microplastics in oysters shows a widespread but patchy occurrence in a subtropical estuarine system
Researchers examined microplastic contamination in oysters across a subtropical estuarine system and found widespread but highly variable levels of pollution. Higher contamination generally correlated with areas of greater human activity, though unexpectedly high levels were also found in remote marine protected areas. The study found that 94 percent of oyster samples contained microplastics, suggesting these bivalves could serve as indicators of environmental contamination.
Oyster Reefs Are Reservoirs for Potential Pathogens in a Highly Disturbed Subtropical Estuary
Researchers investigated oyster reefs in a highly disturbed subtropical estuary as reservoirs for potential pathogens, finding that both indigenous and non-indigenous pathogenic and potentially pathogenic microbes accumulate in reef-associated sediments and biota. The study highlights how deteriorating water quality and benthic conditions coincide with elevated pathogen detection in estuarine reef environments.
Assessment of microplastics in oysters in coastal areas of Taiwan
Microplastics were quantified in oysters from 22 sites along Taiwan's coastlines, providing a comprehensive baseline for MP contamination in commercially farmed and wild oysters across different coastal zones.
Microplastic contamination in marine mussels from the Atlantic coast of North Portugal and human risk of microplastic intake through mussel consumption
Researchers analyzed wild mussels from Portugal's Atlantic coast and found microplastics in all samples, with an average of about 1.6 particles per gram of mussel tissue. Based on typical Portuguese seafood consumption patterns, the estimated annual human intake of microplastics from mussels alone was calculated, highlighting that regular shellfish consumers face meaningful microplastic exposure through their diet.
Ostreopsis cf. ovata Bloom in Currais, Brazil: Phylogeny, Toxin Profile and Contamination of Mussels and Marine Plastic Litter
Researchers documented an Ostreopsis cf. ovata harmful algal bloom in Brazil and found that marine plastic litter collected during the bloom was contaminated with the algae and their toxins, suggesting that plastics can serve as vectors for toxic microalgae. The study raises concerns about how floating plastics could spread harmful algal species and their toxins across ocean regions.
Are bivalves a source of microplastics for humans? A case study in the Brazilian markets
Researchers found that all four species of bivalves sold in Brazilian markets contained microplastics, averaging 1.64 particles per gram, confirming that commercially sold shellfish are a source of microplastic exposure for consumers.
Association of Zoonotic Protozoan Parasites With Microplastics in Seawater: Implications for Human and Wildlife Health
This study found that the human parasites Toxoplasma gondii, Cryptosporidium, and Giardia can adsorb to the surface of polyethylene microbeads and polyester microfibers. The discovery that microplastics can carry waterborne pathogens raises a new public health concern — that microplastic pollution in coastal waters may concentrate and transport disease-causing organisms that could infect both wildlife and humans.
Microplastics in coastal and marine environments: A critical issue of plastic pollution on marine organisms, seafood contaminations, and human health implications
This review highlights the serious threat microplastics pose to marine life and the millions of people who depend on seafood as a primary protein source. Marine organisms, especially filter-feeders like oysters and mussels, accumulate microplastics that can cause tissue damage, oxidative stress, immune changes, and behavioral problems. Since these shellfish are often eaten raw, any toxins they accumulate -- including microplastics -- pass directly to humans.
Effects of Microplastics Associated with Triclosan on the Oyster Crassostrea brasiliana: An Integrated Biomarker Approach
Brazilian oysters (Crassostrea brasiliana) were exposed to microplastics alone and in combination with the antibacterial chemical triclosan, with combined exposure causing greater oxidative stress, immune disruption, and genotoxicity than either stressor alone.
Abundance, composition, and distribution of microplastics in intertidal sediment and soft tissues of four species of Bivalvia from Southeast Brazilian urban beaches
Researchers found 100% microplastic contamination in intertidal sediments and four bivalve species from urbanized Brazilian beaches, identifying polypropylene, polyethylene, and PET polymers in organisms commonly consumed by humans.