We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Bacterial Diversity in Estuarine Sediments in Brazilian Coastal: a Focus in Bacterial Resistance
Summary
This paper is not about microplastics; it characterizes bacterial diversity and antibiotic resistance genes in estuarine sediments from Brazilian mangroves, examining how human effluents shape microbial communities.
ABSTRACT Estuaries are final depositional environments of sediments transported along rivers. Therefore, they give a generalized dimension about the human effluents released in water systems. The development of molecular techniques allowed the study of environmental DNA (eDNA), which can provide a real dimension about the functioning of the microbial communities of those environments and the impacts of human activities. In this context, antimicrobial resistance is an emerging problem, caused by irresponsible use of antimicrobial drugs in human and animal health, which has contributed to a selection of bacteria resistant to these drugs. The objective of this study is to identify the main phyla of bacteria and to detect the presence of Antibiotic Resistance Genes (ARGs) in different mangroves environments. We observed significant differences between ARGs quantity in each point. Samples collected on Guaibim-2 and Una had bigger diversity of ARGs, while Guaibim-1 had less AGRs diversity. The predominant phyla in all of the samples was Proteobacteria, Actinobacteria and Firmecutes. We detected Enterococcus faecium, Acinetobacter sp, Klebsiella pneumoniae, Enterococcus faecium and Enterobacter cloacae, listed bacteria for priority surveillance for World Health Organization on points Una and Guaibim-2.
Sign in to start a discussion.
More Papers Like This
[Effects of Microplastics on Antibiotic Resistance Genes in Estuarine Sediments].
Researchers investigated the effects of three types of microplastics on antibiotic resistance genes (ARGs) in estuarine sediment microcosms, finding that microplastic presence altered the persistence, abundance, and diversity of ARGs as measured by high-throughput quantitative PCR.
Impact of the surrounding environment on antibiotic resistance genes carried by microplastics in mangroves
Researchers buried five plastic types in mangrove ecosystems with different surrounding environments and used qPCR to quantify antibiotic resistance genes (ARGs) on the plastic surfaces, finding higher ARG abundance in urban mangroves than in protected or aquaculture areas. Polypropylene and HDPE were preferred substrates for ARG-carrying bacteria, and proximity to human activities was the main driver of ARG distribution.
Microplastics accumulation in mangroves increasing the resistance of its colonization Vibrio and Shewanella
Researchers found that microplastics accumulating in mangrove sediments harbored antibiotic-resistant bacteria, predominantly Vibrio parahemolyticus, Vibrio alginolyticus, and Shewanella, with 100% of mangrove isolates showing elevated resistance. The study highlights microplastics as ecological colonization sites that may amplify antibiotic resistance risks in coastal ecosystems.
Bacterial biofilms colonizing plastics in estuarine waters, with an emphasis on Vibrio spp. and their antibacterial resistance
Scientists characterized bacterial biofilms colonizing plastic debris in estuarine waters, finding that plastics host distinct communities including Vibrio species with elevated antibiotic resistance compared to surrounding water.
Effects of tidal action on the stability of microbiota, antibiotic resistance genes, and microplastics in the Pearl River Estuary, Guangzhou, China
Researchers used 16S rRNA gene sequencing to study microbial diversity and the distribution of antibiotic resistance genes and microplastics in the Pearl River Estuary across areas with different land uses. The study found that tidal action influenced the stability and distribution of microplastics and antibiotic resistance genes, with different land use types showing distinct patterns of contamination.