Background Staphylococcus nepalensis is an emerging species first described in 2003 from the respiratory tract of goats in Nepal. We report the identification of S. nepalensis of a hypersaline lagoon in Brazil, along with in-depth phylogeographical and resistome analysis of publicly available genomes. Methods and results During a local survey from hypersaline aquatic environments in Rio de Janeiro, Brazil, two staphylococcal s...

Rays of the family Rhinopteridae Jordan & Evermann, 1896 are highly migratory and widely distributed in warm tropical and temperate waters. Along the Brazilian coast, the presence of two species has been recorded: Rhinoptera bonasus Mitchill, 1815 and Rhinoptera brasiliensis Müller, 1836. These stingrays are commonly caught as bycatch in trawl fisheries, however, the two species lack distinctive external morphological features...

Urban wastewater systems represent important interfaces between human activity and the environmental occurrence of antimicrobial resistance (AMR) markers. We assessed the temporal dynamics of intI1 , ermB , and the 16 S rRNA gene by quantitative PCR across three wastewater systems (EPC, CJC, and JW) in Fortaleza, Brazil, from November 2021 to November 2023. Bacterial communities were additionally characterized by 16 S rRNA gen...

Several bioceramics have been developed to promote bone repair. However, postoperative infections in the implanted area may led to in bone resorption. The widespread use of antimicrobials has contributed to the increased prevalence of multidrug-resistant bacteria, posing an additional challenge to therapeutics. This study aimed to evaluate the antimicrobial activity and resistance-inducing potential of two bioceramic formulati...

Wild animals often play a role in the transmission of zoonotic pathogens. Among the wild mammals of South America, ring-tailed coatis ( Nasua nasua ) can present a high frequency of anti- Leptospira antibodies and carry Leptospira spp. This study aimed to evaluate the frequency of serum anti- Leptospira antibodies and perform the molecular identification of Leptospira spp. in ring-tailed coatis living in the Tietê River Ecolog...

The anesthetic management of female dogs with mammary neoplasia, usually classified as ASA II and undergoing invasive procedures such as mastectomy and ovariohysterectomy, requires effective sedation and anesthetic stability due to the increased anesthetic risk associated with advanced age and underlying disease. In this context, this study aimed to evaluate the sedative effects and reduction in anesthetic requirements of a fu...

We investigated the effects of environmental temporality (temporary and permanent aquatic systems) and vegetation type on the beta diversity of aquatic macrophytes across major river basins in southern Amazonia. We analyzed aquatic macrophyte diversity across hierarchical basin scales, partitioning beta diversity into turnover and nestedness components, and related community composition to environmental temporality, vegetation...

Although microplastics (MPs) and polycyclic aromatic hydrocarbons (PAHs) are widespread in aquatic environments, their combined effects in freshwater systems remain poorly understood. This gap is relevant because green algae, frequently exposed to MPs, play an important role in PAHs bioremediation. This study evaluated how MPs influence the toxicity of benzo[a]pyrene (BaP) in the green microalga Raphidocelis subcapitata . A fu...

Main conclusion In miRNA–mRNA regulatory modules of Setaria italica , the candidate novel miRNAs Sit-miR74-N/APX7 and Sit-miR132-N/PEPC involved in key pathways underlying water-deficit response have been detected. In the first module, APX7 expression was directly associated with water-deficit intensity, whereas in the second module, PEPC activation occurred under moderate water deficit. Abstract Drought severely constrains pl...

Illegal cassiterite and monazite mining in the Taboca district of São Félix do Xingu, southeastern Amazonia, Brazil, reworks alluvial materials developed on the Paleoproterozoic Antônio Vicente Granite. This A-type granite is naturally rich in the REE-, Th- and U-bearing minerals monazite, xenotime and zircon, so mining further concentrates rare earth elements (REE), thorium and uranium whose concentrations are already raised...

Purpose This study established reliable natural geochemical backgrounds for Amazonian upland lakes and evaluated how lateritic catchment materials are transferred and transformed in lake sediments across Carajás, Araguaia, and Xingu. Methods Ferruginous duricrusts and lake sediments were analyzed using a robust median + 2×median absolute deviation (mMAD) approach to define regional inorganic and organic backgrounds. Source-to-...