Eimeria lata is a recently characterized species of domestic chicken whose sensitivity to anticoccidial drugs remains largely unknown. This study aimed to determine the anticoccidial sensitivity profile of the Brazilian E. lata BR-AMC isolate, obtained from alternative production systems, through an anticoccidial sensitivity test (AST). One hundred ninety-two broiler chicks were allocated into six treatment groups: unmedicated...

Cetaceans are highly adapted marine mammals whose survival depends on precise auditory and echolocation systems. Therefore, disease processes affecting these systems, including parasitic infections pose significant morbidity and may result in stranding and death. Here, we describe the pathologic and parasitological findings in an adult, male melon-headed whale ( Peponocephala electra ) stranded dead on the Brazilian coast. The...

The salivary glands of hematophagous arthropods possess a remarkable molecular diversity, reflecting evolutionary adaptations to blood feeding lifestyle and vector-host interactions. In this study, we characterized the salivary-gland transcriptome of adult female Simulium pertinax , a medically important black fly species widely distributed in South America. Through RNA sequencing and bioinformatics analyses, we identified 15,...

Alphaviruses, including Mayaro virus (MAYV) and Chikungunya virus (CHIKV), pose a growing public health threat, with increasing reports worldwide and no licensed antiviral treatments available. This study evaluated the antiviral activity of pyridine-3-carbohydrazide (P-3-C) against MAYV (strains BeAr and TRVL) and CHIKV (strain La Reunion, LR). Vero E6 or U-2OS cells were infected and treated with P-3-C for 24 h, and cell viab...

Purpose Vascular dysfunction is a pathophysiological mechanism in peripheral artery disease (PAD). PAD patients exhibit reduced circulating expression of microRNA-126 (c-miRNA-126) and VEGF. Submaximal walking (SW) is recommended in PAD because it increases walking capacity, partially by improving vascular regulation, which can be observed after a walking session. Nevertheless, previous studies were conducted with maximal walk...

Aim We investigate the distribution of dispersal modes — endozoochory (via animal ingestion), synzoochory (via animal seed accumulation) and anemochory (via wind)—and seed mass of woody plants across Brazilian ecosystems, testing whether their relative abundance in local plant communities could be predicted by climate, edaphic factors and dispersal agents (e.g., the main vectors moving seeds). We expected climate to be the mai...

Brain cancers hijack biological systems involved in neural development and synaptic plasticity. Medulloblastoma (MB), the most common malignant brain tumor in children, is thought to arise from disruptions in neurodevelopmental programs. Glutamatergic transmission mediated by α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors (AMPARs) has been implicated in synaptic communication between adult brain tumors a...

Understanding how hydroclimatic (HC) and land use and land cover (LULC) variabilities affect surface water quality is very important for effective water resources management. In this study, seven water quality parameters were analyzed in four watersheds in the city of Fortaleza, the Brazilian capital with the highest population density: biochemical oxygen demand (BOD), chlorophyll-a (Chl-a), dissolved oxygen (DO), total colifo...

Calcium, sodium and potassium are essential for the contractile function of cardiomyocytes. In pulmonary arterial hypertension (PAH), intracellular calcium dynamics are impaired, affecting contractility and leading to heart failure. Energy-dispersive X-ray spectroscopy associated with scanning electron microscopy (EDS-SEM) technique can be useful for mapping the distribution of these minerals in cardiac tissue. This study aime...