Publications by authors named "R M Quadros"
Wolbachia is an intracellular endosymbiont bacterium found in nematodes and arthopods. Regarding mites, the Wolbachia supergroup U has been described based on strains found in the genus Spinturnix. In this study, ten specimens of Periglischrus iheringi (Mesostigmata: Spinturnicidae), collected from Artibeus obscurus (Chiroptera: Phyllostomidae) in Santa Catarina State, were found to be infected with Wolbachia.
View Article and Find Full Text PDFCase report: granulomatous hepatitis due to Mycobacterium avium in an Atlantic yellow-nosed albatross (Thalassarche chlororhynchos) from Southern Brazilian coast.
Vet Res Commun
December 2024
Article Synopsis
- - The study details a case of granulomatous hepatitis in an Atlantic yellow-nosed albatross found dead in Brazil, caused by the bacteria Mycobacterium avium.
- - Necropsy revealed significant liver enlargement and granulomas with caseous necrosis, confirmed through bacterial culture and PCR analysis.
- - The findings highlight the need for wildlife surveillance in coastal areas, as pelagic birds can carry pathogens posing risks to other wildlife and domestic animals.
Oxygen (O) supplementation is commonly used to treat hypoxia in patients with respiratory failure. However, indiscriminate use can lead to hyperoxia, a condition detrimental to living tissues, particularly the brain. The brain is sensitive to reactive oxygen species (ROS) and inflammation caused by high concentrations of O, which can result in brain damage and mitochondrial dysfunction, common features of neurodegenerative disorders.
View Article and Find Full Text PDFBackground: Oxygen therapy is an alternative for many patients with hypoxemia. However, this practice can be dangerous as oxygen is closely associated with the development of oxidative stress.
Methods: Male Wistar rats were exposed to hyperoxia with a 40% fraction of inspired oxygen (FIO) and hyperoxia (FIO = 60%) for 120 min.