Bacterial and parasite co-infection in Mexican golden trout (Oncorhynchus chrysogaster) by Aeromonas bestiarum, Aeromonas sobria, Plesiomonas shigelloides and Ichthyobodo necator.

Background: Bacterial infections are responsible of high economic losses in aquaculture. Mexican golden trout (Oncorhynchus chrysogaster) is a threatened native trout species that has been introduced in aquaculture both for species conservation and breeding for production and for which no studies of bacterial infections have been reported.

Case Presentation: Fish from juvenile stages of Mexican golden trout showed an infectious outbreak in a farm in co-culture with rainbow trout (Oncorhynchus mykiss), showing external puntiform red lesions around the mouth and caudal pedunculus resembling furuncles by Aeromonas spp.

Ceria-Doped Titania Nanoparticles as Drug Delivery System.

The development of new devices at the nanoscale level, as therapeutic support in medical practice, has facilitated the development of drug delivery systems (DDSs) based on nanoparticles. This enables the transport of an effective dose of therapeutic agents to target cells or tissues, with no collateral damage to healthy cells. Owing to their unique properties, nanoparticles doped with rare earths have demonstrated the potential of being used as a DDS of drug molecules to target cells or tissues.

The CSL proteins, versatile transcription factors and context dependent corepressors of the notch signaling pathway.

The Notch signaling pathway is a reiteratively used cell to cell communication pathway that triggers pleiotropic effects. The correct regulation of the pathway permits the efficient regulation of genes involved in cell fate decision throughout development. This activity relies notably on the CSL proteins, (an acronym for BF-1/RBPJ-κ in / respectively, uppressor of Hairless in , ag-1 in ) which is the unique transcription factor and DNA binding protein involved in this pathway.

Performance of culture media for the isolation and identification of Staphylococcus aureus from bovine mastitis.

Rapid isolation and identification of pathogens is a major goal of diagnostic microbiology. In order to isolate and identify Staphylococcus aureus, a number of authors have used a variety of selective and/or differential culture media. However, to date, there are no reports comparing the efficacy of selective and differential culture media for S.

Evaluation of DNA extraction methods of rumen microbial populations.

The dynamism of microbial populations in the rumen has been studied with molecular methods that analyze single nucleotide polymorphisms of ribosomal RNA gene fragments (rDNA). Therefore DNA of good quality is needed for this kind of analysis. In this work we report the evaluation of four DNA extraction protocols (mechanical lysis or chemical lysis with CTAB, ethylxanthogenate or DNAzol(®)) from ruminal fluid.