Molecular characterization of the oncogene of Marek's disease virus in vaccinated Brazilian poultry farms reveals selective pressure on prevalent strains.

Marek's disease virus (MDV) has become an increasingly virulent pathogen in the poultry industry despite vaccination efforts to control it. Brazil has experienced a significant rise of Marek's disease (MD) outbreaks in recent years. Our study aimed to analyze the complete gene sequences to understand the molecular epidemiological basis of MD outbreaks in Brazilian vaccinated layer farms.

Evolutionary Analysis of a Parrot Bornavirus 2 Detected in a Sulphur-Crested Cockatoo () Suggests a South American Ancestor.

Parrot bornavirus (PaBV) is an RNA virus that causes Proventricular Dilatation Disease (PDD), neurological disorders, and death in . Its diversity in South America is poorly known. We examined a presenting neuropathies, PDD, and oculopathies as the main signs.