An Overview on Marek’s Disease Virus Evolution and Evidence for Increased Virulence in Brazil

Torres, Acd; Marin, S. Y.; Costa, Carlos Alberto da; Martins, N. R. S.

doi:10.1590/1806-9061-2018-0870

Cited by 3 publications

(1 citation statement)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, for backyard flocks, vaccination is limited or poorly implemented, and the health status is unknown, potentially justifying the higher occurrence. A recent study on Marek's disease, conducted in our geographical region, demonstrated the presence of virulent viral strains in backyard chickens (Torres et al 2019), as well as in another state (Chacón et al 2019). Thus, it is essential to instruct also the backyard chicken owners about the importance of vaccination (Cadmus et al 2019).…”

Section: Discussionmentioning

confidence: 67%

Hepatic changes in Gallus gallus domesticus in Brazil

et al. 2022

Self Cite

View full text Add to dashboard Cite

The occurrence and the frequency of hepatic changes in chickens, including broiler (BC), layer (LC) and backyard chickens (BYC) were investigated. The retrospective and prospective study (2006-2021) was conducted with a total of 300 cases of liver disorders. Industrial poultry (BC and LC) were frequently affected (88%) and noninfectious changes were the most diagnosed (69%). Considering etiology or conditions, the hepatic changes were classified as follows: degenerative changes (42%), bacterial (28%), metabolic (15%), toxic (8%), viral (3%), neoplastic (2%), protozoal diseases (1.5%) and circulatory disorders (0.5%). Regarding the type of bird, degenerative, toxic changes and viral hepatitis were more frequent in BC. Circulatory and metabolic disorders, as well as bacterial hepatitis, were more frequently diagnosed in LC. Neoplastic and protozoal hepatitis occurred more frequently in BYC. The macroscopic examination in association with histopathology enabled the diagnosis of the hepatic changes in 59% of the cases. Considering bacterial hepatitis in commercial poultry, the etiological diagnosis is highly important, in view of the risk for public health, despite the obvious importance due to the productivity losses and condemnation at processing.

show abstract

Section: Discussionmentioning

confidence: 67%