Revisão sistemática de Leucose enzoótica bovina

Abstract

Enzootic bovine leukosis (LEB), also known as bovine lymphoma or bovine leukemia, is an infectious disease of viral origin, and is currently widespread in cattle herds around the world, and also has a major economic impact, especially in dairy herds. However, due to the complexity of the interaction between the virus and the host, detailed experimental research can take a certain amount of time for studies in the field and in the laboratory with rigorous protocols, which implies costs, technologies and resources. Given this, even though observational studies do not occupy the highest position in the hierarchy of scientific evidence, it is important to recognize their credit, as they allow data to be collected from populations in a random manner, providing representativeness to the sample in a short period of time. and at relatively low costs. Therefore, the present study aimed to carry out a systematic review based on PRISMA 2020, summarizing relevant information regarding enzootic bovine leukosis in national and international dairy herds. The present study systematically selected and analyzed the risk of bias twenty articles with publication date from 2009 onwards. Furthermore, it had a significant sample number, totaling 11,284 samples, and presents data such as prevalence, diagnosis of leukemia cattle in dairy herds geographically distributed across eight countries.