[Rabbits and leaf-cutting ants: the Brazilian plan to use the myxoma virus (MYXV) against rabbit plagues in Australia, 1896-1952].

This article analyzes the singularity of historical, scientific, and political processes from the discovery of the disease caused by the myxoma virus (MYXV) that came to be known as infectious myxomatosis to the application of this virus against a plague of rabbits in Australia. This narrative focuses on research by Henrique de Beaurepaire Aragão, a researcher at the Oswaldo Cruz Institute, and later efforts by the scientist Jean Macnamara to promote studies and implement MYXV in Australia. The scientists' research notes were consulted, along with official documents recording the experiments and periodicals. In this process, the historical development of virology and biological controls as a field of study was also considered.