  Fractional exclusion statistics (FES) is a generalization of the Bose and
Fermi statistics. Typically, systems of interacting particles are described as
ideal FES systems and the properties of the FES systems are calculated from the
properties of the interacting systems. In this paper I reverse the process and
I show that a FES system may be described in general as a gas of quasiparticles
which obey Bose or Fermi distributions; the energies of the newly defined
quasiparticles are calculated starting from the FES equations for the
equilibrium particle distribution. In the end I use a system in the effective
mass approximation as an example to show how the procedure works.
