  Effects of the quark field on the ghost propagator of the lattice Landau
gauge are investigated by using the quenched gauge configuration of SU(2) first
copy and the parallel tempering (PT) gauge fixed samples, quenched SU(3) $56^4$
configuration and unquenched SU(3) configurations produced by the MILC
collaboration.
  We measure color symmetric and color antisymmetric ghost propagator and the
Binder cumulant of $l^1$ norm and $l^2$ norm of color antisymmetric ghost
propagator and investigate deviation from that of Gaussian distribution.
  The dynamical quarks make color antisymmetric ghost propagator closer to
Gaussian distribution and Kugo-Ojima color confinement parameter $c$ closer to
1.
