  We use host galaxy imaging studies of the PG Quasar survey to compare the
far-infrared (FIR) properties of quasars with disturbed and undisturbed host
galaxies. By using survival analysis, we show that the quasars with disturbed
host galaxies, with morphologies classified from a homogenous data set, have a
60 micron luminosity distribution that is different from that of those with
undisturbed hosts with >97% confidence. For morphological classifications using
an inhomogenous data set, including HST data for some objects, this confidence
rises to >99% confidence. The mean 60 micron luminosity of the disturbed-host
quasars is several times greater than that of the undisturbed-host quasars.
However, possible biases in the PG survey might affect these conclusions. Our
results are interpreted as supporting the idea that quasars are related to at
least some Ultraluminous Infrared Galaxies. We discuss the implications of this
result for studies of quasar and galaxy evolution.
