  We present results and source counts at 90micron extracted from the
Preliminary Analysis of the European Large Area ISO Survey (ELAIS). The survey
covered about 11.6 square degrees of the sky in four main areas and was carried
out with the PHOT instrument onboard the Infrared Space Observatory (ISO). The
survey is at least an order of magnitude deeper than the IRAS 100micron survey
and is expected to provide constraints on the formation and evolution of
galaxies. The majority of the detected sources are associated with galaxies on
optical images. In some cases the optical associations are interacting pairs or
small groups of galaxies suggesting the sample may include a significant
fraction of luminous infrared galaxies. The source counts extracted from a
reliable subset of the detected sources are in agreement with strongly evolving
models of the starburst galaxy population.
