  An analysis of low resolution spectra and infared data of 29 ISOGAL-DENIS
sources with mid-IR excess is presented. Eight ISOGAL sources from our sample
with 7-15 micron excess are found to be B and A-type stars, some of them with
emission lines. Two ISOGAL sources, J175614.4-240831 (B3-4IIIe) and
J173845.3-312403 (B7III), show a bump between 5000 and 6000 Angstroem which
maybe attributed to extended red emission (ERE). Some of the B,A and F-type
giants with a large infrared excess might be in the post-AGB phase. For about
50% of the sources in this preliminary study, a nearby second (or even
multiple) component was found. Such sources, in particular two B-stars, are not
discussed when the probability of the optical spectrum being associated with
the ISOGAL source is low. These results confirm that the DENIS-ISOGAL
I-J/K-[15] diagram is the most suitable diagram to distinguish between early
(AB) and late spectral types (KM). It provides the most useful tool to
systematically search for nearby early-type stars with an infrared excess among
the background of distant AGB stars in ISOGAL fields of the Galactic disk.
