| Abstract
| - We present a study of ISOGAL sources in the “intermediate” galactic bulge ( $|l|< 2^\circ$, $|b|\sim 1^\circ$-4°), observed by ISOCAM at 7 and 15 μm. In combination with near-infrared ( I, J, Ks) data of DENIS survey, complemented by 2MASS data, we discuss the nature of the ISOGAL sources, their luminosities, the interstellar extinction and the mass-loss rates. A large fraction of the 1464 detected sources at 15 μm are AGB stars above the RGB tip, a number of them show an excess in ([7]-[15]) 0 and ( Ks-[15]) 0 colours, characteristic of mass-loss. The latter, especially ( Ks-[15]) 0, provide estimates of the mass-loss rates and show their distribution in the range 10 -8 to 10 $^{-5}~M_{odot}$ yr -1.
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