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We present new results from optical spectroscopy of the brightest Hii regionin the dwarf irregular galaxy UKS 1927-177 in Sagittarius (SagDIG). From highsignal-to-noise spectra, reddening-corrected line flux ratios have beenmeasured with typical uncertainties of a few percent, from which the oxygenabundance is rediscussed, and new abundance estimates are derived for N and Ne.The O abundance in SagDIG, estimated with the empirical abundance indicator R23and other methods, is in the range 12+log(O/H)=7.26 to 7.50. The fact thatSagDIG is ~10 times closer than IZw18 makes it an ideal target to test thehypothesis of the existence of young galaxies in the present-day universe.Indeed, stellar photometry suggests that this galaxy may harbor a stellarpopulation older than a few Gyr, and possibly an old stellar component as well.The case of SagDIG therefore supports the view that very low chemicalabundances can be maintained throughout the life of a dwarf stellar system,even in the presence of multiple star formation episodes.Comment: 6 pages, 3 figures, accepted for publication in A&A, main journa

New abundance measurements in UKS 1927–177, a very metal-poor galaxy in the Local Group