Acute infectious exacerbations in chronic obstructive lung disease and effects of azithromycine, sultamycilline, ciprofloxacin and cefaclor monohydrate Kronik obstruktif akciger hastaligi olgularinda akut infeksiyon doneminde patojen ajanin saptanmasi ve azitromisin, sultamisilin, siprofloksasin ve sefaklor monohidratin etkinligi