| an outbreak of copper poisoning in mute swans (cygnus olor). | eight of 9 mute swans (cygnus olor) untied in the river acrossing the central part of tottori-city died within the period of 40 days of summer in 1989. seven of 8 mute swans were pathologically examined. in all swans many yellowish-brown to greenish-brown granules were found in the cytoplasm of hepatocytes. the granules were intensely stained with rhodanine copper stain, schmorl method, and berlin blue stain. ultrastructurally, many lysosomes increased in size and density in the cytoplasm of hep ... | 1992 | 1606252 |