Abstract
A total of 43 wild birds (crows and hawfinches) in seven separate incidents were found dead during the spring from 2004 to 2006 in Iwate Prefecture. Pathological, toxicological and pathogenic examinations of the birds showed miosis and lacrimation. Observed pathological changes were characterized by severe congestion in the lungs, kidneys, liver and optical choroids, nephrotoxic acute tubular necrosis and hypersecretion of the mucous glandular epithelia of digestive tracts. The gizzard contents contained organophosphates from the birds in five incidents and chemicals suggestive of carbamates from those in two incidents. Neither hemagglutinative viruses nor significant bacteria were isolated from the affected birds. Based on the results, the disease was diagnosed as poisoning caused by the detected chemicals.
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