Danofloxacin was administered to 15 laying hens via drinking water for 12 days. Egg white and yolk from each egg were separated and danofloxacin residues were analysed by a high performance liquid chromatography method with fluorescence detection. Danofloxacin was detectable on the first day in egg white and on the second day in egg yolk after the beginning of administration, and higher danofloxacin residues accumulated in egg yolk than in egg white. Danofloxacin in egg white decreased fairly rapidly and was detectable up to 4 days after withdrawal of the drug. In egg yolk the residues declined slowly and were detectable up to 11 days after withdrawal of the drug.
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