Chapter 3 Differential diagnosisF1 United Kingdom Repealed Original text. Later amendments are not shown. 1Preliminary differentiation 2Confirmatory identification 3Further typing and characterization of isolates Annotations Textual amendments F1 Repealed by Council Directive 2005/94/EC of 20 December 2005 on Community measures for the control of avian influenza and repealing Directive 92/40/EEC. Chapter 3