Isolation of Highly Pathogenic Avian Influenza H5N1 Virus from Saker Falcons (Falco cherrug) in the Middle East

Table 1

Antigenic analysis of Fa/SA/05 and Fa/KW/07 hemagglutinin using ferret polyclonal antisera. <: HI antibody titer less than 40. The HI titer for the homologous virus and antiserum is indicated by bold/underline. Viruses: HK213 (A/Hong Kong/213/03), VN1203 (A/Vietnam/1203/04), CkPak (A/Chicken/Pakistan(Lahore)/NARC/3320/4/06), FaSA (A/Falcon/Saudi Arabia/D1795/05), FaKW (A/Falcon/Kuwait/D286/06), JweHK (A/Japanese White Eye/Hong Kong/1038/06), and dkLao25 (A/Duck/Laos/25/06).

		HI titer against ferret antiserum to
Clade	Virus	rgHK213	rgVN1203	CkPak	FaSA	FaKW	JweHK	dkLao25
1	rgHK213	𝟑𝟐𝟎	320	1280	640	160	640	80
1	rgVN1203	<	𝟏𝟔𝟎	40	80	<	<	<
2.2	CkPak	<	<	𝟑𝟐𝟎	160	640	<	<
2.2	FaSA	<	<	160	𝟏𝟔𝟎	160	<	<
2.2	FaKW	<	<	320	40	𝟑𝟐𝟎	40	<
2.3	JweHK	160	80	80	40	40	𝟑𝟐𝟎	640
2.3	dkLao25	<	<	<	40	<	<	𝟏𝟔𝟎