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Antigenic reactivity pattern of a selection of the virus isolates. Result of HI test of 24 selected isolates against chicken antisera (Konawe/204O/07, PWT-WIJ/06, Wates1/05, and Vietnam/08/04). HI titers are expressed as the reciprocal value of log2. Abbreviation: chicken (Ck), duck (Dk), Bantul (BT), Kulon Progo (KP), Sleman (SM), Magelang (MG). a The letters 'BBVW' have been removed from the virus names.
