Indriani, Risa text 2006 Indriani, Risa Media Kedokteran Hewan .-- Vol.22(2) p.84-88.-- ABSTRAK : The outbreaks of highly pathogenic avian influenza (HPAI) H5N1 virus among poultry in Indonesia have occurred since 2003. Indonesian government has established 9 (nine) strategies including vaccination for controlling the disease. Indonesian veterinary laboratory routinely conduct serological of blood to detect antibody post vaccination, but not from egg yolk. The egg yolk is rich of antibody content, because chicken transmitted the antibody for rheir progeny through the eggs. The purpose of this study to detect of antibody in egg yolk from vaccinated chickens, unvaccinated chicken and eggs from retail market by using haemagglutination inhibition (HI) test and agar gel immunodiffusion test (AGID). The result of this study showed that antibody oa AI can be detected in egg yolk from vaccinated chicken and can be used as alternative to detect antibody in vaccination chickens. /L73/494 240219 20240219092306 INLIS000000000002286 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)