Abstract
The concentration of IgY in the body is often associated with resistance to bacterial infections, whereas ND specific antibody titters are indicated as resistance to viral infections. The aim of this study was to determine the characteristics of IgY and ND titters in newly released chickens, and to compare them with native chickens spread in the community. This research used 286 IPB-D1 chickens, Jatiwangi Sentul chickens, and Sensi-1 chicken. IgY concentration were analyzed using the ELISA method, and ND titters were analyzed using the HI test. The results of the study showed high IgY concentrations were found in IPB-D1 chickens (10.10) and Sensi-1 chickens (10.63), while moderate IgY concentrations were found in jatiwangi sentul chickens (8.63). The results of ND titters showed that the chicken IPB-D1 (2.08) and Sensi-1 chicken (2.54) were higher than Sentul Jatiwangi chickens (0.70). It could be concluded that IPB-D1 chickens and Sensi-1 chickens are more resistant to disease infections than other chickens. The disease resistance selection program in Sentul Sensi-1 chickens, and the utilization of the heterosis effect through the crossing program in chickens IPB-D1 has been shown to increase good disease resistance indicators. Selection and crossbreeding programs in IPB-D1 and Sensi-1 chicken have been proven to increase resistance characteristics.
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