Judul: Studi kemampuan vaksin aktif ND-IB: pembentuk kekebalan dan perlindungan terhadap paparan virus ib pada ayam pedaging
Abstrak: Objective of the study is to measure the antibody titer, clinical sign, and post mortal lesion of broilers vaccinated with Newcastle Disease-Infectious Bronchitis (ND-IB) live vaccine (LaSota H-120) and challenge with Infectious Bronchitis virus (IBV) field isolates. As much as 100 DOCs were use in this study. The maternal antibody derivates were taken from 20 broilers on the 1st day of experiment. The rest of the broilers divided into 4 groups (K1, K2, K3, and K4). Each group consisted 20 broilers. Group K1 and K2 were unvaccinated. Group K3 and K4 were vaccinated on the 2nd day according to the manufacturer procedure. Blood samples from unvaccinated and vaccinated group were taken on 7th, 14th, and 22nd day. Antibody titer was measured by using enzyme linked immunosorbent assay (ELISA). Challenge was carried out on 14th day (12th day post vaccination) to group K2 and K4. The result showed that chickens have high maternal antibody titer. The combination of intranasal and oral vaccination was not able to produced protective antibody against IB. Vaccination was able to reduced lethargy sign and cloudy airsacs. The clinical signs and post mortal lesions were more severe on K2 group than K4 group.
Keyword: broiler, ELISA, Infectious Bronchitis, LaSota H-120, vaccine

Judul: Pengaruh Vaksin Aktif Newcastele Disease-Infectious Bronchitis Terhadap Performance Ayam Pedaging
Abstrak: This research aimed to investigate the performance of broiler chicken vaccinated with the vaccine ND-IB (LaSota H-120). As much as 80 broiler chickens were used in this investigation and were divided into two groups e.i vaccinated and unvaccinated group. Each group consisted of 40 chickens. On day two, the vaccinated group were administrade the ND-IB vaccine (LaSote H-120). On the 14th day, each group were divided into three subgroups. The vaccinated chickens were devided in to 3 groups e.i K1, K2 and K3, whereas the unvaccinated group became group K4, K5 and K6. Groups K1 and K4 were unchallenged groups, whereas group K2 and K5 were challenged with ND virus and group K3 and K6 were challenged with IB virus. Every day, food consumption was measured and the body weight were measured every week. The result of this investigation indicated that the vaccinnation had no effect on weight gain and the vaccination wasn’t optimum in protecting the chickens against ND virus. The food convertion ratio of the vaccinated group of broilers were higher compared to the unvaccinated ones. The IP of vaccinated chickens were unsignificant different with unvaccinated groups.
Keyword: vaccine, LaSota H-120, performance, FCR, broiler chickens

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology