Judul: Studi Kemampuan Vaksin ND-IB Lived: Pembentuk Kekebalan dan Perlindungan terhadap Paparan Virus Newcastle Disease pada Ayam Pedaging
Abstrak: The objective of this study was to measure the antibody titer of broilers were vaccinated with lived ND LaSota-IB H120 vaccine, and to observe the clinical signs and pathological lesions on challenged group. As much as 60 commercial Day Old Chicks were used in the experimental. Twenty chickens were bleed at day one to measure maternal antibody against Newcastle Disease (ND) using Hemaglutination Inhibition (HI) Test. The remaining fourty chickens were divided into four groups. Each group consisted of ten broilers. Group K1 and K2 were unvaccinated. Group K3 and K4 were vaccinated on the 2nd day according to the manufacture procedure. Challenge was carried out on 14th day (12th day post vaccination) to group K1 and K3 with ND Indonesia isolate virus. Blood samples from unvaccinated and vaccinated group were taken on 7th, 14th, and 22nd day. The result showed that chickens had high maternal antibody titer. The combination of intranasal and oral vaccination was able to produced protective antibody against ND viral infection. Vaccination was able to reduced lethargy and petechiae cecal tonsil. The clinical signs and pathological lesions were more severe on unvaccinated group.
Keyword: vaccine, Newcastle Disease, LaSota H-120, HI test, Broiler

Judul: Gambaran respon kebal terhadap Newcastle Disease pada ayam pedaging yang divaksin IBD-Killed
Abstrak: Penelitian ini bertujuan untuk mengetahui dan membandingkan gambaran respon kebal terhadap Newcastle Disease pada ayam broiler yang divaksin IBD killed dan IBD lived. Sebanyak 1000 ekor ayam pedaging strain Cobb dibagi dalam dua kelompok masing-masing 500 ekor. Kelompok P1 divaksinasi dengan vaksin ND lived dan IBD killed dosis tunggal, sedangkan kelompok P2 sebagai kontrol divaksinasi dengan vaksin ND lived dan ND killed. Dua minggu kemudian dilakukan vaksinasi pada kelompok P2 dengan vaksin AVI IBD inter (lived vaccine). Sampel darah diambil pada minggu ke-0, minggu ke-2, dan minggu ke-4. Pengamatan dengan uji haemaglutinasi inhibisi dilakukan terhadap seluruh sampel serum. Hasil pengamatan menunjukkan kelompok P1 mampu membentuk antibodi terhadap ND dengan titer yang protektif pada 2-4 minggu setelah vaksinasi. Kelompok P2 hanya mampu membentuk titer antibodi protektif terhadap ND pada minggu ke-2 setelah vaksinasi ND. Pada minggu ke-4 kelompok P2 mengalami penurunan antibodi terhadap ND. Hal ini mengindikasikan bahwa vaksinasi IBD lived pada minggu ke-2 menyebabkan imunosupresi pada ayam yang divaksin ND sehingga antibodi terhadap ND pada 2 minggu setelah vaksinasi IBD menurun menjadi tidak protektif lagi. Dari hasil penelitian ini dapat disimpulkan bahwa vaksinasi IBD killed dosis tunggal tidak menyebabkan imunosupresi sehingga tidak mengganggu pembentukan antibodi terhadap vaksinasi ND. Kata kunci : titer ND, virus IBD, Hemaglutinasi
Keyword: Titer ND, Virus IBD, Hemaglutinasi inhibisi

Judul: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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