Judul: Seroprevalensi dan Faktor Risiko Penularan Mycoplasma gallisepticum pada Peternakan Ayam Petelur Komersial di Kabupaten Blitar
Abstrak: Mycoplasma gallisepticum (MG) may cause chronic respiratory disease (CRD) in chickens, an endemic disease in poultry flock and economically significant disease of poultry industry not only in Indonesia but also in many countries around the world. CRD are included in the category of notifiable disease, which means in CRD case occur in the field should be immediately reported to government to be handled. Only few farmers are aware that CRD caused economic losses from upstream to downstream. Economic losses is not caused by high mortality, but is caused by reduced egg production, reduced fertility and hatchability in the range of 8% to 30%, increased embrio mortality up to 20%, increased chicks mortality up to 10%, inhibited weight gain, and increased feed convertion. This study aims to (1) determine a seroprevalence of MG in commercial layer farm in Blitar Regency; (2) create an overview map of the distribution of CRD cases in commercial layer farm; (3) identify any risk factors involved in the CRD infection in some commercial layer farms in Blitar Regency. The study was using cross-sectional field study design, in which data was only taken at one time. The data of blood serum sample of commercial layer and the data of questionnaire from farmers and poultry experts was collected. Blood serum sample from commercial layer chickens tested in laboratory using rapid serum agglutination (RSA) test. Data of laboratory results was processed to determine the crude seroprevalence rate and standardized risk ratio value. Data from the questionnaires distributed to farmers were processed using Cramer’s V correlation test and logistic regression in SPSS version 17, while the data from poultry expert questionnaires were processed using Analytical Hierarchy Process (AHP) in Expert Choice computer program. The results showed that 26 samples of 264 samples tested were found positive for MG, while 238 were found negative, indicating a share of 9.85% among of respiratory disease. Positive sample for MG was found in 10 sub-districts and negative sample was found in 12 sub-districts. Bakung sub-district has the highest risk of MG infection (SRR = 5.0), followed by Udan Awu sub-district (SRR = 4.0). Gandusari and Sutojayan sub-districts have the same SRR value (SRR = 3.0), the other five sub-districts (Srengat, Wlingi, Selopuro, Wonotirto, and Wates sub-districts) only has SRR value 2,0. Binangun sub-district has SSR value 1,0 while the other sub-district has the lowest risk of MG infection (SRR = 0.0) Based on Cramer’s V correlation test showed that the very significant variables (p < 0.01) of laboratory test results were the feed storage procedure (r = 0.252; p = 0.000), flocking density (r = 0.232; p = 0.001), vitamin intake (r = 0.194; p = 0.007), feeding techniques (r = 0.197; p = 0.001) and intensity of house disinfection (r = 0.198; p = 0.006). The logistic regression analysis results showed that the very significant risk factors of MG infection in commercial layer farm were the flocking density of 1501 to 3000 birds (p = 0.004; OR = 3.4) and higher vii (p = 0.001; OR = 6.1), bird feeding once a day (p =
Keyword: risk factors, commercial layer chicken, Blitar Regency., Mycoplasma gallisepticum, seroprevalence

Judul: Manajemen Risiko Penyakit Unggas pada Peternak dan Pedagang Ayam Broiler di Jawa Barat
Abstrak: Usaha sektor peternakan mempunyai potensi sangat besar dan berpengaruh pada kemajuan perekonomian di Indonesia. Ayam broiler merupakan salah satu komoditas dari sektor petenakan yang menjadi sentra usaha di Indonesia berada di Jawa Barat. Peran peternak dan pedagang menjadi bagian penting dalam memitigasi penyebaran penyakit untuk meminimlasir tingkat kematian ayam broiler. Tujuan dari penelitian ini adalah untuk mengidentifikasi karakterisitik rantai pasok peternak dan pedagang dan menganalisis perilaku peternak dan pedagang dalam pengendalian penyakit unggas sehingga diketahui pengaruh rantai pasok pada tingkat kematian ayam broiler. Penelitian ini dilakukan dengan cara melakukan survei dan wawancara dengan menggunakan istrumen kuesioner di Kabupaten Ciamis, Kabupaten Tasikmalaya, Kabupaten Subang, dan Kabupaten Sukabumi. Pemilihan lokasi penelitian dilakukan secara bertahap (multistage sampling) dimana pemilihan kabupaten dan lokasi kecamatan dilakukan secara sengaja (purposive). Dan penetuan responden yang digunakan secara radom sampling. Metode pengolahan data menggunakan analisis deskriptif, Value Chain Mapping, analisis persepsi dan perilaku peternak dan pedagang, dan analisis regresi linier berganda. Penelitian ini menghasilkan bahwa karakteristik peternak di Kabupaten Ciamis, Tasikmalaya, Sukabumi dan Subang dapat dilihat berdasarkan jenis kegiatan usahanya yang terdiri dari peternakan maklun, mandiri, kemitraan/kontrak harga, dan perusahaan. Untuk pedagang terdapat dua jenis pedagang, yaitu pedagang pengumpul dan broker. Berdasarkan analisis jaringan distribusi terdapat perbedaan diantaranya banyak pelaku rantai pasok, pola kegiatan usaha, aktor yang terlibat. Dalam pengendalian penyakit, perilaku peternak melakukan tindakan yang terdiri dari memisahkan ayam, mengobati ayam, menjual semua ayam dan memusnahkan ayam yang sakit. Peternak dari keempat kabupaten melakukan tindakan yang berbeda-beda. Dari hasil, sebagian besar peternak melakukan tindakan dengan memisahkan ayam yang terinfeksi dengan ayam yang sehat untuk mencegah penyebaran penyakit ke semua ayam. Sedangkan perilaku pedagang dalam pengendalian penyakit adalah sebagian besar pedagang akan memusnahkan ayam yang terjangkit dengan risiko kerugian ditanggung sendiri. Pengetahuan pedagang terhadap gejala flu burung menjadi dasar mitigasi penyakit. Dari kriteria gejala flu burung yang ada, peningkatan kematian secara mendadak menjadi gejala yang paling sering diketahui. Hasil uji regresi diperoleh tiga faktor signifikan yang mempengaruhi tingkat kematian ayam broiler, diantaranya jarak, jumlah pembelian ayam per bulan, dan pengetahuan pedagang pada gejala flu burung.
Keyword: Analasis Regresi Linier Berganda, Manajemen Risiko, Penyakit Unggas, Perilaku pedagang dan peternak

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