Judul: Status Resistensi Bakteri Salmonella sp. asal Peternakan Ayam Broiler di Kabupaten Cianjur dan Sukabumi terhadap beberapa Antibiotika
Abstrak: Resistensi bakteri terhadap antibiotika merupakan ancaman bagi kesehatan baik hewan maupun manusia. Tujuan penelitian ini adalah untuk mengisolasi dan mengidentifikasi bakteri Salmonella sp. asal ayam broiler di Kabupaten Cianjur dan Sukabumi dan melakukan uji resistensi terhadap tujuh antibiotika yaitu doksisiklin, ampisilin, tetrasiklin, siprofloksasin, asam nalidiksat, oksitetrasiklin dan eritromisin. Pengujian keberadaan bakteri dilakukan dengan menggunakan metode konvensional yaitu melakukan isolasi dan identifikasi bakteri Salmonella sp. dengan menginokulasikan sampel pada media selektif pre-enrichment, enrichment, Salmonella-Shigella Agar (SSA) dan uji biokimia. Isolat bakteri Salmonella sp. yang telah ditemukan kemudian dilakukan uji resistensi terhadap beberapa antibiotik dengan menggunakan metode Kirby Bauer. Hasil penelitian menunjukkan bahwa isolat Salmonella sp. resisten terhadap lima jenis antibiotika, yaitu tetrasiklin 100%, doksisiklin 100%, oksitetrasiklin 100%, eritromisin 100%, dan asam nalidiksat 100%. Sebesar 63.6% isolat Salmonella sp. bersifat intermediet terhadap siprofloksasin dan sebesar 81.8% menunjukkan hasil sensitif terhadap ampisilin-sulbaktam.
Keyword: antibiotika, identifikasi, isolasi, resistensi, Salmonella sp

Judul: Isolasi dan Identifikasi Salmonella sp. Resisten Antibiotik dari Ayam Broiler dan Ayam Layer di Kabupaten Cianjur
Abstrak: Salah satu penyebab utama food borne bacterial disease pada manusia adalah Salmonella yang sering terkait dengan makanan produk asal unggas. Penggunaan antibiotik yang berlebihan dan terus menerus sebagai pengendalian penyakit dan pemacu tumbuh pada ayam dapat menyebabkan bakteri menjadi resisten terhadap antibiotik. Penelitian ini bertujuan untuk mengetahui tingkat resistensi bakteri Salmonella sp. yang berasal dari ayam broiler dan ayam layer di Kabupaten Cianjur terhadap beberapa antibiotik. Pengujian resistensi Salmonella sp. terhadap antibiotik dilakukan dengan metode Kirby Bauer yang didasarkan pada hubungan ukuran zona hambat dengan sensitivitas bakteri. Hasil yang diperoleh kemudian dibandingkan dengan Clinical Laboratory Standards Institute (CLSI). Hasil uji sensitivitas Salmonella sp. menunjukkan bahwa semua isolat Salmonella sp. dalam penelitian ini telah mengalami multidrug resistance terhadap beberapa jenis antibiotik. Isolat yang berasal dari ayam broiler 100% resisten terhadap oksitetrasiklin, eritromisin, asam nalidiksat, dan enrofloksasin. Isolat yang berasal dari ayam layer 100% resisten terhadap oksitetrasiklin dan eritromisin.
Keyword: antibiotik, ayam broiler, ayam layer, resisten, Salmonella sp

Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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