Judul: Antibiotic Resistance in Klebsiella spp. Isolated from Dog in Vetopet Clinic and House of Blessing Dog Shelter
Abstrak: Klebsiella spp. merupakan bakteri Gram negatif dan bersifat patogen potensial pada anjing. Penggunaan antibiotik yang tidak bijak dalam mengobati infeksi bakteri dapat menyebabkan masalah resistansi. Penelitian ini bertujuan mengidentifikasi gambaran resistansi Klebsiella spp. yang diisolasi dari anjing di Klinik Vetopet dan House of Blessing Dog Shelter terhadap beberapa jenis antibiotik. Metode penelitian ini terdiri dari koleksi sampel, isolasi, identifikasi, dan uji resistansi antibiotik menggunakan metode disk diffusion Kirby-Bauer berdasarkan Clinical and Laboratory Standar Institute 2021. Antibiotik yang diuji terdiri dari amoksisilin-asam klavulanat, ampisilin, doksisiklin, enrofloksasin, eritromisin, gentamisin dan metronidazol. Isolat Klebsiella spp. telah resistan terhadap metronidazol dan eritromisin. Doksisiklin, enrofloksasin, dan gentamisin masih sensitif terhadap Klebsiella spp.. Hasil penelitian ini diharapkan dapat menjadi acuan bagi dokter hewan dalam memilih jenis antibiotik untuk mengobati infeksi Klebsiella spp., Klebsiella spp. is a Gram negative bacteria and a potential pathogen in dogs. Unwise use antibiotic in treating bacterial infections can lead resistance problems. This study aims to identify illustrate the resistance of Klebsiella spp. isolated from dogs at the Vetopet Clinic and the House of Blessing Dog Shelter against several types of antibiotics. This research method consists of sample collection, isolation, identification, and antibiotic resistance test was conducted by Kirby-Bauer disk diffusion method based on Clinical and Laboratory Standar Institute 2021. The antibiotics tested consisted of amoxicillin-clavulanic acid, ampicillin, doxycycline, enrofloxacin, erythromycin, gentamicin, and metronidazole. Isolates of Klebsiella spp. have been resistant to metronidazole and erythromycin. Doxycycline, enrofloxacin, and gentamicin are still sensitive to Klebsiella spp.. The results of this study are expected to be a reference for veterinarians in choosing the type of antibiotic to treat Klebsiella spp. infection.
Keyword: antibiotic, dogs, Klebsiella spp, resistance

Judul: Resistance of Klebsiella pneumoniae from Hospitalized Cats at the Animal Clinic of Depok City to Antibiotics
Abstrak: Resistansi bakteri Klebsiella pneumoniae terhadap antibiotik telah menjadi masalah kesehatan global, mengakibatkan penurunan efektivitas terhadap banyak antibiotik. Penelitian ini bertujuan mendapatkan gambaran resistansi K. pneumoniae yang diisolasi dari kucing rawat inap di klinik Kota Depok terhadap beberapa antibiotik. Metode penelitian ini terdiri dari kuesioner, koleksi sampel, isolasi, identifikasi, dan uji kepekaan terhadap antibiotik. Sebanyak tujuh isolat K. pneumoniae berhasil diidentifikasi, resistansi terjadi pada sefotaksim sebanyak tujuh isolat, amoksisilin tiga isolat, gentamisin satu isolat, dan enrofloksasin satu isolat. Hasil intermediet ditunjukan oleh amoksisilin, enrofloksasin, dan doksisiklin dengan jumlah yang sama yakni satu isolat serta hasil sensitif ditunjukan oleh gentamisin sebanyak enam isolat, doksisiklin enam isolat, enrofloksasin lima isolat dan amoksisilin tiga isolat. Informasi ini diharapkan dapat membantu dokter hewan dalam memilih antibiotik yang tepat untuk pengobatan penyakit yang disebabkan oleh bakteri ini., The resistance of bacteria Klebsiella pneumoniae to antibiotics has become a global health problem, resulting in a reduction in the efficacy of many antibiotics. This study aims to illustrate the resistance of K. pneumoniae isolated from hospitalized cats on veterinary clinics in Depok City to several antibiotics. The research method consisted of questionnaires, sample collection, isolation, identification, and antibiotic sensitivity test. A total of seven K. pneumoniae isolates were identified. Resistance occurred in seven isolates of cefotaxime, three isolates of amoxicillin, one isolate of gentamicin and enrofloxacin. The intermediate results were shown by amoxicillin, enrofloxacin, and doxycycline with the same amount, one isolate. The sensitive results were shown by six gentamicin isolates, six doxycycline isolates, five enrofloxacin isolates, and three amoxicillin isolates. Hopefully, this information can help veterinarians choose the appropriate antibiotic to treat diseases caused by these bacteria.
Keyword: animal clinic, antibiotic, antibiotic resistance, Klebsiella pneumoniae

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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