Aim: The study aimed to detect the invA gene in Salmonella isolated from milkfish in the Sidoarjo wet fish market. Materials and Methods: A total of 84 samples were prepared in enrichment media and isolated on the surface of Salmonella Shigella Agar. Salmonella growth produces transparent colonies with blackish color in the middle due to H2S gas formation. Samples were identified as Salmonella based on macroscopic colony morphology. Presumptive Salmonella sp. was put on Bismuth Sulfite Agar media. Salmonella was determined based on the results of the biochemical test that has been carried out using Microbact identification kits from negative gram staining. Results: The results of this study indicate that 32 of 84 samples (38.09%) were Salmonella bacteria. Furthermore, the invA gene detection was carried out using the polymerase chain reaction technique. Electrophoresis results showed four positive samples contained invA gene with a length of 284 bp. Conclusion: Results in this study indicate that contamination of milkfish with Salmonella needs strict hygienic measures to prevent their transmission to human.

Aim: The research was to investigate the antibiotic resistance profile and to screen for methicillin-resistant Staphylococcus aureus (MRSA) from nasal mucosa swab of dogs. Materials and Methods: The samples were collected from three pet clinics, three K9 units, one veterinary teaching hospital, and one kennel in Surabaya. Of the 50 total samples, 24 confirmed S. aureus strains, which were used for antibiotic sensitivity tests using a disk diffusion method and screening of MRSA used oxacillin resistance screening for base (ORSAB). Results: This study showed that there were differences in antibiotic resistance patterns among different locations. Fourteen isolates were screened for MRSA by culture on ORSAB. Conclusion: MRSA carriage was found on nasal swab of dogs, and dogs can act as reservoir of MRSA for spreading to human health. Keywords: antibiotic-resistant, dogs, methicillin-resistant Staphylococcus aureus, Staphylococcus aureus.

The aimed of this study was to identify antibiotic Resistance of  Escherichia coli isolated from Shrimp. There were 20 samples taken and isolated on surface of Eosin Methilen Blue Agar. E.coli produced metalic green colonies. Samples identified as E.coli based on macroscopic features and morphology of colonies, microscopic examination with gram staining and biochemical tests. The antibiotic sensitivity was determined through a standard antimicrobial disk diffusion test. The results of this study showed that 9 samples were bacteria of the spesies  E. coli. Based on the results of antibiotic sensitivity test, it was found that 100 % of E. coli isolates were resistant to Amoxycillin 20 µg and 22,2 % of isolates are resistant to ampicillin 10 µg. Antibiotics Tetracycline 30 µg and Chloramphenicol 30 µg were 100 % sensitive. Gentamicin 10 µg showed that 77,8 % sensitive and 22,2 % intermediet. The precence of antibiotic resistance of betalaktam antibiotics makes it especially important to monitor antimicrobial susceptibility and mechanisms of resistance of E.coli isolated from shrimp, because new mechanisms of resistance occurring in animals may enter the food chain and its be  transferred to the human. This importance of  cooperation between sectors in order to monitor antimicrobial resistance.

This study attempts to investigate the antibacterial effectiveness of three varieties of garlic (single garlic, kating garlic, and black garlic) on the growth of Enterobacteriaceae bacteria (Escherichia coli, Enterobacter sp, Klebsiella sp. from chicken meat samples. Treatment Kating garlic, single garlic, and black garlic at concentrations of 20%, 40%, 60%, 80%, 90%, 100%. This study observed the inhibition zone on Muller Hinton Agar (MHA) media that had been planted with bacterial isolates. The inhibition test uses the disk diffusion method. The findings revealed that kating garlic and single garlic showed inhibition zones against Escherichia coli, Enterobacter sp., and Klebsiella sp. bacteria. Meanwhile, black garlic did not show an inhibition zone against E. coli bacteria, but showed an inhibition zone against Klebsiella sp., Enterobacter sp., and Kating garlic had the largest bacterial inhibition zone against E. coli, Klebsiella sp., Enterobacter sp., followed by single garlic.

Abstract The purpose of this study was to determine the resistance of several antibiotics phenotypically and genotypically to detect the tetA gene from broiler chicken liver samples at Dukuh Kupang market, Surabaya. A total of 30 samples were taken and then prepared aseptically and sterile. Isolation on Eosin Methylene Blue Agar (EMBA) media, then microscopic examination using gram staining and biochemical tests of Triple Sugar Iron Agar (TSIA), Sulfide Indole Motility (SIM), Methyl Red (MR), Voges Prouskauers (VP) and Simons Citrate Agar (SCA). The identified Escherichia coli colonies were tested for antibiotic sensitivity using the Kirby Bauer method, then isolates that were proven to be resistant to tetracycline antibiotics were followed by genetic testing using the Polymerase Chain Reaction (PCR) method. The results showed that 20 of the 30 samples were positive for Escherichia coli. Escherichia coli isolates from chicken liver samples showed resistance to 30 µg tetracycline antibiotics by 85% (17 of 20 samples) Researchers also compared with other antibiotics, the highest resistance to ampicillin 10 µg was 90% (18 out of 20 samples), gentamicin resistance was 10 µg by 50% (10 of 20 samples) and 30 µg chloramphenicol antibiotic resistance by 30% (6 of 20 samples). The isolates that were resistant to tetracycline were confirmed by Polymerase Chain Reaction to detect the tetA gene with the final product in the form of a band with a length of 210 bp. Bacterial isolates resistant to Tetracycline antibiotics did not always show TetA gene expression in the PCR test. Keywords: Antibiotic Resistance; Escherichia coli; Market; TetA gene   Abstrak Tujuan dari penelitian ini yaitu untuk mengetahui resistansi beberapa antibiotik secara fenotip dan secara genotip mendeteksi gen tetA dari sampel hati ayam broiler di pasar Dukuh Kupang Surabaya. Sebanyak 30 sampel diambil kemudian dipreparasi secara aseptis dan steril. Isolasi pada media Eosin Methilen Blue Agar (EMBA), selanjutnya dilakukan pemeriksaan mikroskopis menggunakan pewarnaan gram dan uji biokimiawi Triple Sugar Iron Agar (TSIA), Sulfide Indol Motility (SIM), Methyl Red (MR), Voges Prouskauers (VP), dan Simons Citrat Agar (SCA). Koloni Escherichia coli yang teridentifikasi dilakukan uji sensitifitas antibiotik dengan metode Kirby bauer, selanjutnya isolat yang terbukti resistan terhadap antibiotik tetrasiklin dilanjutkan pemeriksaan genetik dengan metode Polymerase Chain Reaction (PCR).  Hasil penelitian menunjukkan bahwa 20 dari 30 sampel positif Escherichia coli. Isolat Escherichia coli asal sampel hati ayam menunjukkan resistansi terhadap antibiotik Tetrasiklin 30 µg sebesar 85 % (17 dari 20 sampel) Peneliti juga melakukan perbandingan dengan antibiotik lainnya, resistensi tertinggi pada antibiotik ampisilin 10 µg sebesar 90 % (18 dari 20 sampel), resistensi gentamisin 10 µg sebesar 50 % (10 dari 20 sampel) dan resistensi antibiotik kloramfenikol 30 µg sebesar 30 % (6 dari 20 sampel). Isolat yang resisten terhadap tetrasiklin dikonfirmasi dengan Polymerase Chain Reaction untuk mendeteksi gen tetA dengan produk akhir berupa band dengan panjang 210 bp. Isolat bakteri yang resistan terhadap antibiotik Tetrasiklin tidak selalu menunjukkan ekspresi gen tetA pada uji PCR. Kata kunci: Escherichia coli; Gen TetA; Pasar; Resistansi Antibiotik.