Escherichia coli is a group of Enterobacteriaceae bacteria that often contaminate food so that it can cause diarrhea. These bacteria are very difficult to treat if they are able to produce the Extended-Spectrum Beta-Lactamases (ESBLs) enzyme. The purpose of this study was to identify ESBLs-producing E. coli in food samples in Krian Sidoarjo. Food samples (fried foods, cilok tempura and chili sauce) were collected from ten different places. The sample was then grown on Eosin Methylene Blue (EMB) medium and purified by the 16 streak method, as well as biochemical character tests. The ESBLs phenotypic E. coli method was carried out by screening test and confirmation test using a Double Disk Synergy Test (DDST). Thirty colonies were able to grow on EMB media, but after microscopic identification and biochemistry testing only four samples were E. coli positive and were able to produce ESBLs from the phenotypic test that had been carried out. ESBLs-producing E. coli testing is important not only for nosocomial infections but also for the community so it needs attention to the spread of ESBLs resistance among microorganism species. Escherichia coli termasuk kelompok bakteri Enterobacteriaceae yang sering mengkontaminasi makanan sehingga dapat menyebabkan diare. Bakteri ini sangat sulit diobati apabila mampu memproduksi enzim Extended Spectrum Beta-Lactamases (ESBLs). Tujuan penelitian ini adalah untuk mengindetifikasi E. coli penghasil ESBLs pada sampel makanan di Krian Sidoarjo. Sampel makanan (gorengan, cilok, tempura, dan saus sambal) dikumpulkan dari sepuluh tempat berbeda. Sampel kemudian ditumbuhkan pada medium Eosin Metilen Blue (EMB) dan dimurnikan dengan metode streak 16, serta dilakukan karakteristik uji biokimia. Metode fenotipik E. coli penghasil ESBLs dilakukan dengan uji skrining dan uji konfirmasi menggunakan double disk synergy test (DDST). Sebanyak tiga puluh koloni mampu tumbuh pada media EMB, namun setelah diidentifikasi mikroskopis dan uji biokiomia hanya empat sampel positif E. coli dan mampu menghasilkan ESBLs dari uji fenotipik yang telah dilakukan. Pengujian E. coli penghasil ESBLs penting dilakukan bukan hanya pada infeksi nosokomial, tetapi juga pada komunitas sehingga perlu mendapat perhatian terhadap penyebaran resistensi ESBLs diantara spesies mikroorganisme.
Helicobacter pylori termasuk bakteri patogen oportunistik yang berkolonisasi di lambung dan mampu memicu terjadinya peradangan lokal. Infeksi bakteri ini apabila tidak segera diobati dapat berkembang menjadi penyakit yang lebih serius seperti gastritis atrofi, metaplasia usus, dan noncardia gastric adenocarcinoma. Penelitian ini bertujuan untuk mengetahui aktivitas nanoemulsi minyak lengkuas (Alpinia galanga L. Willd) dalam menghambat pertumbuhan bakteri H. pylori. Nanoemulsi minyak lengkuas dibuat dengan mencampurkan fase air sedikit demi sedikit ke dalam fase minyak dan surfaktan dengan bantuan magnetic stirrer dan ultrasonikator. Karakterisasi nanoemulsi minyak lengkuas dilakukan dengan alat Particle Size Analyzer (PSA) untuk mengetahui ukuran droplet yang terbentuk dan spektrofotometer UV-Vis pada panjang gelombang 630 nm untuk mengetahui persentase transmitan. Uji aktivitas antibakteri nanoemulsi minyak lengkuas terhadap H. pylori dilakukan dengan metode difusi sumuran. Hasil penelitian menunjukkan bahwa nanoemulsi minyak lengkuas mampu menghambat pertumbuhan bakteri H. Pylori. Pada konsentrasi yang paling rendah (kadar hambat minimum=KHM) yaitu 1% (ukuran droplet 19,9 nm) memiliki zona penghambatan sebesar 9,5 mm. Nanoemulsi minyak lengkuas dapat digunakan sebagai kandidat pengobatan infeksi lambung yang disebabkan oleh H. pylori.
ZnO and Ag nanoparticle have known their antibacterial activity especially their use in medical materials. In this study, ZnO-Ag Nanocomposite was synthesized by ultrasonication-microwave combination method with variation of reaction time using clove oil as their bioreductor. ZnO-Ag was prepared from ZnO Acetate as a source of ZnO and AgNO3 as a source of Ag. The crystallinity structure, average particle size, morphology, and composition of ZnO-Ag was characterized by X-Ray Diffraction, Scanning Electron Microscope, and Energy Dispersive X-ray Spectroscopy. X-ray diffraction pattern indicates that reaction time of 30 minutes have optimal synthesis results. The nanocomposite obtained consists of 43.2 % Ag nanoparticle, 17.5 % hexagonal Zincite, 14.6% Zinc Oxide, 14.5% wulfingite (deuterated), and 10.2% Zn(OH)2 with average particle size of 28.29 nm according to Scherer’s equation. The result of scanning electron microscope showed that ZnO has an fiber shape and Ag has a round shape.
Pseudomonas aeruginosa is a Gram-negative bacterium that often causes nosocomial infection because of its ability to produce biofilms so that it is resistant to various antibiotics. This research aims to determine the activity of zinc oxide-silver nanocomposites (ZnO-Ag) with clove oil against P. aerugoinosa bacteria. ZnO-Ag nanocomposites were made using the Green One Pot Synthesis technique using a sonicator and microwave instruments. The nanocomposites formed were characterized by X-Ray Diffraction (XRD) to determine crystallinity and particle size and Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) to determine morphology and elements. The antibacterial activity and antibiofilm tests were carried out using the well diffusion and the microplate techniques, respectively. The resulted ZnO-Ag nanocomposite formed had a size of 19.66 nm, where Ag (47%) was of round shape, while Zn (35%) and O (18%) were fibrous. The ZnO-Ag had an inhibition zone of 14.9 mm against P. aeruginosa and was able to prevent the attachment of the bacterial biofilm for 48 hours with 76,59% inhibition percentage. Pseudomonas aeruginosa merupakan bakteri Gram negatif yang sering menyebabkan infeksi noskomial karena kemampuannya menghasilkan biofilm sehingga resisten terhadap berbagai antibiotik. Penelitian ini bertujuan untuk mengetahui aktivitas nanokomposit seng oksida-perak (ZnO-Ag) dengan minyak cengkeh terhadap P. aeruginosa. Nanokomposit ZnO-Ag dibuat dengan teknik Green One Pot Synthesis menggunakan instrumen sonikator dan gelombang mikro. Nanokomposit yang terbentuk dikarakterisasi menggunakan X-Ray Diffraction (XRD) untuk mengetahui kristalinitas dan ukuran partikel, Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX) untuk mengetahui morfologi dan unsur yang terbentuk. Uji aktivitas antibakteri dilakukan dengan metode difusi sumuran dan uji antibiofilm dilakukan dengan teknik microplate. Hasil nanokomposit ZnO-Ag yang terbentuk memiliki ukuran sebesar 19,66 nm, dimana Ag (47%) berbentuk bulat sedangkan Zn (35%) dan O (18%) berbentuk fiber. Nanokomposit ZnO-Ag memunculkan zona hambat 14,9 mm terhadap P. aeruginosa dan mampu mencegah penempelan biofilm yang dihasilkan bakteri tersebut selama 48 jam dengan penghambatan 76,59%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.