Key Laboratory of Livestock and Poultry Multi-omics of MARA 1 article published in JoVE Environment Application of the Intelligent High-Throughput Antimicrobial Sensitivity Testing/Phage Screening System and Lar Index of Antimicrobial Resistance Ming Hu1, Zhengjie Liu1,2, Ziang Song1,3, Lulu Li1, Xiaonan Zhao1, Yanbo Luo1, Qing Zhang1, Yibao Chen1, Xiaohui Xu1, Yahui Dong1, Nataliia Hrabchenko1, Wei Zhang3, Yuqing Liu1 1Shandong Key Laboratory of Animal Disease Control and Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, P.R. China, Key Laboratory of Livestock and Poultry Multi-omics of MARA, 2Department of Genetic and Genomes Biology, University of Leicester, 3College of Veterinary Medicine, Nanjing Agricultural University Here we introduce the principle, structure, and instruction of the intelligent high-throughput antimicrobial sensitivity testing/phage screening system. Its application is illustrated by using Salmonella isolated from poultry in Shandong, China, as an example. The Lar index is calculated, and its significance in evaluating antimicrobial resistance is discussed comprehensively.