Phenotypic and Genotypic Analysis of Antimicrobial Resistance in Isolated from Pigs with Enzootic Pneumonia in Australia.

, an important cause of enzootic pneumonia in pigs in many countries, has recently been shown to exhibit reduced susceptibility to several antimicrobial classes. In the present study, a total of 185 pig lung tissue samples were collected from abattoirs in Australia, from which 21 isolates of were obtained. The antimicrobial resistance profile of the isolates was determined for 12 antimicrobials using minimum inhibitory concentration (MIC) testing, and a subset ( = 14) underwent whole-genome sequence analysis.

Unravelling Antimicrobial Resistance in : Genetic Mechanisms and Future Directions.

Antimicrobial resistance (AMR) in , the causative agent of Enzootic Pneumonia in swine, poses a significant challenge to the swine industry. This review focuses on the genetic foundations of AMR in , highlighting the complexity of resistance mechanisms, including mutations, horizontal gene transfer, and adaptive evolutionary processes. Techniques such as Whole Genome Sequencing (WGS) and multiple-locus variable number tandem repeats analysis (MLVA) have provided insights into the genetic diversity and resistance mechanisms of .

Redefining cross-resistance, co-resistance and co-selection: beyond confusion?

The similarity of current definitions of 'cross-resistance' and 'co-resistance' continues to cause confusion both in the scientific community as well as in understanding policies and in particular when looking at resistance from a risk assessment perspective. Further, lack of harmonized definitions of these terms in the regulatory space is challenging for interpretation. The purpose of this article is to: (i) provide an overview of the ambiguity in existing terminology related to cross-resistance, co-resistance and co-selection; (ii) emphasize the challenges created by the use of poor terminology in research and scientific literature; and (iii) propose a clear set of harmonized definitions that could be put into use through international regulatory agencies and institutions, such as the World Health Organization, Food and Drug Administration, European Medicines Agency, Center for Disease Control, Committee for Veterinary Medicinal Products, World Organization for Animal Health/Office International des Epizooties and the Food and Agriculture Organization of the United Nations.