Guidance for evaluating integrated surveillance of antimicrobial use and resistance
Authors: Rüegg Simon R. , Antoine-Moussiaux Nicolas , Aenishaenslin Cécile , Alban Lis , Bordier Marion , Bennani Houda , Schauer Birgit , Arnold Jean-Christophe , Gabain Isobel , Sauter-Louis Carola , Berezowski John , Goutard Flavie , Häsler Barbara , on behalf of the CoEvalAMR consortium  
Published: November 2022

Abstract
Antimicrobial resistance (AMR) resulting from antimicrobial use (AMU) is an emerging threat to global health. One of the key elements for a better understanding and management of AMU and AMR is to develop effective and efficient integrated surveillance systems that consider the complex epidemiology of these issues and the impacts of resistance on humans, animals and the environment. Consequently, for this project, an international consortium of experts from multiple fields called CoEvalAMR was formed with the objectives to study user needs, characterise and compare existing tools for the evaluation of integrated AMU and AMR surveillance, apply them to case studies, and elaborate guidance on the purpose-fit selection and the use of the tools. For the comparison of evaluation tools, questions were extracted from existing tools and attributed to themes, to assess the user needs, interviews were conducted with national key stakeholders, and we applied a series of different evaluation tools to understand and document their strengths and weaknesses. The guidance was refined iteratively. From 12 evaluation tools, 1117 questions/indicators were extracted and attributed to seven emerging themes. Twenty-three experts were interviewed, who suggested to increase the ease-of-use, grant open access, provide web-based interfaces and allow results to be automatically generated. Respondents also wished for tools providing the flexibility to conduct a rapid review, or an in-depth analysis of the surveillance system, depending on the evaluation objectives. The case studies emphasised that proper evaluations require adequate resources, typically requiring the involvement of several assessors and/or stakeholders, and can take weeks or months to complete. The resulting web-based guidance comprises six main sections: 1. Introduction to surveillance evaluation, 2. Evaluation of surveillance for AMU and AMR, 3. Evaluation tools, 4. Support for selecting an evaluation tool, 5. Case studies and 6. Directory of existing tools. The audience for the guidance is personnel working in public, private, and non-governmental organisations, from public health, animal health, plant health and environmental health, at local, national and international levels. We conclude that the field is challenged by opposing user needs for reduction and simplicity versus system approaches allowing the synthesis of that knowledge to sufficiently reflect the complexity of AMU and AMR ecology for real-world decisions. The CoEvalAMR web platform allows a better understanding of the different evaluation tools and assists users in the selection of an approach that corresponds to their evaluation needs. The CoEvalAMR consortium continues to address remaining gaps and consolidate evaluation tools and approaches in the future.

One Health Impact Statement
Antimicrobial resistance (AMR) resulting from antimicrobial use is a threat to human and animal health and may have unknown impacts on the environment. To understand how governance and human behaviour relate to AMR, it is important to implement integrated surveillance across the human, animal and environmental sectors. In this work, we describe the development of guidance on how to evaluate such surveillance, what the available tools cover and what gaps remain.
The integration of surveillance is essential to address the interrelated pathways across the system. Consequently, the work with the reporting interdisciplinary consortium revealed that the broad diversity of users and their needs imply that a sustained exchange is needed to address the evolving challenge. This will be important to develop meaningful measures of impact and to avoid fixing one sector’s problems at the expense of another.