# Assessment of Eravacycline Antimicrobial Susceptibility in China During the First Year Following Regulatory Approval (2023–2024): A Real-World Study

## TL;DR

This study evaluates eravacycline's effectiveness against drug-resistant bacteria in China after its approval, showing strong in vitro activity against common pathogens.

## Contribution

The study provides real-world data on eravacycline's antimicrobial susceptibility in China, highlighting its potential against carbapenem-resistant pathogens.

## Key findings

- Eravacycline showed 95.5% susceptibility against Acinetobacter baumannii and 92.5% against Klebsiella pneumoniae.
- High carbapenem resistance was observed in A. baumannii (91.3%) and K. pneumoniae (82.4%).
- Eravacycline demonstrated potential activity against resistant isolates in real-world clinical settings.

## Abstract

Eravacycline, a novel fluorocycline antimicrobial, was approved by China’s National Medical Products Administration (NMPA) in March 2023; however, clinical breakpoints and real-world data on its use in China remain limited. We conducted a retrospective, questionnaire-based analysis of eravacycline use across 21 provinces in China during the first year after NMPA approval (September 2023–September 2024). Data from 3369 patients who received eravacycline were collected. We analyzed the distribution of pathogens and specimens, reported in vitro susceptibility to eravacycline, imipenem, meropenem, tigecycline, and polymyxins and evaluated microbiological outcomes. Acinetobacter baumannii (52.0%, 1259/2419) and Klebsiella pneumoniae (26.1%, 631/2419) were the most commonly reported pathogens. High levels of carbapenem resistance were observed: 704 of 771 (91.3%) for A. baumannii and 323 of 392 (82.4%) for K. pneumoniae. In contrast, susceptibility to eravacycline was 95.5% (737/772) and 92.5% (297/321), respectively. Microbiological outcomes suggested potential activity against these resistant isolates, though post-treatment culture data were limited. This study demonstrates that eravacycline exhibited potent in vitro activity against prevalent carbapenem-resistant Gram-negative pathogens in real-world Chinese clinical practice during its first-year post-approval. Continuous monitoring of eravacycline resistance trends, together with prospective studies that correlate microbiological and clinical outcomes in specific infection types, will be crucial for defining its long-term therapeutic utility and the risk of resistance emergence.