Acta Veterinaria et Zootechnica Sinica ›› 2024, Vol. 55 ›› Issue (6): 2701-2715.doi: 10.11843/j.issn.0366-6964.2024.06.041

• Basic Veterinary Medicine • Previous Articles     Next Articles

Establishment on Commonly Used Antimicrobials Epidemiological Cut-off Values of Mycoplasma synoviae

Ziying ZOU(), Anxiong HUANG, Zihan RUAN, Haihong HAO*()   

  1. State Key Laboratory of Agricultural Microbiology (HZAU), National Reference Laboratory of Veterinary Drug Residues (HZAU), The Key Laboratory for the Detection of Veterinary Drug Residues, Ministry of Agriculture(HZAU), National Laboratory for Safety Evaluation of Veterinary Drugs(HZAU), Laboratory of Quality & Safety Risk Assessment for Livestock and Poultry Products (Wuhan), Wuhan 430070, China
  • Received:2023-07-18 Online:2024-06-23 Published:2024-06-28
  • Contact: Haihong HAO E-mail:zzy15179469958@163.com;haohaihong@mail.hzau.edu.cn

Abstract:

Mycoplasma synoviae (MS) is one of the most detrimental mycoplasmas in the large-scale poultry industry. Meanwhile, the development of antimicrobial resistance to MS is serious currently. In order to understand the current situation of antimicrobial resistance to MS, the research was conducted in reference to the method of establishing epidemiological/wildtype cut-off values (ECOFFs/COWT) in CLSI and EUCAST by collecting and summarizing MIC from different regions and sources in recent 5 years after searching relevant literature reports at home and abroad, and then the ECOFFs of various antimicrobial agents to MS were obtained through comprehensive analysis using visual estimation, ECOFFFinder software analysis and Normalized Drug Resistance Interpretation (NRI). Subsequently, the corresponding drug resistance rates were calculated. It showed that the ECOFFs of MS to tylosin, tilmicosin, tylvalosin, doxycycline, oxytetracycline, chlortetracycline, tiamulin, lincomycin, florfenicol and spectinomycin were 1, 0.5, 0.5, 2, 4, 2, 2, 2, 8 and 4 μg·mL-1 respectively. In absence of sensitive breakpoint of MS in CLSI and ECUAST, the theoretical basis and scientific evidence are provided by this research for the rational use of drugs in clinical practice, development of antimicrobial resistance work for monitoring and reducing it, and also beneficial for the treatment and control of MS.

Key words: Mycoplasma synoviae, epidemiological cut-off values, drug resistance, ECOFFinder software, normalized drug resistance interpretation (NRI)

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