Antibiotic susceptibility profiles of Mycoplasma synoviae strains originating from Central and Eastern Europe

• Published in: BMC veterinary research 2017-11, Vol.13 (1), p.342-342, Article 342
• Main Authors: Kreizinger, Zsuzsa, Grózner, Dénes, Sulyok, Kinga M, Nilsson, Kristin, Hrivnák, Veronika, Benčina, Dušan, Gyuranecz, Miklós
• Format: Article
• Language: English
• Subjects: Animals; Anti-Bacterial Agents - pharmacology; Anti-Bacterial Agents - therapeutic use; Antibacterial agents; Antibiotic resistance; Antibiotics; Chicken; Chickens - microbiology; Disease susceptibility; Diterpenes - pharmacology; Diterpenes - therapeutic use; Dosage and administration; Doxycycline - pharmacology; Doxycycline - therapeutic use; Europe; Europe, Eastern; Health aspects; Infection; MIC; Microbial Sensitivity Tests; Microbroth dilution; Mycoplasma Infections - drug therapy; Mycoplasma Infections - microbiology; Mycoplasma Infections - veterinary; Mycoplasma synoviae; Mycoplasma synoviae - drug effects; Oxytetracycline - pharmacology; Oxytetracycline - therapeutic use; Pleuromutilins; Polycyclic Compounds; Poultry Diseases - drug therapy; Poultry Diseases - microbiology; Turkey; Turkeys - microbiology; Tylosin - analogs & derivatives; Tylosin - pharmacology; Tylosin - therapeutic use; Vaccination
• ISSN: 1746-6148; 1746-6148
• DOI: 10.1186/s12917-017-1266-2

Mycoplasma synoviae causes infectious synovitis and respiratory diseases in chickens and turkeys and may lead to egg shell apex abnormalities in chickens; hence possesses high economic impact on the poultry industry. Control of the disease consists of eradication, vaccination or medication. The aim of the present study was to determine the in vitro susceptibility to 14 different antibiotics and an antibiotic combination of M. synoviae strains originating from Hungary and other countries of Central and Eastern Europe. Minimal inhibitory concentration (MIC) values of a total of 41 M. synoviae strains were determined by the microbroth dilution method. The strains were collected between 2002 and 2016 and originated from Hungary (n = 26), Austria (n = 3), the Czech Republic (n = 3), Slovenia (n = 3), Ukraine (n = 3), Russia (n = 2) and Serbia (n = 1). Tetracyclines (with MIC values of 0.078 μg/ml, ≤0.25 μg/ml and 0.5 μg/ml for doxycycline, oxytetracycline and chlortetracycline, respectively), macrolides (with MIC values of ≤0.25 μg/ml for tylvalosin, tylosin and tilmicosin), pleuromutilins (with MIC values of 0.078 μg/ml and ≤0.039 μg/ml for tiamulin and valnemulin) and the combination of lincomycin and spectinomycin (MIC 1 μg/ml (0.333/0.667 μg/ml)) were found to be the most effective antibiotic agents against M. synoviae in vitro. High MIC values were detected in numerous strains for fluoroquinolones (with MIC values of 1.25 μg/ml and 2.5 μg/ml for enrofloxacin and difloxacin), neomycin (MIC 32 μg/ml), spectinomycin (MIC 2 μg/ml), lincomycin (MIC 0.5 μg/ml) and florfenicol (MIC 4 μg/ml). Nevertheless, strains with elevated MIC values were detected for most of the applied antibiotics. In the medical control of M. synoviae infections the preliminary in vitro antibiotic susceptibility testing and the careful evaluation of the data are crucial. Based on the in vitro examinations doxycycline, oxytetracycline, tylvalosin, tylosin and pleuromutilins could be recommended for the therapy of M. synoviae infections in the region.