In Vitro Antibiotic Susceptibility of Field Isolates of Mycoplasma synoviae in Argentina
- 1 January 2002
- journal article
- Published by American Association of Avian Pathologists (AAAP) in Avian Diseases
- Vol. 46 (1), 215-218
- https://doi.org/10.1637/0005-2086(2002)046[0215:ivasof]2.0.co;2
Abstract
Minimum inhibitory concentrations (MICs) were determined in vitro for 7 antibiotics (aivlosin, enrofloxacine, tylosin, tiamulin, kitasamycin, chlortetracycline, and oxytetracycline) against eight recent local Argentinean isolates and two standard strains of Mycoplasma synoviae. Aivlosin (3-acetyl-4"-isovaleryl tylosin tartrate), tylosin, and tiamulin showed the lowest MICs with MIC90s of 0.006, 0.012, and 0.05 µg/ml, respectively. Except one strain that showed resistant values to chlortetracycline (≥12.5 µg/ml), all the analyzed strains were susceptible in different degrees to all the antibiotics tested. In this study, the improved activity of the tylosin-derived drug, aivlosin, was confirmed because it showed, in most strains, MIC values half those for tylosin.Keywords
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