Antimicrobial activity of danofloxacin regarding to bacteria, pathogens of respiratory infections in pigs


  • T. I. Stetsko State Scientific-Research Control Institute of Veterinary Medicinal Products and Feed Additives, Lviv, Ukraine https://orcid.org/0000-0002-9240-2191
  • I. Ia. Kotsiumbas State Scientific-Research Control Institute of Veterinary Medicinal Products and Feed Additives, Lviv, Ukraine https://orcid.org/0000-0002-9287-3997
  • Ya. M. Liubenko State Scientific-Research Control Institute of Veterinary Medicinal Products and Feed Additives, Lviv, Ukraine
  • V. N. Padovskyi State Scientific-Research Control Institute of Veterinary Medicinal Products and Feed Additives, Lviv, Ukraine
  • H. P. Uhryn State Scientific-Research Control Institute of Veterinary Medicinal Products and Feed Additives, Lviv, Ukraine
Keywords: fluoroquinolones, danofloxacin, pigs, respiratory infections, bacteria, Streptococcus suis, Bordetella bronchiseptica, antimicrobial sensitivity of microorganism, minimal inhibitory concentration

Abstract

The objective of the research was to study the antimicrobial activity of danofloxacin, the third-generation fluoroquinolone antibiotic, against bacteria, pathogens of acute respiratory infection in pigs. Samples of nasal excretions were selected from clinically sick weaned piglets with acute respiratory infection for microbiological investigation. The sensitivity test, carried out by the disc-diffusion method, showed a high level of the microflora sensitivity of the inflammatory exudate to danofloxacin. Bacteria Streptococcus suis and Bordetella bronchiseptica have been isolated and identified from biomaterial by generally accepted microbiological methods. The degree of antimicrobial activity of danofloxacin against isolated strains of microorganisms was established by determination the minimum inhibitory concentration (MIC) of danofloxacin for isolated bacteria by consecutive dilutions in a liquid nutrient medium. The MIC average of danofloxacin for Streptococcus suis isolates (n = 20) was 0.33 ± 0.082 μg/ml and for Bordetella bronchiseptica isolates (n = 8) – 0.21 ± 0.044 μg/ml. The obtained results showed a high level of bacteriostatic activity of danofloxacin regarding bacterial isolates, pathogens of acute respiratory infection in pigs. Danofloxacin, like other fluoroquinolones, is a critical antimicrobial substance for veterinary medicine. Therefore, chemotherapeutic agents based on this antibiotic can serve as a drug of choice for empirical treatment of pigs with acute respiratory infections of bacterial etiology. To right choose an effective agent for etiotropic therapy and minimize the selection of resistant strains of microorganisms, the antimicrobial susceptibility of isolated bacteria should be pre-established.

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Published
2019-11-02
How to Cite
Stetsko, T., Kotsiumbas, I., Liubenko, Y., Padovskyi, V., & Uhryn, H. (2019). Antimicrobial activity of danofloxacin regarding to bacteria, pathogens of respiratory infections in pigs. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Veterinary Sciences, 21(95), 22-26. https://doi.org/10.32718/nvlvet9504