<abstract xmlns="http://www.w3.org/1999/xhtml"><bold>Introduction:</bold> The objective of this study was to determine the current profile of bacteria responsible for the infection of the mammary gland and to assess their sensitivity to selected β-lactam antibiotics.<bold>Material and Methods:</bold> The study was conducted on 119 (n = 119) dairy cows of the Polish Black-White breed aged 4 to 10 years with inflammation of the mammary gland. The cows came from different farms: smallholder farms and large dairy cattle farms in the Lublin and Bialystok Provinces. Before the process of collection of milk samples, the teats were cleaned and immersed in a liquid disinfectant. The first streams were collected into containers which were subsequently utilised. Afterwards, 2-4 mL of milk or secretions was milked into sterile disposable tubes. The milk samples were collected into plastic bottles and kept in a cooler with ice until transportation to the laboratory. Tests of resistance to β-lactam antibiotics were performed by disc diffusion.<bold>Results:</bold> Contagious and environmental bacteria were isolated from all dairy barns. In the group of contagious bacteria, the presence of typical pathogens responsible for the mammary gland infections, <italic>i.e. Staph. aureus</italic>, <italic>Str. agalactiae</italic>, and <italic>C. bovis</italic>, was detected. A relatively broad group of the isolates was formed by environmental bacteria responsible for inflammation of the mammary gland: <italic>Str. dysgalactiae, Str. uberis, Staph. chromogenes, Staph. hyicus, Staph. warneri</italic>, and <italic>E. coli.</italic> Among the environmental organisms, streptococci constituted the largest percentage (23%), followed by staphylococci (13.2%), and <italic>E. coli</italic> (8.8%). The largest group of infectious pathogens comprised <italic>Str. agalactiae</italic> (29.6%) and <italic>Staph. aureus</italic> (20.8%).<bold>Conclusion:</bold> Our investigation of the current profile of the isolates responsible for mastitis in the Lublin and Bialystok Provinces showed that environmental bacteria are the major cause of the disease. In view of the substantially varying degrees of sensitivity of the microorganisms isolated from cases of mastitis to β-lactam antibiotics, each therapeutic treatment should be preceded by susceptibility testing.</abstract>

Introduction: The objective of this study was to determine the current profile of bacteria responsible for the infection of the mammary gland and to assess their sensitivity to selected β-lactam antibiotics.Material and Methods: The study was conducted on 119 (n = 119) dairy cows of the Polish Black-White breed aged 4 to 10 years with inflammation of the mammary gland. The cows came from different farms: smallholder farms and large dairy cattle farms in the Lublin and Bialystok Provinces. Before the process of collection of milk samples, the teats were cleaned and immersed in a liquid disinfectant. The first streams were collected into containers which were subsequently utilised. Afterwards, 2-4 mL of milk or secretions was milked into sterile disposable tubes. The milk samples were collected into plastic bottles and kept in a cooler with ice until transportation to the laboratory. Tests of resistance to β-lactam antibiotics were performed by disc diffusion.Results: Contagious and environmental bacteria were isolated from all dairy barns. In the group of contagious bacteria, the presence of typical pathogens responsible for the mammary gland infections, i.e. Staph. aureus, Str. agalactiae, and C. bovis, was detected. A relatively broad group of the isolates was formed by environmental bacteria responsible for inflammation of the mammary gland: Str. dysgalactiae, Str. uberis, Staph. chromogenes, Staph. hyicus, Staph. warneri, and E. coli. Among the environmental organisms, streptococci constituted the largest percentage (23%), followed by staphylococci (13.2%), and E. coli (8.8%). The largest group of infectious pathogens comprised Str. agalactiae (29.6%) and Staph. aureus (20.8%).Conclusion: Our investigation of the current profile of the isolates responsible for mastitis in the Lublin and Bialystok Provinces showed that environmental bacteria are the major cause of the disease. In view of the substantially varying degrees of sensitivity of the microorganisms isolated from cases of mastitis to β-lactam antibiotics, each therapeutic treatment should be preceded by susceptibility testing.

Activity of β-lactam antibiotics against certain microorganisms which cause mastitis in cows

Sub-Department of Pharmacology, Department of Preclinical Veterinary Sciences, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20-033 Lublin,

Department of Veterinary Pharmacy, National Veterinary Research Institute, 24-100 Pulawy,

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction: The objective of this study was to determine the current profile of bacteria responsible for the infection of the mammary gland and to assess...

Activity of β-lactam antibiotics against certain microorganisms which cause mastitis in cows

Published Online: Sep 23, 2016

Page range: 267 - 271

Received: Jan 28, 2016

Accepted: Jul 22, 2016

DOI: https://doi.org/10.1515/jvetres-2016-0041

Keywords
cow, mastitis, microorganisms, β-lactam antibiotics

© 2016 Artur Burmańczuk et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Activity of β-lactam antibiotics against certain microorganisms which cause mastitis in cows

Published Online: Sep 23, 2016

Page range: 267 - 271

Received: Jan 28, 2016

Accepted: Jul 22, 2016

DOI: https://doi.org/10.1515/jvetres-2016-0041

Keywordscow, mastitis, microorganisms, β-lactam antibiotics

© 2016 Artur Burmańczuk et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
cow, mastitis, microorganisms, β-lactam antibiotics