02315nas a2200253   4500000000100000000000100001008004100002260007000043653000800113653001300121653001300134653001500147653001000162100001600172700001300188700001100201700001700212700001300229700001400242245013400256490000800390520164900398022001402047       2018                            d  c09/2018bSchlütersche Verlagsgesellschaft mbH & Co. KGaHannover10aTGD10aMastitis10apathogen10aresistance10audder1 aA Schabauer1 aK Rychli1 aB Lung1 aJ Hofrichter1 aM Wagner1 aG Schoder00aVeterinary Health Service in Upper Austria: Dairy farms and bovine quarter milk sample analysis from 2011 to 2014 – an overview0 v1313 aThe Veterinary Health Service („Tiergesundheitsdienst“, TGD), an organisation of veterinarians  and farmers, has been established for all federal states of Austria but Vienna. Here we present data concerning Upper Austrian dairy farms and results of bacteriological  analysis of bovine quarter milk samples from the Upper Austrian TGD laboratory  between 2011 and 2014, especially relating to prevalence and antibiotic susceptibilities  of mastitis pathogens.  Microbial isolates from quarter milk samples of Austrian cows were cultivated and  identified using classical and advanced methods and tested for antibiotic susceptibility  by the microdilution method.  Generally, there has been a decrease in the number of milk suppliers and TGD farms  in Upper Austria. Almost 10500 milk samples were analysed at the Upper Austrian  TGD laboratory each year. Most commonly isolated udder pathogens in quarter milk  samples were Staphylococcus aureus (26%), Streptococcus uberis (22%) and non-aureus  staphylococci (15%). For many antibiotic agents we found high antimicrobial susceptibility  of tested isolates. However, also an increasing prevalence of resistant strains  against the beta-lactam antibiotics and the macrolide tylosin was detected. The mean  proportion of multi-resistant isolates in staphylococci and streptococci isolates was  below 5%.  This longitudinal study acknowledges changes in the structure of Austrian dairies, the  occurrence of mastitis pathogens and their antibiotic susceptibilities. Such adaptations  could suggest the need for new types of farm management, together with preventive  and treatment strategies.   a0005-9366