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Association af Changes in the Bacterial Ecology of Bovine Mastitis with Changes in the use of Milking Machines and Antibacterial Drugs
Sambandet mellan förändringar i bakterie ekologi vid bovin mastit och förändringar i användandet av mjölkningsmaskiner och antibakteriella preparat
Acta Veterinaria Scandinavica volume 35, pages 363–369 (1994)
Abstract
The results of mastitis bacteriology made by the National Veterinary and Food Research Institute in Finland during the past 50 years (1.15 million samples) are viewed in relation to simultaneous changes in dairy cow management. Although intensive preventive measures have been applied for decades, the prevalence of bovine mastitis has not decreased. Instead, pathogenic bacteria are becoming progressively less susceptible to the available therapy. In part this must be due to the emergence of antibiotic resistant strains of bacteria, but it seems that the bacterial spectrum has also changed. The incidence of Streptococcus agalactiae (group B streptococci) has decreased, while in contrast, the incidence of staphylococci, initially Staphylococcus aureus and later coagulase-negative staphylococci, has increased. Results suggest that external pressure, like changes in animal husbandry, including antimicrobial treatments and introduction of modern milking machines, act as selective forces on the bacterial species which cause bovine mastitis.
Sammanfattning
Resultaten av mastit bakteriologi, som Anstalten för Veterinärmedicin och Livsmedel har samlat in under en period på 50 år har granskats genom att jämföra samtida förändningar inom kreaturskötseln. Mastit prevalensen har inte minskat trots att man i flere decennier utfört preventiva åtgärder. De patogena bakterierna har däremot blivit mindre känsliga för den använda terapin. Detta kan delvis bero på att det utvecklats antibiotikaresistentta stammar, men även bakteriespektret ser ut att ha förändrats. S. agalactiaes andel har minskat samtidigt som stafylokockernas andel ökat, först S. aureus och senare de koagulasnegativa stafylokockerna. Resultaten antyder att yttre faktorer, tex. förändringar i kreaturskötsel, inkluderande antibiotika och användandet av mjölkningsmaskiner, skulle vara komponenter som förändrat spektret av mastit förorsakande bakterier.
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Myllys, V., Honkanen-Buzalski, T., Huovinen, P. et al. Association af Changes in the Bacterial Ecology of Bovine Mastitis with Changes in the use of Milking Machines and Antibacterial Drugs. Acta Vet Scand 35, 363–369 (1994). https://doi.org/10.1186/BF03548309
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DOI: https://doi.org/10.1186/BF03548309