The goal of Dr. Whist’s work was to reduce the incidence of the most common bacteria that cause mastitis in Norwegian dairy herds, Staphylococcus aureus and Streptococcus dysgalactiae, and to reduce the incidence of clinical mastitis (inflammation of the udder).
Through systematic milk sampling, and treatment and follow-up of animals with high cell counts in the milk (cows with an udder inflammation, but without symptoms), the incidence of the most common bacterium that causes mastitis in Norway, S. aureus, was strongly reduced, and clinical mastitis was reduced by 15%. Whist’s studies showed that sealing off the teats and teat-dipping in disinfectant did not have the good preventative effects that were expected.
-Udder health in Norwegian dairy cows is good, compared to other countries, and the quality of milk delivered to factories in Norway is extremely good. Nevertheless, we still find S. aureus and S. dysgalactiae in a relatively high proportion of cows. Other mastitis-causing bacteria that are more common in other countries are very rare in Norway, says Anne Cathrine Whist.
Dr. Whist studied 213 herds. A systematic udder health control system was designed, where animals with high milk cell counts and with demonstrable S. aureus or S. dysgalactiae were put on antibiotic treatment and a period of non-milking. Both the farmer and treating veterinarian focussed on how available data could be utilised in preventative health work and together decided which animals should continue milking, which should be treated, and which should be sent to slaughter. The aim of this focus was to reduce the infection pressure in the herd and optimise milking routines and the function of the milking equipment.
The system was further developed and is now available to all dairy farmers on internet. The udder health control system ensures good milk production from healthy animals and places the cow in the best possible position to meet a new period of lactation (milking). The system is being developed as part of the udder health program of the Norwegian Cattle Health Services.
This doctorate has been a collaboration between TINE BA, the Norwegian Cattle Health Service, the Norwegian School of Veterinary Science, the Norwegian Research Council, Boehringer-Ingelheim, Akselsens Agenturer and DeLaval. The field work was done on 213 dairy herds in Rennebu, Meldal, and Nesset in Møre og Romsdal, and in Varhaug, Tu and Sandnes in Rogaland, in collaboration with 18 practising veterinary surgeons.
Cand. Med. Vet Anne Cathrine Whist defended her Ph. D. thesis on December 19 at the Norwegian School of Veterinary Science, with the title: “Production management using the Norwegian Health Periodical: a tool to eliminate Staphylococcus aureus and Streptococcus dysgalactiae.”
Magnhild Jenssen | alfa
Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State
How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy