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Daily News

23.11.09

Many Escherichia coli infections have their origin in the dry period.

Quarter milk samples were taken from 480 cows at dry-off and then at weekly intervals from 14 days pre-calving to one week post calving. A major mastitis pathogen was isolated from at least one quarter of 220 cows (48.5%). The...more

12.10.09

Molecular typing of Klebsiella pneumoniae reveals a high level of genetic diversity between and within herds

598 clinical and 18 subclinical Klebsiella pneumoniae isolates were collected from six dairy U.S. dairy herds in four states. Bulk milk and bedding samples were also collected from one dairy. A total of 635 isolates were...more

14.09.09

Timing of immune response in the udder is dependent on the type of infecting bacteria

It is accepted that the outcome of an udder infection is influenced by the pathogen species. In this study the authors established an infection model to better analyze the molecular causes for pathogen-specific effects, using...more

31.08.09

High SCC at drying off or at the first two tests post calving increases the risk for clinical mastitis

Data from 350 herds enrolled in the Norwegian Dairy Herd Recording System (NDHRS) were used to investigate the associations between the first two somatic cell counts (SCC) test-days' results after calving or the three last SCC’s...more

17.08.09

Infection in one quarter influences cell activity in the remaining three quarters

Udder anatomy implies that infection of one udder quarter does not influence the immune status of neighbouring quarters. In this study, the authors compared the immune reactions of individual udder quarters in response to...more

20.07.09

Mechanism of persistent intramammary E. coli infection revealed

Escherichia coli is a major pathogen in the aetiology of bovine mastitis. Although classically considered to be an environmental pathogen causing mainly transient infection, the incidence of persistent E. coli mastitis infections...more

06.07.09

Increased SCC premium leads to a reduction of SCC in the bulk milk

The objective of this study was to evaluate a premium program for very high quality milk. The actual amount of the low bulk tank somatic cell count (BTSCC) premium varied from $0.15 per hundred pounds (cwt.) of milk to $1.00/cwt....more

29.06.09

The immune response to an udder infection is influenced by the pathogen species

Animals inoculated with S. aureus showed no or only modest clinical signs of mastitis. However, E. coli caused clinical signs in animals. Infection with E. coli strongly and significantly upregulated expression of beta-defensins,...more

15.06.09

Pathogen specific cytokine patterns revealed

Staphylococcus aureus and Escherichia coli are among the most prevalent species of gram-positive and gram-negative bacteria, respectively, that induce clinical mastitis. The innate immune system comprises the immediate host...more

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