In the present study trajectories for the disease categories udder diseases, metabolic diseases, all diseases, fertility diseases, and ovarian problems, are described. Variance components were estimated where the considered period of lactation varies between 50 and 300 days. Furthermore, the impact of the number of daughters per sire was analysed with disease information from the first 50 days ...

Clinical mastitis (CM) is the most common veterinary treated disease in Swedish dairy cattle. To investigate if the distribution of veterinary registered cases of CM in Sweden follows that of the spatial distribution of cows with high somatic cell counts (SCCs), the spatial distribution of CM odds was estimated from available records and compared with udder health measures based on measurements...

Quantitative trait loci affecting conformational type traits were studied in seven large grandsire families of US Holsteins using the granddaughter design and 16 microsatellite markers on 10 chromosomes. The most significant marker effect was marker BM203 (chromosome 27) for dairy form in a single grandsire family. A multivariate analysis for dairy form and milk yield was also conducted, and th...

This investigation has shown that collateral intramammary reactions (CIR's) occur when secretory disturbances in one quarter lead to corresponding changes in one or more of the other, unperturbed, quarters of the same udder. Compared with normal baseline values, the mean values and variations of bovine serum albumin (BSA), beta-N-acetyl-D-glucosaminidase (NAG), mannose (MAN), galactose (GAL) an...

The effect of pimozide and/or TRH was investigated on plasma prolactin, thyrotropin, T(4) and T(3) and udder distension in 38 ewes during drying off by feed restriction. The effect of daily injections of 2mg pimozide (s.c.), combined or not with TRH stimulation (200µg, i.v.) on three different days of the drying off period was examined. Blood samples were taken twice daily in each group for 9 d...

Effect of three hygienic conditions (T1washing and disinfection of udder and teats, milker hands, and a sanitary rinse of milking pails using calcium hypochlorite solution with 200 ppm Cl; T2washing of udder and teats, milker hands and milking pails with normal water; and T3without any kind of preparation of udder and teats, milker hands and milking pails) before milking were studied. Fifteen “...

*I.C. Klaas, C. Enevoldsen, M. Vaarst, H. Houe *Danish Institute of Agricultural Science, Department of Animal Health and Welfare, P.O.Box 50, DK-8830 Tjele, Danmark The Royal Veterinary and Agricultural University, Department of Clinical Studies, Large Animal Medicine, 1870 Frederiksberg C, Denmark The Royal Veterinary and Agricultural University, Department of Animal Science and Animal Health...

On July 5, 1996, scientists at Scotland’s Roslin Institute succeeded in cloning the first livestock mammal using a somatic cell obtained from an adult animal. To produce Dolly the sheep, researchers replaced the nucleus of an egg with a nucleus isolated from the udder of a six-year old sheep. Roslin Institute announced Dolly’s birth in early 1997. The news incited visions of herds of cloned ani...

BACKGROUND Research has indicated that a number of different factors affect whether an animal receives treatment or not when diseased. The aim of this paper was to evaluate if herd or individual animal characteristics influence whether cattle receives veterinary treatment for disease, and thereby also introduce misclassification in the disease recording system. METHODS The data consisted main...