Three therapeutic regimens were evaluated in 121 cows naturally infected with Brucella melitensis or Brucella abortus, using a combination of long-acting oxytetracycline (LA-OTC), streptomycin (ST) and OTC-intramammary infusion (IMI). Cessation of shedding of Brucella in udder secretions and absence of Brucella in selected tissues were considered criteria for successful treatment. Regimen A (te...

The article highlights the relevance of udder hygiene, sources milk contamination with microflora, treatment requirements, sanitary condition control teats skin cow udders, as well a list products authorized in Ukraine.
 Proper preparation for milking, namely: special detergents and disinfectants, compliance correct milking procedure significantly reduce risk cows mastitis increase yield. ...

A multitrait animal model was used to calculate predicted transmitting ability and reliabilities for final score and 15 linear type traits of 225,632 US Jersey cows. Records were adjusted for age and stage of lactation before analysis. The model contained effects for interactions of herd and date scored; year scored, parity, and age; and herd and sire; effects of permanent environment and addit...

1 Dept. of Agronomy Food Natural resources Animal Environment, Agripolis, 35020 Legnaro (PD), Italy 2 Address correspondence to: [email protected] ABSTRACT The aim of the study was to estimate heritabilities (h2) of type traits and linear description scores in Rendena breed. Five traditional summary traits and 20 linear descriptions were recorded on 9,776 Rendena primiparous cows. ...

The major milk fraction stored in the bovine udder, the alveolar milk, is not available for milk removal before being actively shifted to the cisternal cavities by the milk ejection reflex (Knight et al. 1994; Pfeilsticker et al. 1996). Tactile teat stimulation, provided by the liner throughout milking, causes continuous release of oxytocin from the neuropituitary into the blood circulation, wh...

Characteristic of the udder, milk traits and their relationship were investigated in 32 Awassi ewes raised in a commercial flock. Commencing one month after lambing milk yield was recorded at monthly intervals until the ewes were dried. Also, the udder traits were measured, including udder width, udder circumference, udder length, distance between teats and length and diameter of both teats. Re...

Individual quarter samples from some 19 cows on average were investigated monthly over 12 months for determining the udder health status of cows and the glucose concentrations of foremilk and strippings. Foremilk showed a mean 0,1311 mM concentration of glucose which remained fairly stable during the period of investigation and lactation. A fluctuating mean value of 0,2037 mM was determined in ...

The purpose of milking machines is to harvest milk at optimal quality and speed, while maintaining animal comfort teat defense mechanisms against invading mastitis pathogens. Therefore, the machine a very important piece equipment on dairy farms maintain long healthy lactation by following physiological conditions udder. mechanical forces during long-term processes lead changes in tissue. This ...