In general the importance of functional traits is increasing in all dairy cattle populations over the last decade. Beside udder and fertility problems claw and foot disorders are main involuntary culling reasons. Linear description of feet and leg traits in the frame of conformation scoring didn’t reduce claw and leg problems as expected. Therefore new ways of data recording should be establish...

AIM Bovine mastitis and lameness are the most common production diseases affecting dairy farms worldwide resulting in huge economic impact and impaired animal welfare. The objective of this field study was to investigate the association of infectious and non-infectious claw disorders with the occurrence of subclinical intramammary infections (IMIs) diagnosed by California mastitis test (CMT) in...

Risk of culling consequent to the main health disorders occurring in the current production systems are reviewed. Survival analysis models including health disorders as time-dependent variables are deemed to be the most appropriate to assess their effects because they allow a better description of the exact follow-up of disease history. Farmers preferentially consider health events in the curre...

Susceptibility to mastitis is in part determined by genetics. Opportunities exist for genetic improvement of resistance to mastitis but currently available means for genetic selection are limited and focus mainly on EBV for SCC and, in countries with health recording, on EBV for clinical mastitis. Further opportunities exist to incorporate available EBV for udder conformation and milking speed ...

The objective of this study was to determine the frequency and degree discomfort in dairy cows risk factors associated by taking into account six animal welfare indicators included Welfare Quality® Protocol (WQ®): lying time, outside area, collision cleanliness assessed on three body areas: udder, hindquarters hind limbs. These were carried out 1,200 belonging 100 farms province Algiers, which ...

New tools are needed to detect chronic sub-clinical mastitis, especially in automatic milking systems. Haptoglobin and serum amyloid A (SAA) are the two most sensitive bovine acute phase proteins, and their concentrations increase in milk from cows with clinical mastitis and in milk from cows with experimentally induced chronic sub-clinical Staphylococcus aureus mastitis. The aim of this study ...

In the last decades, beef cattle breeding mainly focused on improving production and reproduction traits. Nowadays, there is a growing interest to include behavior and type traits in the breeding goal. There is an interest in behavior as it is associated with human safety and workability and in type traits as they might be associated with longevity of cows. The objective of the current study wa...

Aside from the streptococci, micrococci have been the next most frequent group of organisms isolated from inflamed udders. They produce various types of disease. Some give rise to only a mild catarrh of the larger milk ducts and cystern, while others produce more or less severe parenchymatous inflammation. On the whole, the prognosis is more favorable with micrococcic infection than with that a...