Resumo
Background: Production diseases, such as those associated with improper nutrition or management are common in transitional high-yielding dairy cows. The diseases listed in this include: the fat liver syndrome, ketosis, oxidative stress, laminitis, mastitis, milk fever, retained placenta, metritis and infertility. The diseases occur mainly around calving. They are all interrelated and form the so-called periparturient disease complex. The term transition is to underscore the important physiological, metabolic, nutritional and endocrine changes occurring in this time frame. Diagnosing liver lipidosis and susceptibility of ketosis in dairy cows may include liver biopsy or ecography, but a less invasive and more economical analytical method may be the measurement of blood biochemical metabolites. The objective of the present study was to determine a relationship among blood indicators of hepatic function and lipid content in the liver during transitional period in high-yielding dairy cows. Materials, Methods & Results: Late pregnant and calved cows (n = 40) were selected from a Holstein dairy herd and allocated to four groups: a late pregnant cows (n = 10) from day 15 to day 5 before calving; late pregnant cows (n = 10) from day 4 to day 1 before calving; clinically puerperal healthy cows (n = 10) and clinically ketotic puerperal cows (n = 10). Liver and blood samples were take
Background: Production diseases, such as those associated with improper nutrition or management are common in transitional high-yielding dairy cows. The diseases listed in this include: the fat liver syndrome, ketosis, oxidative stress, laminitis, mastitis, milk fever, retained placenta, metritis and infertility. The diseases occur mainly around calving. They are all interrelated and form the so-called periparturient disease complex. The term transition is to underscore the important physiological, metabolic, nutritional and endocrine changes occurring in this time frame. Diagnosing liver lipidosis and susceptibility of ketosis in dairy cows may include liver biopsy or ecography, but a less invasive and more economical analytical method may be the measurement of blood biochemical metabolites. The objective of the present study was to determine a relationship among blood indicators of hepatic function and lipid content in the liver during transitional period in high-yielding dairy cows. Materials, Methods & Results: Late pregnant and calved cows (n = 40) were selected from a Holstein dairy herd and allocated to four groups: a late pregnant cows (n = 10) from day 15 to day 5 before calving; late pregnant cows (n = 10) from day 4 to day 1 before calving; clinically puerperal healthy cows (n = 10) and clinically ketotic puerperal cows (n = 10). Liver and blood samples were take
Resumo
Background: Production diseases, such as those associated with improper nutrition or management are common in transitional high-yielding dairy cows. The diseases listed in this include: the fat liver syndrome, ketosis, oxidative stress, laminitis, mastitis, milk fever, retained placenta, metritis and infertility. The diseases occur mainly around calving. They are all interrelated and form the so-called periparturient disease complex. The term transition is to underscore the important physiological, metabolic, nutritional and endocrine changes occurring in this time frame. Diagnosing liver lipidosis and susceptibility of ketosis in dairy cows may include liver biopsy or ecography, but a less invasive and more economical analytical method may be the measurement of blood biochemical metabolites. The objective of the present study was to determine a relationship among blood indicators of hepatic function and lipid content in the liver during transitional period in high-yielding dairy cows. Materials, Methods & Results: Late pregnant and calved cows (n = 40) were selected from a Holstein dairy herd and allocated to four groups: a late pregnant cows (n = 10) from day 15 to day 5 before calving; late pregnant cows (n = 10) from day 4 to day 1 before calving; clinically puerperal healthy cows (n = 10) and clinically ketotic puerperal cows (n = 10). Liver and blood samples were take
Background: Production diseases, such as those associated with improper nutrition or management are common in transitional high-yielding dairy cows. The diseases listed in this include: the fat liver syndrome, ketosis, oxidative stress, laminitis, mastitis, milk fever, retained placenta, metritis and infertility. The diseases occur mainly around calving. They are all interrelated and form the so-called periparturient disease complex. The term transition is to underscore the important physiological, metabolic, nutritional and endocrine changes occurring in this time frame. Diagnosing liver lipidosis and susceptibility of ketosis in dairy cows may include liver biopsy or ecography, but a less invasive and more economical analytical method may be the measurement of blood biochemical metabolites. The objective of the present study was to determine a relationship among blood indicators of hepatic function and lipid content in the liver during transitional period in high-yielding dairy cows. Materials, Methods & Results: Late pregnant and calved cows (n = 40) were selected from a Holstein dairy herd and allocated to four groups: a late pregnant cows (n = 10) from day 15 to day 5 before calving; late pregnant cows (n = 10) from day 4 to day 1 before calving; clinically puerperal healthy cows (n = 10) and clinically ketotic puerperal cows (n = 10). Liver and blood samples were take