Calcium homeostasis and parturient hypocalcemia: an integral feedback perspective.

The Degrees of Parturient Hypocalcemia and Its Relevance to Other Metabolic Profile Parameters in Downer Cows

At calving time, the cows were monitored and blood samples were taken from jugular vein of 38 cows with parturient paresis and 38 healthy ones. The levels of calcium, phosphorus, magnesium, sodium, potassium, chloride, glucose, triglyceride, cholesterol, albumin, globulin and A/G ratio were assessed to find the correlation between the degree of hypocalcemia and other parameters. According to ca...

Calcium chloride gel treatment of parturient dairy cows: Effect on hypocalcemia and parturient diseases

The Inf luence of Subclinical Hypocalcemia on Production and Reproduction Parameters in Israeli Dairy Herds

Gild, C. 16 INTRODUCTION Parturient paresis is a metabolic disorder occurring close to parturition especially in high producing dairy cows. The disease is characterized by a rapid decline in blood calcium (Ca) concentrations. Nearly all mature cows experience some degree of hypocalcemia during the first day after calving as the intestine and bone adapt to the Ca demands of lactation (1). In som...

Milk Fever

MILK FEVER, also called parturient paresis and parturient hypocalcemia, is an aifection of cows occurring shortly after calving. It is characterized by paralysis of the motor and sensory nervous apparatus. Despite its name, milk fever usually is not accompanied by fever. There is always, however, a marked and rapid lowering of the blood calcium, so that the name "parturient hypocalcemia," which...

Calcium Homeostasis: A Feedback Control Point of View

In the biological sciences, the mathematical approach to studying feedback mechanisms has not been common despite the abundance of such mechanisms in those systems. In this paper, we will try to analyze the calcium homoeostatic mechanism in this context. In addition to a general modeling of this mechanism, the paper will also focus on parturient paresis, a common disease associated with the ons...