بررسي ميزان شيوع كتوز تحت باليني در گاوداري هاي اطراف تهران

Survey of subclinical ketosis prevelance in dairy herds of Tehran suburb

Most periparturient abnormalities has a metabolic elements as component of the sufficient cause of clinical diseases. Negative energy balance, fat mobilization and subsequent elevations in ketone body concentrations play a contributing role in the expression of fatty liver syndrome, clinical ketosis, and abomasal displacement. This study was performed in order to determine the prevalence of subclinical ketosis and evaluate the clinical accuracy of Keto test in subclinical diagnosis. 250 blood and milk samples were collected from 4-3 wks postpartum catties. The concentration of BHBA, NEFA, glucose and the activities of AIT and AST were determined. Keto test is a semi-quantitative test and interpreted by kit procedure. The results of this study showed that there is no correlation between the concentration of postpartum NEFA and BHBA. 6/21 % of cows with subclinical ketosis if values>1200 micromole /1 is defined as the cut off point. The specificity and sensitivity of keto test were 80 and 82 % respectively. The true prevalence was 74/17%. there was a significant decreased level of glucose in ketotic cows. The activitity of Alt and AST werenʹt different in ketotic and non ketotic cows. Vet J.ofIslamic. Azad. Univ., Garmsar Branch. 4,3:99-104,2008.