G. R. Mohammadi
Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
[ 1 ] - Reasons for culling of Holstein dairy cows in Neishaboor area in northeastern Iran
This study was designed to determine the culling rates of 23 Holstein dairy herds (with an average size of180 cows per herd) in Neyshabur area in northeastern Iran over a period of three years from 2001 to 2003.The average annual culling rate was 13.1%, (98.5% involuntary and 1.5% voluntary). Of the total disposals(1612 cows), 53.48% were culled by the end of five years of age. Poor fertility w...
[ 2 ] - Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran
The purpose of this study was to determine the prevalence of bovine leukemia virus (BLV) in Khorasan Razavi and Khorasan Shomali provinces which are the main provinces located in the northeast of Iran. Total number of 429 blood samples were collected from industrial dairy herds. The samples were categorized based on province, age (2-3, 4-6, and 7-10 years old), calving (≤ 2, 3-5, and > 5) and h...
[ 3 ] - وضعیت استرس اکسیداتیو و برخی عناصر کمیاب، شاخصهای هماتولوژیکی و بیوشیمیایی سرم در گاوهای شیری دچار جابجایی شیردان به چپ
جابجایی شیردان به چپ (left displacement of the abomasum; LDA) یکی از مهم‌ترین اختلالات ناشی از تولید است. جهت مقایسه وضعیت برخی شاخصهای هماتولوژیکی و بیوشیمیایی سرم، عناصر کمیاب و استرس اکسیداتیو در گاوهای دچار LDA با گاوهای سالم، نمونه خون از 30 رأس گاو مبتلا به LDA و 30 رأس گاو غیرمبتلا در ابتدای شیرواری اخذ شد. پارامترهای هماتولوژیکی، پروتئین تام، فیبرینوژن، کلسیم، منیزیم، بیلیروبین، اسید...
نویسندگان همکار