Document Type : Original Article
Authors
1
Department of Clinical Sciences, Faculty of Veterinary Medicine, Islamic Azad University, Baft Branch, Baft, Iran
2
Department of Basic Sciences, Faculty of Veterinary Medicine, Ardakan University, Ardakan, Iran
3
Biology and Animal Reproduction Science Research Institute, Ardakan University, Ardakan, Iran
Abstract
The Afshari sheep, valued for their adaptability and productivity, are vital to Iran's livestock sector, especially in the Mashhad region. This study examines the effects of age on biochemical and hematological parameters in eighteen clinically healthy non-pregnant Afshari sheep divided into three age-based groups of six each: 1-2 years, 3-4 years, and over 4 years. Following thorough health assessments, blood samples were collected and analyzed for markers including total protein, albumin (Alb), globulin (Glo), aspartate transaminase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), and hematological parameters such as white blood cell (WBC), red blood cell (RBC), hemoglobin (Hb), hematocrit (HCT), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC). Results showed that total protein and albumin levels were significantly higher in the sheep aged between 1-2 years compared to older ones (p < 0.001). ALP concentrations were elevated in younger sheep, while GGT levels increased significantly in sheep older than 4 years (p < 0.001). Hematological analyses indicated that RBC counts, HCT, and Hb concentrations were also greater in the youngest group (p < 0.001). WBC was lower in the oldest group, but differential leukocyte counts for neutrophils (p = 0.910) and lymphocytes (p = 0.720) did not differ significantly across ages. These findings underline the significant impact of age on the hematobiochemical profiles of Afshari sheep, providing critical insights for health management practices. This research enhances understanding of age-related physiological changes, aiding farmers and veterinarians in optimizing strategies for the welfare and productivity of this essential livestock breed.
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