Hemato-Biochemical and Histopathological Changes Caused by Coccidiosis in broilers

Abstract

The aim of present work is to   determine the  Hematological, biochemical and histopathological alterations caused by coccidiosis in broiler chickens from an outbreak of bloody coccidiosis in a flock. The study was conducted on Al bahrani  field for  commercial broiler  in Al Najaf province-Iraq.

Blood samples were collected from jugular vein into EDTA tubes for hematological value and plain tube for biochemical value during October 2017 . Result showed that the  Anemia caused by the coccidian  was characterized by a decreased number of red blood cells (RBC) and decreased packed cell volume (PCV). Differential leukocyte counts revealed to increase in  monocytes, lymphocytes, heterophil and eosinophil. Also, Serum biochemical analysis showed decreases in alanine aminotransferase (ALT) and aspartate aminotransferase (AST), and a marked increase in alkaline phosphatase (ALP) activities. On the other hand, Histopathological examinations of the affected caeca also demonstrated excessive tissue damage, hemorrhage, the crypt cells were highly invaded with the developmental stages of E. tenella schizonts and gametocytes that their morphology is practically missing. In conclusions  the present study revealed changes in the hematology, blood chemistry and histopathology of broilers caused by E. tenella and E.brunetti.