The aim of the present study was to determine seroprevalance of Neospora canniunm in serum of sheep by using different serological test .rapid test and indirect ELISA in addition to study of changes in some hematology, biochemical parameters accompanied with Neospora caninum in sheep.
Study included examination of 133 blood samples in different areas of mosul city .
Results showed that prevalenceof IgG of Neosporosis by using rapid test and iELISA was (18.04% and 21.05%)respectively .
Hematology assessment show no change in Total RBC, HB, PCV ,but significant increase in MCV, MCH, MCHC.in contrast it show significant increase in Total WBC in compare with control .there is significant increase in AST,ALT,CRP,ACH . all these parameters examined on seropositive sera for rapid test and iELISA in comp aired with seronegative . in conclusion presence of Neospora caninum in sheep in mosul city in additioin both applied diagnostic method s fsat test and iELISA gives a good result for detection IgG and it effect on hematological and biochemical parameters of the infected sheep