ABSTRACT
Results of blood analysis carried out in 12 groups of cattle mostly infected with infectious disease, shows significance of plasma fibrinogen determination in diagnosis of infectious disease in cattle. Doing T test for comparing blood parameters of infected cattle with those of apparently healthy ones, revealed significant differences in the following parameters: 1- Plasma fibrinogen [p < 0.001]. 2- Total white blood cells [0. 02 < p < 0.05]. 3- Segmented neutrophils [p < 0.001]. 4- Band neutrophils [0.02 < p < 0.05]. Test of analysis of variance [ANOVA] on the results of the blood parameters of infected and apparently healthy cattle showed significant differences in the following parameters: 1- Total plasma protein [p< 0.001]. 2- Plasma fibrinogen [p< 0.001]. 3- Plasma protein/fibrinogen [PP/F] ratio [p< 0.001]. 4- Total white blood cells [p< 0.001]. 5- Segmented neutrophils [p<0.001]. 6- Band neutrophils [p<0.001]. According to the changes of plasma fibrinogen and white blood cells, the animals were grouped into four categories: 1- Plasma fibrinogen, total WBC, and neutrophils were, normal. 2- Plasma fibrinogen was within the normal range but, total WBC and neutrophils were increased. 3- Plasma fibrinogen was increased but, total WBC and neutrophils were within the normal range. 4- Plasma fibrinogen, total WBC, and neutrophils were increased. The significance of plasma fibrinogen determination especially in the third and fourth groups were confirmed