RESUMEN
The activity and electrophoretic mobility or leucine aminopeptidase [LAP] were assessed in the sera of 100 patients with different clinical stages of Schistosoma hacmatobium infestation as well as in 20 sample of ascctic fluids obtained from patients with bilharzial hepatosplenomegaly associated with ascites matched with 20 healthy adult males sample as control. Generally LAP activity was significantly higher in all patients. The activity of serum LAP showed a progressive rise with the advance in the clinical condition. The highest level was encountered in the sera of patients with bladder carcinoma and liver metastasis, leucine aminopeptidase was considerably found in the ascetic fluid. The ratio of the activity or LAP in the ascetic fluid to its activity in the serum of the same patients was 1:4.5 where the enzyme diffuses from the blood to the ascetic fluid. The enzyme detected by electrophoresis, in serum or ascetic fluid LAP migrated as a single component in the alpha1 -globulin faction. The results are discussed and compared with those in the literature