Comparative evaluation of three methods of diagnosis of schistosoma haematobium infection

A total of 100 urine samples were examined for S. haematobium infection by filtration, centrifugation and sedimentation methods. A significantly higher proportion of S. haematobium-ova was detected by filtration method [34%] than by centrifugation [24%] and sedimentation [19%] methods, and a higher intensity of infection was detected by filtration method as well. All patients with heavy infection [>/= 50 eggs/10 ml urine] detected by filtration technique were also positive by the other methods, while only 50% and 25% of those with light infection[< 50 eggs/10 ml urine] were positive by centrifugation and sedimentation methods respectively