Clinical characteristics and response to therapy in Egyptian children infected with Schistosoma haematobium.

Forty-one Egyptian students with infections due to Schistosoma haematobium, who were selected by results of a urine screening examination, were evaluated for morbidity and response to chemotherapy. Symptoms associated with infection were hematuria, dysuria, and swimmer's itch. A positive correlation existed between the intensity of infection and frequency of exposure to water. Laboratory abnormalities included eosinophilia (41), anemia (9), hematuria (38), pyuria (33), and proteinuria (8). Three of 26 subjects had abnormalities intravenous pyelograms: hydroureter, bladder polyp , and bladder calcification. The bladder polyp was noted also by sonography. Cure rates were 66.7% in 18 subjects treated with two 10-mg/kg doses of trichlorfon and were 89.5% in 19 subjects given three doses. Those not cured had an average reduction in ova excretion of 96%. Follow-up at 12 months of 33 subjects showed that nine had S. haematobium ova in urine, although 75% admitted to exposure to canal or irrigation water in the interim.