Schistosomiasis

 

Current estimated total number of individuals with morbidity and mortality due to Schistosomiasis Haematobium and S. Mansoni infection in Sub-Saharan Africaa


Schistosome species Estimated morbidity and
mortality (millions)b

S. haematobium
     At risk of infection 436
     Infected 112
Haematuria during previous 2 weeks 71 (52-89)
Dysuria during previous 2 weeks 32 (17-55)
Minor bladder morbidity (detected by ultrasound) 76 (67-92)
Major bladder morbidity (detected by ultrasound) 24 (15-31)
Moderate hydronephrosis 9.6
Major hydronephrosis 9.6
Non-functioning kidney [1.7]
Non-functioning kidney (deaths/year) [0.15]
Bladder cancer (deaths/year)  
    Males [0.011]
    Females [0.0023]

S. mansoni
     At risk of infection 393
     Infected 54
Diarrhoea during previous 2 weeks 0.78 (0.0-7.8)
Blood in stool during previous 2 weeks 4.4 (3.0-8.3)
Hepatomegaly (mid-sternal line) 8.5
Splenomegaly [6.3]
Ascites [0.29]
Haematemesis (ever) [0.93]
Haematemesis (deaths/year) [0.13]

aSource reference 5 and MJ. Vander Werf & SJ. De Vlas (personal communication).
b90% confidence interval in parentheses.