[Preliminary evaluation of morbidity due to S. haematobium and S. mansoni in the area of the future Adjarala Dam in Benin].
The aim of this study was to provide a preliminary assessment of morbidity due to schistosomiasis in the area of the future Adjarala Dam in Benin. We included 412 schoolchildren from five villages in the study. The mean age of the children was 9.4 +/- 2.3 years and the sex ratio (F/M) was 0.94. These children underwent parasitological examination. The children provided urine samples, which were examined by eye, filtered and tested for blood and protein. Stool samples were examined using Kato's technique and an ultrasound scan of the urinary tract was performed. We carried out a survey of snails at the possible transmission sites of all the villages, with a view to identifying the intermediate hosts. We detected S. mansoni and S. haematobium in the area. Urinary schistosomiasis was mesoendemic (prevalence of 19.7%) whereas schistosomiasis due to S. mansoni was hypoendemic (prevalence of 3. 9%). Ultrasound scans showed that 28% of the children had bladder lesions and that 2.5% were carriers of hydronephrosis. We compared the diagnostic performances of the various indirect indicators of morbidity. We found that a history of hematuria was the most sensitive indicator (88%) but that the sensitivity of this indicator differed significantly according to the sex of the child. Hematuria >= 1+ was the most effective indicator. Snail surveys showed that Biomphalaria pfeifferi and Bulinus globosus were present in the area.
Garba
A
A
Centre de recherche sur les méningites et les schistosomoses (CERMES), Niamey, Niger. garba@ird.ne
Kinde-Gazard
D
D
Makoutodé
M
M
Boyer
N
N
Ernould
J C
JC
Chippaux
J P
JP
Massougbodji
A
A
D000367:Age Factors; D000818:Animals; D001541:Benin; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006417:Hematuria / Q000209:etiology; D006801:Humans; D008297:Male; D012553:Schistosomiasis haematobia / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology*; D012555:Schistosomiasis mansoni / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology*; D012737:Sex Factors; D014463:Ultrasonography