الفهرس 
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Abstract
Schistoson1iasis is a nlajor health probleln of world wide distribution. It is the nlost endenlic disease in Egypt. It has been shown that S is the prevalent alllong school children and fanners who are getting contact frequently with infected water of canals.
This study included 1770 children, 169} were pupils attending basic schools and 73 were COSo Of the SP 1141 (67.2% ) were 111ales and 556 (32.80/0) were fen1ales and of the COS 12 (16.40/0 ) ’vvere males and 61 (83.60/0) were felnales. The age of the studied children ranged between 6-15 years (mean 9 + 2.3).
All children were subjected to:
- Taking a history according to special questionnaires.
- Clinical exanlination.
- Urine analysis for SH by both sedimentation and nucleopore
methods.
It was found that the past history of SH was Jl10re con11non among COS _ than among SP and alnong nlales than felnales for both groups.
After trcatmcnt or 5,’11, the rate of reinfection and persistence of the disease was highcr among COS than aInong S P (25.0% versus 14.70/0).
FroJl1 the study, it was found that there is a reverse relation between the distance of nearest canals and prevalence of SH among children of basic school age.
Clinical exanlination revealed that the comlnonest
nutritional abnonnality with SRI is ariboflavinosis (41.7%) followed by pallor (20.10/0).
QI lTIeaSUres were found to be lower atTIong infected children than atTIong non infected.
Organo111egaly was detected among 7 cases, 3 ( two males and one fe111ale) at pri mary schools and 4 111ales at the preparatory school.
C0111paring the results of urine exanlil1ation. by l1ucleopore method with that of sedinlentation method revealed that both methods have alnlost equal sensitivities.
The prevalence of SI-! was found to be progressively increasing with age in both sexes with higher rates a1110ng COS than anlong SP.
SH prevalence is 10\iver among children having latrines at their hOlnes than among those have not. This t11ay be due to less pro111iscuity and better housing conditions and habits and not due to presence of a latrine perse.
All SH infected children were found to have no water supply at their h0111es. So, abundant piped water supply distribution tl1rough the endemic area undoubtedly results in diminishing the incidence of S.
Presence of television and \vashing machine at h0111e were found to have no effect on the prevalence of SHI atnong children.