changing pattern of schistosomiasis in egypt 1935--79.a village in the nile surveyed for schistosomiasis by j. a. scott in 1935 was surveyed again in 1979. the same number of people as in the 1935 survey were randomly selected for investigation by the same parasitological techniques as those used by scott. the prevalence of schistosoma mansoni infection had increased from 3.2% to 73%, whereas s. haematobium infection, which had been very common in 1935 (74%), had almost disappeared (2.2%). in the local district hospital since 1972 the percentage of ...197989343
prevalence and intensity of schistosoma haematobium and s. mansoni infection in qalyub, egypt.we report the preliminary findings of a comprehensive schistosomiasis survey in the qalyub region of the nile delta. a systematic sample of households in eight villages was studied, and 8,712 individuals submitted stool and urine specimens for parasitologic examinations. the prevalence of schistosoma mansoni infection (40.5%) was much higher than that reported previously in this area, and the prevalence of s. haematobium (27%) was much lower. the geometric mean egg output for both parasites was ...1977869100
an epidemiological study of schistosoma haematobium and s. mansoni infection in thirty-five rural egyptian villages.probability samples of individuals from 35 village communities in the rural egyptian nile valley were examined for the presence of schistosome ova by sedimentation of urine and by the mifc technique for stools. in all there were 12,933 persons selected of which 11,337 provided specimens for examination from a total population of 66,768 persons divided among three governorates: 37% in north central delta, 31% in upper-middle egypt and 32% in the upper egypt. after controlling the differences attr ...19817342382
biological and biochemical comparative studies on schistosoma mansoni from two localities in egypt where s. haematobium is endemic.the changing pattern of schistosoma mansoni and s. haematobium distribution in egypt is generally attributed to ecological changes caused by the construction of the aswan high dam. although s. mansoni was previously restricted to lower egypt, it is now found at certain foci in upper egypt. in areas of lower egypt where s. mansoni and s. haematobium are sympatric, s. mansoni eggs are shed almost exclusively in the stools of patients, whereas in upper egypt they are more frequently shed in the uri ...19958745939
is schistosoma mansoni replacing schistosoma haematobium in the fayoum?schistosoma mansoni is progressively replacing s. haematobium along the nile river in egypt. this change has occurred in the past 15-20 years following construction of the aswan high dam in the 1960s. the cause is a shift in relative abundance of the snail vectors biomphalaria alexandrina and bulinus truncatus. biomphalaria is increasing while the latter has disappeared from a village in the fayoum where formerly only schistosomiasis haematobia was endemic. a cross-sectional household survey in ...19938279637
effect of the aswan high dam on prevalence of schistosomiasis in increase in the prevalence of schistomiasis in egypt, as a result of the aswan high dam, has for long time been predicted because of reclamation of land and conversion of annual flooding (basin irrigation) into perennial irrigation in upper egypt. two aspects, neglected in the predictions, have been investigated in the present study, and these are: the ecological changes, relevant to the transmission of the disease, in the nile itself, and those in irrigation canals and drains in areas which ...19751216315
relationship between pure schistosoma haematobium infection in upper egypt and irrigation systems. part ii: host characteristics. the general prevalence of schistosoma haematobium, age and sex distribution.the epidemiology of bilharziasis was studied in four villages in assiut governorate. these villages were almost similar with respect to their socioeconomic conditions, modes of living, availability and date of introduction of medical services. the first village, gezirat el-maabda, has a basin system of irrigation. the other three villages had shifted to the perennial system of irrigation for three years in nazza karrar, 26 years in el-ghorayeb and 95 years in garf sarhan and were similar with re ...19751230347
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