| 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 ... | 1979 | 89343 |
| 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 ... | 1977 | 869100 |
| effect of the aswan high dam on prevalence of schistosomiasis in egypt. | an 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 ... | 1975 | 1216315 |
| 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 ... | 1981 | 7342382 |
| 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 ... | 1993 | 8279637 |
| 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 ... | 1995 | 8745939 |
| a molecular survey of biomphalaria in egypt: is b. glabrata present? | two species of biomphalaria are reported from egypt, the indigenous biomphalaria alexandrina and biomphalaria glabrata, the latter believed to be introduced during the past few decades. both are known to be excellent hosts of schistosoma mansoni, the human-infecting blood fluke common in egypt. given the concerns regarding the spread of the exotic b. glabrata, this study was carried out to get a more current picture of the status of biomphalaria in egypt. snail collections were undertaken during ... | 2005 | 16014848 |