| the molluscicidal properties of ambrosia maritima l. (compositae). 4. temporal and spatial distribution of biomphalaria alexandrina in egyptian village irrigation systems with reference to schistosomiasis transmission control. | data on the temporal and spatial distribution of biomphalaria alexandrina were collected throughout one year in two village irrigation systems near alexandria, egypt. snails bearing schistosoma mansoni cercariae were found from may to december but about 80% of annual transmission potential was confined from june to august. although snail infection rates were generally 0-2%, higher rates were recorded and tended to be associated with smaller number snail collections. infected snails were found in ... | 1989 | 2505371 |
| results of exposure of batches from highly susceptible and less-susceptible strains of biomphalaria alexandrina alexandrina from egypt to strains of schistosoma mansoni from cairo and alexandria. | | 1968 | 5306108 |
| immunolocalization of schistosoma mansoni and schistosoma haematobium antigens reacting with their egyptian snail vectors. | the reaction of the haemolymph and the tissue of infected intermediate hosts, biomphalaria alexandrina and bulinus truncatus to schistosoma mansoni and s. haematobium antigens were investigated using the indirect immunoperoxidase technique. a new technique, agarose cell block was used in collection of haemolymph which helped in collecting plenty of well formed cells in comparison to the ordinary one using the cytospin. collected haemolymph and prepared tissues of uninfected and infected b. alexa ... | 2007 | 18383803 |
| control of snail hosts of bilharziasis in egypt. 3. effect of the organophosphorous insecticide, dursban, on carbohydrate metabolism of the snails biomphalaria alexandria and bulinus truncatus. | the effects of the organophosphorous insecticide, dursban, on aerobic oxidation, glycolysis, glucose utilization and gluconeogenesis in snails tissues were determined. dursban had a biphasic effect on the aerobic oxidation of succinate, glutamate + malate and tmpd + ascorbate while it had only an inhibitory action on pyruvate oxidation. the compound significantly inhibited glycolysis, glucose utilization and gluconeogenesis when used at high concentrations (ten times higher than its lc50). howev ... | 1975 | 52436 |
| biomphalaria alexandrina in egypt: past, present and future. | the african species of biomphalaria appeared as a result of the relatively recent west-to-east trans-atlantic dispersal of the biomphalaria glabrata-like taxon. in egypt, biomphalaria alexandrina is the intermediate host for schistosoma mansoni. biomphalaria alexandrina originated in the area between alexandria and rosetta and has historically been confined to the nile delta. schistosoma mansoni reached egypt via infected slaves and baboons from the land of punt through migrations that occurred ... | 2013 | 23938396 |
| risk factors associated with parasitic infection among municipality solid-waste workers in an egyptian community. | solid-waste management is associated with several health hazards, particularly parasitic infection. the objective of the study was to determine the association between risk factors and the occurrence of intestinal parasitic infections (potentially pathogenic) among municipal waste collectors in alexandria, egypt. a cross-sectional survey was conducted in the main municipality company in alexandria. a total of 346 municipality solid-waste workers (mswws) was interviewed using an in-depth question ... | 2016 | 26606452 |
| biomphalaria species in alexandria water channels. | of the several species of biomphalaria snails worldwide that serve as the intermediate host for schistosoma mansoni, biomphalaria alexandrina is a species that is indigenous to egypt. recently, there has been much debate concerning the presence of biomphalaria glabrata and the hybrid of the species with biomphalaria alexandrina. due to this debate, the absence of a clear explanation for the presence of b. glabrata in egyptian water channels and the probability that they may be reintroduced, we c ... | 2011 | 21458594 |
| current status of s. mansoni infection in el-prince village, alexandria governorate. | the present work was implemented to determine the current status of schistosoma mansoni infection in "el-prince" village, near alexandria, which was studied before as a control village between 1985 and 1990. stool examination was performed on 571 of the inhabitants by kato thick smear technique and intensity of infection was determined. prevalence was found to be 15.4% with a percentage decrease of 53% from the 1990 survey. the geometric mean egg count (gmec) ranged from 19.05 eggs/gram of stool ... | 2002 | 17216977 |
| 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 |
| morbidity of schistosomiasis mansoni in rural alexandria, egypt. | a parasitological survey of stool and urine of 2577 from 3281 individuals living in abis villages, alexandria was undertaken in 1998 in order to investigate the prevalence of schistosomiasis in this area and risk factors for hepatic morbidity. a random sample of 1082 individuals was interviewed using a questionnaire regarding risk factors for liver morbidity. all interviewed adults (total: 728) were clinically examined for evidence of organomegally (hepatomegally and/or splenomegally). individua ... | 2003 | 14708847 |
| diagnostic significance of schistosoma mansoni proteins sm31 and sm32 in human schistosomiasis in an endemic area in egypt. | we performed a series of elisas to evaluate the diagnostic significance of two schistosoma mansoni proteins, sm31 (cysteine proteinase, cathepsin b) and sm32 (asparaginyl endopeptidase). our study populations were chosen from two villages in an endemic area close to alexandria. using fusion proteins ms2-sm31 and ms2-sm32 as antigens, 70% and 78.9%, respectively, of patient sera from 134 parasitologically confirmed cases reacted positively. the percentage of seropositivity increased to 84.5% when ... | 1998 | 9754667 |
| infection of laboratory bred biomphalaria alexandrina from giza and alexandria governorates with schistosoma mansoni from giza in relation to snail size and number of penetrated miracidia. | snail size and the number of schistosoma mansoni miracidia penetrated are two important factors among others that might influence biomphalaria alexandrina infection with s. mansoni. groups of 16 snails of fixed age but of different size class (2-4 mm), (4-6 mm), (6-8 mm), (8-10 mm) and (10-12 mm) from three successive generations of positive and negative laboratory bred b. alexandrina from giza and alexandria governorates were each exposed to five s. mansoni miracidia (tbri from giza) under ligh ... | 1997 | 9425819 |
| susceptibility of three successive snail generations from positive and negative laboratory bred biomphalaria alexandrina from different localities in egypt to infection with schistosoma mansoni from giza. | susceptibility of snail vectors to schistosome infection varies between geographical areas, populations in the same area and among individuals in the same population. it is also affected by biological factors of which are snail size (age), number and age of miracidia exposed to water, temperature, illumination and darkness. our preview studies indicated that snails 4-6 mm in diameter exposed to 5 freshly hatched miracidia under light and in water at 25 degrees c are optimum conditions for infect ... | 1997 | 9257970 |
| susceptibility of the small biomphalaria alexandrina alexandrina from the uar and the sudan to infection with a strain of schistosoma mansoni from tanzania. | a series of laboratory experiments was carried out to determine the susceptibility of biomphalaria alexandrina alexandrina, the snail vector of schistosomiasis in the united arab republic and the sudan, to a strain of schistosoma mansoni from mwanza, tanzania. the objective of the investigation was to determine whether or not b. alexandrina is refractory or partially refractory to infection with strains of s. mansoni other than the egyptian strain.in one series of 5 exposures, snails from a colo ... | 1970 | 5314014 |
| control of snail hosts of bilharziasis in egypt. 2. effect of triphenyltin hydroxide (du-ter) on carbohydrate metabolism of the snails biomphalaria alexandria and bulinus tuncatus. | previous work has shown that the aerobic oxidation of certain intermediates of krebs cycle by the snail b. alexandrina and b. truncatusis inhibited by tpt. this paper reports data on the effect of tpt on glucose utilization, glycolysis, glycogen content, and glucone ogenesis in snail tissue preparations. the compounds at its lc50 inhibited gluconeogenesis, stimulated glycolysis and markedly reduced the glycogen content and glucose utilization in both snails. however, the effects were more pronou ... | 1975 | 1181172 |