| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |