Bulinus truncatus

About: Bulinus truncatus is a research topic. Over the lifetime, 414 publications have been published within this topic receiving 5640 citations.

Distribution of intermediate mollusc hosts in human schistosomiasis in the Office of Niger (Mali).II. Role of different habitats in the transmission

Abstract: To determine the role of habitats in the schistosomiasis transmission all the year, a study on snail hosts distribution was carried out within various parts in the irrigated system of the "Office du Niger". Bulinus truncatus and Biomphalaria pfeifferi were the only snail hosts recorded. Densities were low and 85% (46/54) of breeding sites contained less than 50 snails collected per man/hour. Primary and secondary canals play the most important role in disease transmission because of the stability of these habitats, the pollution of human water contact by remnants of food and wastes which favourised the snail growth and infestation. Prevalences were 23.3% (46/197) in Bulinus truncatus and 2.5% (6/243) in Biomphalaria pfeifferi. The cercariae shedding was permanent, but the infection varied significantly according to the snail species, the period and to the area.

[Bulinus truncatus, Planorbarius metidjensis and endemic bilharziosis in the southwestern Morocco].

Abstract: Since Planorbarius metidjensis was recently found to be an experimental intermediate host of Schistosoma haematobium in the South-West of Morocco, a study on planorbid and B. truncatus was carried out from 1997 to 2005. Eleven planorbid populations were identified in 1997 in the Agadir province, all living at high altitude (from 340 to 1380 m). In contrast, most of the seven bulinid populations inhabited low-lying zones. Three annual generations of P. metidjensis (April-July June-September, and August-March) were noted in two populations (living in perennial bodies of water) in Imouzzer so that juvenile snails were present throughout the year. The dissection of numerous snails collected from these 18 populations between 1999 and 2005 revealed the absence of natural infections with S. haematobium. As most cases of human bilharziosis detected in the Agadir region between 1993 and 1997 are located in highlands, P. metidjensis might be the principal intermediate host of S. haematobium in districts at 500 m above sea level.