Topic
Bulinus truncatus
About: Bulinus truncatus is a research topic. Over the lifetime, 414 publications have been published within this topic receiving 5640 citations.
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TL;DR: In this paper, observations on the infection of bulinid snails with Schistosoma mattheei are presented. But the authors do not discuss the infection with the same species of slugs.
Abstract: (1968). Observations on the infection of bulinid snails with Schistosoma mattheei. Annals of Tropical Medicine & Parasitology: Vol. 62, No. 3, pp. 382-392.
15 citations
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TL;DR: The life cycel and morphology of Echinoparyphium ralphaudyi sp.
Abstract: The life cycel and morphology of Echinoparyphium ralphaudyi sp. n. is described. Natural infections were found in Bulinus truncatus from Egypt, Ethiopia, and the Yemen Arab Republic, and later in B. forskalii and B. sericinus from Ethiopia. Sporocysts develop near the places of miracidial entry into the snail (the head-foot region, mantle edge, pseudobranch, and antennae). Rediae occur mainly in the ovotestis and in tissues anterior to the liver. The first cercariae are released 24 days postexposure. Metacercariae encyst in various freshwater snails and are localized in the pericardial sac and the posterior part of the kidney. Adult worms live in the small intestine of a variety of experimental animals: hamsters, rats, mice, chicks, ducklings, pigeons, and finches.
15 citations
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01 Jan 1993
TL;DR: In this paper, a maximum tolerable water velocity for the snail Bulinus truncatus of 0.23 m/s was established, corresponding to 0.13 m/sat snail height.
Abstract: Aquatic snails are the intermediate hosts of the disease schistosomiasis.
Irrigation schemes have often provided a favourable habitat for these
snails, but rapidly flowing water will carry them away.
The research established 23 stations in irrigation canals and monitored
snail numbers and water velocity at these points. A maximum tolerable
velocity for the snail Bulinus truncatus of 0.23 m/s was established,
corresponding to 0.13 m/sat snail height. Aquatic weed did not invalidate
this velocity, but the use of a single control velocity was found to be
over-simplistic. The long-term mean velocity was found to be the best
measure for snail control when velocity varied with time.
Using specially designed filter-traps, snails being carried along by the
flow were intercepted and counted. Attempts to relate these counts to
velocity revealed daily and seasonal cycles of numbers of snails detaching.
Snails in 130 syphon boxes were monitored and the number of snails compared
with water velocity. The maximum velocity tolerated here was lower than in
the canals. Turbulence theory was examined to explain the difference.
The fieldwork was largely carried out in the Tessaout Amont Irrigation
Scheme in Morocco.
Recommendations are made for the design, operation and maintenance of
irrigation schemes, if velocity is to be considered as a snail control.
15 citations
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TL;DR: Study of this snail in natural habitats in Northern Ghana has shown that the pronounced population fluctuations can be broadly related to the alternating wet and dry seasons and to any marked changes in the aquatic vegetation.
Abstract: Bulinus (B.) truncatus rohlfsi is an important snail host of Schistosoma haematobium in Ghana and probably elsewhere in West Africa. Study of this snail in natural habitats in Northern Ghana has shown that the pronounced population fluctuations can be broadly related to the alternating wet and dry seasons and to any marked changes in the aquatic vegetation. An increase in snail density and reproductive activity begins during the rainy season, reaching a peak in the dry season. The onset of the contraction phase in the snail population is often abrupt, although it may be preceded by intense oviposition; during this phase there are but a few widely scattered snails and little reproductive activity with a low level of survival, particularly of juvenile snails. The factors which favour the survival of young specimens are clearly critical in the evolution of the snail population.
The findings are related to snail population studies carried out elsewhere in Africa, and to the application as well as limitations of molluscicides in bilharziasis control programmes.
15 citations
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TL;DR: Experimental infections of Bulinus truncatus with both of the Aden strains of Schistosoma haematobium have failed to develop and transmission of urinary schistosomiasis by Bulinus beccari in the coastal plain of Aden is demonstrated and supported by laboratory experiments.
Abstract: 1. 1) The literature on schistosomiasis in South-west Arabia is briefly reviewed. 2. 2) Transmission of urinary schistosomiasis by Bulinus beccari in the coastal plain of Aden and by Bulinus reticulatus in the middle heights in Upper Aulaqi State is demonstrated and supported by laboratory experiments. 3. 3) Experimental infections of Bulinus truncatus with both of the Aden strains of Schistosoma haematobium have failed to develop.
14 citations