Laboratory and quasi-field studies on interspecific competition between<i>Bulinus globosus</i>and<i>B. tropicus</i>(Gastropoda: Planorbidae)

Ndlela, B; Madsen, Henry

doi:10.2989/16085910109503719

Cited by 4 publications

(6 citation statements)

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“…The non-host snails may act as biologic control agents for the intermediate hosts by either competing for space and food or by acting as predators. 15 Marisa cornuarietis has been reported to act as a predator for all stages of Bulinus and Biomphalaria, and has been used as part of schistosomiasis control measures in Puerto Rico and other Caribbean islands. 36 In addition, some of the non-host snails may protect the intermediate host snails from infection with schistosome miracidia by acting as decoys.…”

Section: Discussionmentioning

confidence: 99%

“…Because snail populations are highly variable temporally, it was also essential to consider both seasonal and spatial trends for factors associated with the presence and density of S. haematobium intermediate-host species, and the snail species that compete with them. 15 This report describes the distribution and seasonal fluctuation of the intermediate host snail (B. nasutus) and other snails sharing the same aquatic habitats in Msambweni area. (Similar snail studies were performed some 20 years ago in this same area, 14 allowing comparison with the present study.)…”

Section: Introductionmentioning

confidence: 99%

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Distribution Patterns and Cercarial Shedding of Bulinus Nasutus and Other Snails in the Msambweni Area, Coast Province, Kenya

Kariuki

Clennon²,

Brady³

et al. 2004

The American Journal of Tropical Medicine and Hygiene

103

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In the Msambweni area of the Kwale District in Kenya, an area endemic for Schistosoma haematobium, potential intermediate-host snails were systematically surveyed in water bodies associated with human contact that were previously surveyed in the 1980s. Bulinus (africanus) nasutus, which accounted for 67% of the snails collected, was the only snail shedding S. haematobium cercariae. Lanistes purpureus was the second most common snail (25%); lower numbers of Bulinus forskalii and Melanoides tuberculata were also recovered. Infection with non-S. haematobium trematodes was found among all snail species. Rainfall was significantly associated with the temporal distribution of all snail species: high numbers of Bulinus nasutus developed after extensive rainfall, followed, in turn, by increased S. haematobium shedding. Spatial distribution of snails was significantly clustered over a range of up to 1 km, with peak clustering observed at a distance of 400 meters. Water lily (Nymphaea spp.) and several aquatic grass species appeared necessary for local colonization by B. nasutus or L. purpureus.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution Patterns and Cercarial Shedding of Bulinus Nasutus and Other Snails in the Msambweni Area, Coast Province, Kenya

Kariuki

Clennon²,

Brady³

et al. 2004

The American Journal of Tropical Medicine and Hygiene

103

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“…Laboratory and quasifield studies showed a significant reduction in reproductivity of B. globosus in the presence of B. tropicus and evidence of B. tropicus preying on B. globosus eggs [42]. However, further enclosure studies [43] did not show any significant effect of B. tropicus on B. globosus population density suggesting the competition between the two snail species was not important control of schistosomiasis.…”

Section: Jica Funded School Screening Treatment and Education Promentioning

confidence: 99%

“…Motivated by the observation that B. globosus (intermediate host snail for schistosomiasis) and B. tropicus (non-intermediate host snail for schistosomiasis) do not share the same niche although they share similar habitats, studies aimed at investing the potential of using B. tropicus as a competitor snail of B. globosus with the ultimate goal of controlling schistosomiasis were conducted [ 42 , 43 ]. Laboratory and quasifield studies showed a significant reduction in reproductivity of B. globosus in the presence of B. tropicus and evidence of B. tropicus preying on B. globosus eggs [ 42 ]. However, further enclosure studies [ 43 ] did not show any significant effect of B. tropicus on B. globosus population density suggesting the competition between the two snail species was not important control of schistosomiasis.…”

Section: Jica Funded School Screening Treatment and Education Promentioning

confidence: 99%

Enhancing Schistosomiasis Control Strategy for Zimbabwe: Building on Past Experiences

Chimbari

2012

Journal of Parasitology Research

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Schistosoma haematobium and Schistosoma mansoni are prevalent in Zimbabwe to levels that make schistosomiasis a public health problem. Following three national surveys to map the disease prevalence, a national policy on control of schistosomiasis and soil transmitted helminths is being developed. This paper reviews the experiences that Zimbabwe has in the area of schistosomiasis control with a view to influence policy. A case study approach to highlight key experiences and outcomes was adopted. The benefits derived from intersectoral collaboration that led to the development of a model irrigation scheme that incorporates schistosomiasis control measures are highlighted. Similarly, the benefits of using plant molluscicides and fish and duck biological agents (Sargochromis codringtonii and Cairina moschata) are highlighted. Emphasis was also placed on the importance of utilizing locally developed water and sanitation technologies and the critical human resource base in the area of schistosomiasis developed over years. After synthesis of the case studies presented, it was concluded that while there is a need to follow the WHO recommended guidelines for schistosomiasis control it is important to develop a control strategy that is informed by work already done in the country. The importance of having a policy and local guidelines for schistosomiasis control is emphasized.

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“…Studies in Zimbabwe have investigated Bulinus tropicus as a potential competitor snail for Bulinus globosus [9,10]. However, Ndlela and Madsen [11] showed that B. tropicus did not have a significant effect on the density of B. globosus, suggesting little or no competition between the two species. Perissinotto et al [12] described Tarebia granifera as a non-native invasive species with a high abundance that poses threats to indigenous gastropods species abundance and richness such as Bulinus spp.…”

Section: Introductionmentioning

confidence: 99%

Species Diversity, Distribution, and Abundance of Freshwater Snails in KwaZulu-Natal, South Africa

Nwoko

Kalinda

Manyangadze

et al. 2022

Water

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Disease distribution is correlated to the distribution of the freshwater snails which in turn is influenced by the physicochemical status of the habitats. This study aimed to evaluate freshwater snail species diversity, abundance, and distribution in KwaZulu-Natal (KZN) province, South Africa, between December 2020 to February 2021. A total of 4576 freshwater snails consisting of 8 species were collected from 127 sites in 11 districts. Tarebia granifera snails were the most abundant (n = 2201), while bivalves (n = 95) were the least abundant. The highest and least Shannon–Weiner Simpson’s diversity indices were recorded in Ugu and iLembe districts, respectively. A negative relationship was observed between rainfall, Bulinus tropicus, Lymnaea natalensis, bivalves, and Physa acuta, while temperature had a positive relationship with B. globosus, B. pfeifferi, and T. granifera. A positive relationship was observed between B. globosus and B. pfeifferi (r = 0.713, p < 0.05). Snail presence constitutes potential health and economic risks to humans and animals in contact with the waterbody. Hence, our study described the current distribution, abundance, and species diversity of freshwater snails in the KZN province with insights into the possibilities of snail-based biological control for schistosomes intermediate host snails.

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Laboratory and quasi-field studies on interspecific competition betweenBulinus globosusandB. tropicus(Gastropoda: Planorbidae)

Cited by 4 publications

References 0 publications

Distribution Patterns and Cercarial Shedding of Bulinus Nasutus and Other Snails in the Msambweni Area, Coast Province, Kenya

Distribution Patterns and Cercarial Shedding of Bulinus Nasutus and Other Snails in the Msambweni Area, Coast Province, Kenya

Enhancing Schistosomiasis Control Strategy for Zimbabwe: Building on Past Experiences

Species Diversity, Distribution, and Abundance of Freshwater Snails in KwaZulu-Natal, South Africa

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