Shade as a means of ecological control of <i>Biomphalaria pfeifferi</i>

Loreau, Michel; Baluku, B

doi:10.1080/00034983.1991.11812590

Cited by 11 publications

(6 citation statements)

References 5 publications

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“…In covered siphon boxes, the effect of darkness on B. truncatus density and egg mass density was pronounced and lasted until the end of the post‐intervention monitoring. A similar result had been reported for a population of Biomphalaria pfeifferi that was eliminated from a canal within 6 weeks after artificial shade was introduced, and recovered to the same density as in other zones within 8 weeks after removal of the artificial cover ( Loreau & Baluku 1991). B. truncatus kept in continuous darkness under laboratory conditions showed a reduction in egg laying ( El‐Emam & Madsen 1982).…”

Section: Discussionsupporting

confidence: 83%

Evaluation of environmental methods to control snails in an irrigation system in Central Morocco

Laamrani

Khallaayoune

Boelee

et al. 2000

Tropical Med Int Health

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SummaryThe Moroccan Ministry of Public Health has launched a programme to eliminate schistosomiasis. One of the components in this process is the control of Bulinus truncatus, the intermediate host snail of Schistosoma haematobium.We evaluated three environmentally safe measures to control B. truncatus in siphon boxes, the main breeding sites for these snails in theTessaout Amont irrigation system.The first method involved covering the siphon boxes to exclude light and reduce algal growth, the second consisted of increasing the frequency of emptying and cleaning the siphon boxes, and the third method increased water velocity to hinder the establishment of the intermediate hosts.The results showed that covering had a pronounced effect on snail and egg mass density, was accepted by the local community and prevented water contact. Cleaning the siphons three times during the irrigation season led to a reduction in snail density although it was not statistically significant and recolonization was rapid. Increasing water velocity by reducing the dimensions of siphon boxes delayed recolonization, but such a control measure can be applied only in specific situations where it does not pose hydraulic problems.The three interventions were selectively effective against B. truncatus, whereas other snails such as Physa acuta and Lymnaea peregra were hardly affected. Covering, the most promising control measure, could be useful in the Moroccan schistosomiasis eradication programme. However, further investigations are needed to assess its impact on water quality.

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Section: Discussionsupporting

confidence: 83%

Evaluation of environmental methods to control snails in an irrigation system in Central Morocco

Laamrani

Khallaayoune

Boelee

et al. 2000

Tropical Med Int Health

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“…Shade has recently been considered as a means of ecological control of B. pfeifferi (Loreau & Baluku 1991), but this possibility could not be confirmed, since B. pfeifferi occurred in site E, where as much as 80% of the area was shaded.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Chemical and Physical-morphological Factors as Potential Determinants of Biomphalaria pfeifferi (Krauss, 1848) Distribution

Utzinger¹,

Mayombana²,

Mez³

et al. 1997

Mem. Inst. Oswaldo Cruz

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“…For instance, snails are attracted to lettuce homogenates (specifically, the amino acids glutamate and proline [70]) and wheat germ cereal [71] which could be used to bait traps. Snails can be repelled by molluscicides [71], artificial shade [72], and topical lipid formulations of N,N-Diethyl-meta-toluamide (DEET) applied to exposed skin [73].…”

Section: Looking Forwardmentioning

confidence: 99%

To Reduce the Global Burden of Human Schistosomiasis, Use ‘Old Fashioned’ Snail Control

Sokolow

Wood

Jones

et al. 2018

Trends in Parasitology

101

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Control strategies to reduce human schistosomiasis have evolved from 'snail picking' campaigns, a century ago, to modern wide-scale human treatment campaigns, or preventive chemotherapy. Unfortunately, despite the rise in preventive chemotherapy campaigns, just as many people suffer from schistosomiasis today as they did 50 years ago. Snail control can complement preventive chemotherapy by reducing the risk of transmission from snails to humans. Here, we present ideas for modernizing and scaling up snail control, including spatiotemporal targeting, environmental diagnostics, better molluscicides, new technologies (e.g., gene drive), and 'outside the box' strategies such as natural enemies, traps, and repellants. We conclude that, to achieve the World Health Assembly's stated goal to eliminate schistosomiasis, it is time to give snail control another look.

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Shade as a means of ecological control of Biomphalaria pfeifferi

Cited by 11 publications

References 5 publications

Evaluation of environmental methods to control snails in an irrigation system in Central Morocco

Evaluation of environmental methods to control snails in an irrigation system in Central Morocco

Evaluation of Chemical and Physical-morphological Factors as Potential Determinants of Biomphalaria pfeifferi (Krauss, 1848) Distribution

To Reduce the Global Burden of Human Schistosomiasis, Use ‘Old Fashioned’ Snail Control

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