Snail investigations performed for 37 years (1970–2006) in the department of Haute Vienne with indication of their purpose and the number of water points investigated.
|Purpose of investigations||Stations||Number of water points investigated|
|Detection of snail habitats in 234 farms with a problem of animal fasciolosis||Grasslands and their vicinity (road ditches, ponds, streams, rivers)||7831|
|Experimental transplantations of snails in other 25 farms||Grasslands only||624|
|Mapping of snail populations in 106 municipalities in northern Haute Vienne||Mainly road ditches, ponds, streams and rivers||3606|
|Wild watercress beds at the origin of human fasciolosis cases||Small ponds, man-made basins||252|
|The Vienne river and its main tributaries||River banks||464|
|Other ponds and streams||Pond and stream banks||701|
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