Open Access
Table 4
Prevalence of natural infection with Fasciola hepatica in Galba truncatula collected from the department of Haute-Vienne between 1970 and 2006 in relation to different categories for the mean altitude, mean annual rainfall and mean annual temperature. CI, confidence interval.
| Parameter and categories | Number of infected snails | Number of snails collected | Prevalence (%) of natural infection [95% CI] |
|---|---|---|---|
| Mean altitude | |||
| < 300 m | 1933 | 42,216 | 4.58 [4.38;4.78] |
| [300;400 m[ | 1883 | 47,501 | 3.96 [3.79;4.14] |
| [400;500 m[ | 317 | 16,620 | 1.91 [1.70;2.13] |
| ≥500 m | 32 | 2144 | 1.49 [1.02;2.10] |
| Total | 4165 | 108,481 | 3.84 [3.72;3.96] |
| Mean annual rainfall | |||
| < 900 mm | 363 | 7679 | 4.73 [4.26;5.23] |
| [900;1000 mm[ | 1671 | 36,605 | 4.33 [4.12;4.54] |
| [1000;1100 mm[ | 1474 | 39,570 | 3.73 [3.54;3.92] |
| [1100;1200 mm[ | 602 | 19,983 | 3.01 [2.77;3.26] |
| ≥ 1200 mm | 55 | 2644 | 2.08 [1.57;2.70] |
| Total | 4165 | 108,481 | 3.84 [3.72;3.96] |
| Mean annual temperature | |||
| < 9.5 °C | 1 | 100 | 1.00 [0.03;5.45] |
| [9.5;10 °C[ | 100 | 5255 | 1.90 [1.55;2.31] |
| [10;10.5 °C[ | 119 | 4235 | 2.81 [2.33;3.35] |
| [10.5;11 °C[ | 1509 | 41,437 | 3.64 [3.46;3.83] |
| ≥ 11 °C | 2436 | 57,454 | 4.24 [4.07;4.41] |
| Total | 4165 | 108,481 | 3.84 [3.72;3.96] |
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