Table 1.
Frequency of snails examined and parasitized in each size interval
| Size* | Frequency | P | MI | MA |
|---|---|---|---|---|
| 1 | 56 | 0 | 0 | 0 |
| 2 | 143 | 19 | 17 | 33 |
| 3 | 126 | 24 | 41 | 10 |
| 4 | 48 | 62 | 42 | 26 |
| Total | 373 |

Fig. 1.
Strongyluris sp. L3. a Complete worm (SEM). b Anterior extremity (LM) showing faringe and faringeal bulb (see arrow). c Anterior extremity, apical view (SEM). d Posterior extremity (SEM)