Fig. 1
Map of sample collection sites of Hydrobioides nassa from six different catchment systems in north, west, and central regions of Thailand.
Table 1
Geographical localities of Hydrobioides nassa collection from north, west, and central of Thailand.
| Name* | Date of collection | Latitude/ Longitude | Catchment | Region |
|---|---|---|---|---|
| CRI_S10 | 25-Nov-19 | 19.787771/99.746522 | Kok | North |
| CRI_S12 | 5-Nov-19 | 19.475219/99.752946 | Mekong | North |
| PRE_S17 | 24-Oct-19 | 18.076721/100.121770 | Yom | North |
| TAK_S04 | 26-Nov-19 | 17.147687/99.117888 | Wang | West |
| NSN_A15 | 22-Oct-19 | 15.902935/100.281310 | Yom | Central |
| NSN_A16 | 23-Oct-19 | 15.902940/100.281350 | Yom | Central |
| STI_S03 | 26-Nov-19 | 17.054422/99.680162 | Yom | Central |
| PLK_S20 | 26-Nov-19 | 17.231652/100.252390 | Nan | Central |
| PLK_A17 | 24-Oct-19 | 16.847246/100.462520 | Nan | Central |
| NSN_A12 | 21-Oct-19 | 15.700322/100.153200 | Nan | Central |
| NSN_A13 | 22-Oct-19 | 15.762161/100.082120 | Chao Phraya | Central |
| SBR_A08 | 19-Oct-19 | 14.775098/100.451360 | Chao Phraya | Central |
Fig. 2
Different morphological types of cercariae and metacercariae: A; xiphidiocercaria, B; monostome cercaria, C; mutabile cercariae, D; ophthalmoxiphidiocercariae, E; microcercous cercariae, F, G, and H; three different morphological types of unknown metacercariae named as type 1, type 2, and type 3, respectively.
Table 2
The prevalence of trematode cercariae and metacercariae infection in Hydrobioides nassa,
| No. of infection | A | B | C | E | Prevalence | No. of infection | D | F | G | H | Prevalence | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CRL_S10 | 100 | 1 | 1 | - | - | - | 1.00 | 2 | - | 2 | - | - | 2.00 |
| CRL_S12 | 62 | - | - | - | - | - | 0.00 | - | - | - | - | - | 0.00 |
| TAK_S04 | 100 | - | - | - | - | - | 0.00 | 25 | - | - | 25 | - | 25.00 |
| PRE_S17 | 120 | - | - | - | - | - | 0.00 | 3 | - | 3 | - | - | 2.50 |
| NSN_A15 | 64 | - | - | - | - | - | 0.00 | 9 | - | - | - | 9 | 14.06 |
| NSN_A16 | 65 | - | - | - | - | - | 0.00 | 1 | 1 ** | - | - | - | 1.54 |
| STL_S03 | 34 | - | - | - | - | - | 0.00 | - | - | - | - | - | 0.00 |
| PLK_S20 | 134 | - | - | - | - | - | 0.00 | 2 | - | - | - | 2 | 1.49 |
| PLK_A17 | 79 | - | - | - | - | - | 0.00 | - | - | - | - | - | 0.00 |
| NSN_A12 | 118 | 10 | - | 8 | 1 | 1 | 8.47 | - | - | - | - | - | 0.00 |
| NSN_A13 | 105 | - | - | - | - | - | 0.00 | - | - | - | - | - | 0.00 |
| SBR_A08 | 43 | - | - | - | - | - | 0.00 | 4 | - | - | 4 | - | 9.30 |
| Total | 1,024 | 11 | 1 | 8 | 1 | 1 | 1.07 | 46 | 1 | 5 | 29 | 11 | 4.49 |
[ii] Different morphological types of cercariae and metacercariae: A; xiphidiocercariae, B; monostome cercariae, C; mutabile cercariae, D; ophthalmoxiphidiocercariae, E; microcercous cercariae, F, G, and H; unknown metacercariae type 1, type 2, and type 3, respectively (see Fig. 2).