Table 2
Occurrences of Bithynia siamensis siamensis and Opisthorchis viverrini s.l., and prevalences of O. viverrini s.l. infection in each sampling locality in the Bangkok Metropolitan Region, Thailand.
| Province | District/Area | Latitude | Longitude |
B. s. siamensis
|
O. viverrini s.l. |
||||
|---|---|---|---|---|---|---|---|---|---|
| Detected frequency (Total n = 7) | Total no. of snails encountered | Total no. of infected snails | Detected frequency (Total n = 7) | Prevalence at detected time | Total prevalence | ||||
| BK | North Thonburi | 13°45′21.2″ N | 100°25′34.0″ E | 6 | 62 | 0 | 0 | 0 | 0 |
| BK | South Thonburi | 13°39′46.7″ N | 100°23′55.8″ E | 1 | 4 | 0 | 0 | 0 | 0 |
| *BK | South Bangkok | 13°42′13.7″ N | 100°39′03.0″ E | 0 | 0 | 0 | 0 | 0 | 0 |
| *BK | Central Bangkok | 13°45′33.2″ N | 100°39′19.4″ E | 0 | 0 | 0 | 0 | 0 | 0 |
| BK | East Bangkok | 13°50′31.7″ N | 100°49′43.6″ E | 7 | 347 | 0 | 0 | 0 | 0 |
| **BK | North Bangkok | 13°50′52.0″ N | 100°34′21.5″ E | 7 | 455 | 1 | 1 | 1.16 | 0.22 |
| NP | Bang Len | 14°01′38.4″ N | 100°10′45.7″ E | 7 | 51 | 0 | 0 | 0 | 0 |
| NP | Kamphaeng Saen | 13°59′33.1″ N | 99°56′37.4″ E | 1 | 1 | 0 | 0 | 0 | 0 |
| NP | Don Tum | 13°56′53.8″ N | 100°06′51.3″ E | 7 | 309 | 0 | 0 | 0 | 0 |
| **NP | MuangNP | 13°50′30.1″ N | 100°02′04.9″ E | 6 | 469 | 1 | 1 | 2.17 | 0.21 |
| NP | Nakhon Chai Sri | 13°46′09.7″ N | 100°07′49.0″ E | 7 | 331 | 0 | 0 | 0 | 0 |
| NP | Sam Phran | 13°45′29.8″ N | 100°14′56.4″ E | 7 | 230 | 0 | 0 | 0 | 0 |
| NP | Phutthamonthon | 13°50′47.9″ N | 100°17′14.6″ E | 6 | 300 | 0 | 0 | 0 | 0 |
| *NB | Pak Kret | 13°55′29.2″ N | 100°28′49.1″ E | 0 | 0 | 0 | 0 | 0 | 0 |
| NB | Bang Bua Thong | 13°56′05.6″ N | 100°22′46.4″ E | 6 | 169 | 0 | 0 | 0 | 0 |
| NB | Sai Noi | 14°01′30.6″ N | 100°18′02.8″ E | 7 | 568 | 0 | 0 | 0 | 0 |
| NB | Bang Yai | 13°51′05.1″ N | 100°22′23.3″ E | 7 | 722 | 0 | 0 | 0 | 0 |
| NB | MuangNB | 13°50′44.8″ N | 100°27′56.9″ E | 1 | 1 | 0 | 0 | 0 | 0 |
| NB | Bang Kruai | 13°48′24.6″ N | 100°23′11.9″ E | 5 | 44 | 0 | 0 | 0 | 0 |
| SS | Krathum Baen | 13°39′27.9″ N | 100°12′46.8″ E | 7 | 253 | 1 | 1 | 4.55 | 0.40 |
| SS | Ban Phaew | 13°35′14.3″ N | 100°07′01.4″ E | 6 | 233 | 0 | 0 | 0 | 0 |
| SS | MuangSS | 13°32′52.0″ N | 100°12′42.4″ E | 1 | 1 | 0 | 0 | 0 | 0 |
| *SP | Phra Samut Chedi | 13°35′50.8″ N | 100°30′23.7″ E | 0 | 0 | 0 | 0 | 0 | 0 |
| SP | Phra Pradaeng | 13°40′44.5″ N | 100°34′38.0″ E | 1 | 1 | 0 | 0 | 0 | 0 |
| *SP | MuangSP | 13°35′35.1″ N | 100°36′38.3″ E | 0 | 0 | 0 | 0 | 0 | 0 |
| SP | Bang Phli | 13°36′03.6″ N | 100°44′46.0″ E | 4 | 11 | 0 | 0 | 0 | 0 |
| SP | Bang Sao Thong | 13°36′58.0″ N | 100°47′51.7″ E | 7 | 156 | 0 | 0 | 0 | 0 |
| SP | Bang Bo | 13°35′27.1″ N | 100°51′26.5″ E | 5 | 112 | 0 | 0 | 0 | 0 |
| **PT | Lam Luk Ka | 13°56′29.0″ N | 100°46′30.1″ E | 7 | 614 | 1 | 1 | 0.85 | 0.16 |
| PT | Thanyaburi | 14°01′58.8″ N | 100°45′21.7″ E | 7 | 391 | 0 | 0 | 0 | 0 |
| PT | Nong Sua | 14°08′12.1″ N | 100°50′45.0″ E | 6 | 198 | 0 | 0 | 0 | 0 |
| PT | Khlong Luang | 14°05′32.9″ N | 100°41′12.7″ E | 7 | 1196 | 0 | 0 | 0 | 0 |
| PT | Sam Khok | 14°04′44.4″ N | 100°29′37.8″ E | 2 | 4 | 0 | 0 | 0 | 0 |
| PT | Lat Lum Kaew | 14°03′07.9″ N | 100°24′24.1″ E | 7 | 238 | 0 | 0 | 0 | 0 |
| PT | MuangPT | 13°58′01.6″ N | 100°33′02.4″ E | 1 | 2 | 0 | 0 | 0 | 0 |
| Overall total | 156 | 7473 | 4 | 4 | 1.47 | 0.05 | |||
Rows with one asterisk (*) and two asterisks (**) at the header row represent a sampling locality without B. s. siamensis distribution and a sampling locality with detected O. viverrini s.l. infection, respectively. Abbreviations: BK = Bangkok, NP = Nakhon Pathom, NB = Nonthaburi, SS = Samut Sakhon, SP = Samut Prakan, PT = Pathum Thani.
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