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Trematode infection in a freshwater snail Hydrobioides nassa (Gastropoda: Bithyniidae) in Thailand

S. Tapdara
S. Tapdara
, 
N. Bunchom
N. Bunchom
, 
W. Pilap
W. Pilap
, 
C. Tantrawatpan
C. Tantrawatpan
 and 
W. Saijuntha
W. Saijuntha
   | May 04, 2022
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Article Category: Research Note
Published Online: May 04, 2022
Page range: 111 - 116
Received: Nov 25, 2021
Accepted: Mar 19, 2022
DOI: https://doi.org/10.2478/helm-2022-0010
Keywords
© 2022 S. Tapdara, N. Bunchom, W. Pilap, C. Tantrawatpan, W. Saijuntha, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Map of sample collection sites of Hydrobioides nassa from six different catchment systems in north, west, and central regions of Thailand.
Map of sample collection sites of Hydrobioides nassa from six different catchment systems in north, west, and central regions of Thailand.

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.
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.

The prevalence of trematode cercariae and metacercariae infection in Hydrobioides nassa,

Code N* Shedding method
 Crushing method
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

Geographical localities of Hydrobioides nassa collection from north, west, and central of Thailand.

Name

The first three letters stand for province name, CRI; Chiang Rai, PRE; Phrae, TAK; Tak, NSN; Nakhon Sawan, STI; Sukhothai, PLK; Phisanulok, SBR; Sing Buri

 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
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