Volume 92, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



(Gastropoda: Pomatiopsidae), the snail intermediate host of , is found in Cambodia, Laos, and Thailand. We update information on the distribution of this species in the Mekong River and its tributary, the Mun River, in Thailand. DNA sequences of a portion of the mitochondrial cytochrome c oxidase subunit 1 were obtained from collected from different locations and used to confirm species and strain identities. Specimens of the β-strain were found in the Mun River, whereas specimens of the γ-strain were found in the Mekong River. The γ-strain (with molecular confirmation of identity) is newly reported from Nong Khai Province, where it occurred in a habitat novel for this species: under paving slabs instead of under natural bed rocks, where agal aufwuchs is extensively located on the islet in the middle of the Mekong River. The new location is approximate 400 km upstream from the nearest previously known site for this species.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...



  1. Attwood SW, Upatham ES, , 2012. Observations on Neotricula aperta (Gastropoda: Pomatiopsidae) population densities in Thailand and central Laos: implications for the spread of Mekong schistosomiasis. Parasit Vectors 5: 126.[Crossref] [Google Scholar]
  2. Urbani C, Sinoun M, Socheat D, Pholsena K, Strandgaard H, Odermatt P, Hatz C, , 2002. Epidemiology and control of mekongi schistosomiasis. Acta Trop 82: 157168.[Crossref] [Google Scholar]
  3. Davis GM, Kitikoon V, Temcharoen P, , 1976. Monograph on “Lithoglyphopsisaperta, the snail host of Mekong River Schistosomiasis. Malacologia 15: 241287. [Google Scholar]
  4. Tropmed Technical Group, 1986. Snails of medical importance in Southeast Asia. Southeast Asian J Trop Med Public Health 17: 282322. [Google Scholar]
  5. Attwood SW, Fatih FA, Campbell I, Upatham ES, , 2008. The distribution of Mekong schistosomiasis, past and future: preliminary indications from an analysis of genetic variation in the intermediate host. Parasitol Int 57: 256270.[Crossref] [Google Scholar]
  6. Attwood SW, , 2010. Studies on the parasitology, phylogeography and the evolution of host-parasite interactions for the snail intermediate hosts of medically important trematode genera in Southeast Asia. Adv Parasitol 73: 405440.[Crossref] [Google Scholar]
  7. Attwood SW, Ambu S, Meng X-H, Upatham ES, Xu F-S, Southgate VR, , 2003. The Phylogenetics of Triculine snails (Rissooidea: Pomatiopsidae) from South-east Asia and Southern China: historical biogeography and the transmission of human Schistosomiasis. J Molluscan Stud 69: 263271.[Crossref] [Google Scholar]
  8. Staub KC, Woodruff DS, Upatham ES, Viyanant V, , 1990. Genetic variation in Neotricula aperta, the intermediate snail host of Schistosoma mekongi: allozyme differences reveal a group of sibling species. Am Malacol Bull 7: 93103. [Google Scholar]
  9. Attwood SW, Kitikoon V, Southgate VR, , 1998. Neotricula aperta (Gastropoda: Pomatiopsidae), the intermediate host of Schistosoma mekongi: allozyme variation and relationships between Khmer, Lao and Thai populations. J Zool (Lond) 246: 309324.[Crossref] [Google Scholar]
  10. Attwood SW, , 1999. Genetic variation in Neotricula aperta, the snail intermediate host of Schistosoma mekongi in the lower Mekong Basin. J Zool (Lond) 249: 153164.[Crossref] [Google Scholar]
  11. Attwood SW, Johnston DA, , 2001. Nucleotide sequence differences reveal genetic variation on Neotricula aperta (Gastropoda: Pomatiopsidae), the snail host of Schistosomiasis in the lower Mekong Basin. Biol J Linn Soc Lond 73: 2341.[Crossref] [Google Scholar]
  12. Attwood SW, Upatham ES, Zhang Y-P, Yang ZQ, Southgate VR, , 2004. A DNA-sequence based phylogeny for triculine snails (Gastropoda: Pomatiopsidae: Triculinae), intermediate hosts for Schistosoma (Trematode: Digenea): phylogeography and the origin of Neotricula . J Zool (Lond) 262: 4756.[Crossref] [Google Scholar]
  13. Tamura K, Peterson D, Peterson N, Stecher G, Nei M, Kumar S, , 2011. MEGA5: molecular evolutionary genetics analysis using maximum likelihood, evolutionary distance, and maximum parsimony methods. Mol Biol Evol 28: 27312739.[Crossref] [Google Scholar]

Data & Media loading...

  • Received : 27 Jul 2014
  • Accepted : 09 Nov 2014
  • Published online : 04 Feb 2015

Most Cited This Month

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error