Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts.

Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Research Abstract Details 

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Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Abstract Text:

Weerachai Saijuntha,Paiboon Sithithaworn,Sopit Wongkham,Thewarach Laha,Vichit Pipitgool,Smarn Tesana,Neil B Chilton,Trevor N Petney,Ross H Andrews,Weerachai Saijuntha,Paiboon Sithithaworn,Sopit Wongkham,Thewarach Laha,Vichit Pipitgool,Smarn Tesana,Neil B Chilton,Trevor N Petney,Ross H Andrews,

The food-borne trematodes, Opisthorchis viverrini, O. felineus and Clonorchis sinensis, have long been recognized as the cause of major human health problems, with an estimated 40 million infected persons. Of the three species of liver fluke, only O. viverrini is classified as a type 1 carcinogen because of its role as an initiator of chronic inflammation and the subsequent development of cholangiocarcinoma. At present, there are no techniques for the early diagnosis of cholangiocarcinoma and it is fatal for most patients. There is considerable variation in parasite prevalence and disease presentation in different geographical areas, the latter of which may be associated with genetic differences among parasites. In the present study, multilocus enzyme electrophoresis was used to provide a comprehensive genetic characterization of O. viverrini from different geographical localities in Thailand and the Peoples' Democratic Republic of Laos. Parasites from different localities were compared genetically at 32 enzyme loci. The results of the genetic analyses are sufficient to reject the null hypothesis that O. viverrini represents a single species. Therefore, O. viverrini consists of at least two genetically distinct, yet morphologically similar (i.e. cryptic) species. Moreover, there was also separation of the different populations of snails (i.e. the first intermediate hosts) into two distinct genetic groups that corresponded with the delineation of O. viverrini into two species. This suggests that there may be a history of co-evolution in this host-parasite lineage. Additionally, five distinct genetic groups of parasites were detected, each of which occurred within a different and independent river wetland system. Our findings have major implications for the implementation of effective control and surveillance programs targeted to these medically important food-borne parasites.

Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Publishing Authors By Initials

W Saijuntha,P Sithithaworn,S Wongkham,T Laha,V Pipitgool,S Tesana,NB Chilton,TN Petney,RH Andrews,W Saijuntha,P Sithithaworn,S Wongkham,T Laha,V Pipitgool,S Tesana,NB Chilton,TN Petney,RH Andrews,

For similar genetic phenomena: variation (genetics) research abstracts see: genetic phenomena: variation (genetics) research

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Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: International journal for parasitology

VOLUME: 37

Page Numbers: 695-703

Journal Abbreviation: Int. J. Parasitol.

ISSN: 0020-7519

DAY: 29

MONTH: 12

YEAR: 2006

Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Information

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LANGUAGE: eng

NlmUniqueID: 314024

Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Keywords Mesh Terms:

KEYWORDS: Variation (Genetics)

MESH TERMS: parasitology

Chemical & Substance for Abstract: Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts. Information

Substance Name: Helminth Proteins

Registry Number: 0

Grant and Affiliation Information for Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts.

AFFILIATION: Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.

Country: England

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MEDLINETA: Int J Parasitol

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