Journal
PARASITOLOGY INTERNATIONAL
Volume 58, Issue 1, Pages 81-85Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.parint.2008.11.003
Keywords
Vietnam; Fasciola gigantica; Aspermic triploid Fasciola sp.; ITS1; NDI; COI
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [18405035]
- Grants-in-Aid for Scientific Research [18405035] Funding Source: KAKEN
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Fasciola spp. found in Asian countries are diversified in nature, and they should therefore be characterized by spermatogenesis, ploidy and genetic differentiation as well as morphology, The present study showed that spermic diploid and aspermic triploid forms of Fasciola occurred in Vietnam. The spermic diploid specimens were accurately identified as F. gigantica, while the aspermic triploids could not be identified on the basis of their morphology by the ratio of body length and width and DNA sequences of nuclear ribosomal ITS1 and mitochondrial NDI and COI genes. The molecular data also indicated that Vietnamese aspermic triploids might be hybrids and/or their offspring between Fasciola hepatica and E gigantica, because they showed the ITS1-Fh/Fg haplotype, which had chimeric sequences of the two species. Furthermore, the aspermic triploids seem to have originated in countries other than Vietnam and to have rapidly spread to that Country with infected animals. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
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