1
|
Tran Thi G, Azzena I, Scarpa F, Cossu P, Danh Le C, Ton Nu PA, Chau Ngo TM, Sanna D, Casu M. Molecular Identification and Appraisal of the Genetic Variation of Taenia saginata in Central Regions of Vietnam. Life (Basel) 2022; 12:70. [PMID: 35054461 PMCID: PMC8781798 DOI: 10.3390/life12010070] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/29/2021] [Accepted: 01/01/2022] [Indexed: 06/14/2023] Open
Abstract
Taenia saginata is a globally distributed tapeworm responsible for human taeniasis due to the ingestion of raw or undercooked beef. T. saginata is present in several Asian countries, including China, Thailand, Lao PDR, Cambodia, and Vietnam, but little is known about its genetic variation. Studying the tapeworm's phylogeographic patterns is crucial to better understanding their association with the geographic distribution of taeniasis/cysticercosis in human populations. In the present study, 38 specimens of this putative species were collected in central regions of Vietnam and analysed using the mitochondrial gene Cytochrome c Oxidase subunit I (COI) as a molecular marker to assess the correct species identification and investigate the level of genetic variation at different geographic scales. Phylogenetic and phylogeographic analyses were carried out on a dataset that included COI sequences from Vietnamese specimens and from all conspecifics available in GenBank to date. The results showed that the collected Vietnamese specimens belonged to the species T. saginata. In Southeast Asia, signs of a possible founder effect were discovered, with the most common haplotypes frequent and present in many countries, except Lao PDR, which shares its most common haplotype only with individuals from Thailand. Remarkably, a unique taxonomic entity was found worldwide, even though the available COI sequences of T. saginata belonging to non-Asiatic countries are, at present, limited. Therefore, future studies including more COI sequences from a higher number of countries and the use of a combined molecular approach with multiple genetic markers would be useful to provide deeper insight into the global genetic variation of this species.
Collapse
Affiliation(s)
- Giang Tran Thi
- Department of Parasitology, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen Street, Hue City 4200, Vietnam; (G.T.T.); (P.A.T.N.); (T.M.C.N.)
| | - Ilenia Azzena
- Dipartimento di Medicina Veterinaria, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy; (I.A.); (F.S.); (P.C.); (M.C.)
- Dipartimento di Scienze Biomediche, Università di Sassari, Viale San Pietro 43/B, 07100 Sassari, Italy
| | - Fabio Scarpa
- Dipartimento di Medicina Veterinaria, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy; (I.A.); (F.S.); (P.C.); (M.C.)
| | - Piero Cossu
- Dipartimento di Medicina Veterinaria, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy; (I.A.); (F.S.); (P.C.); (M.C.)
| | - Cong Danh Le
- Traditional Medicine Hospital of Thua Thien Hue Province, Hue City 4200, Vietnam;
| | - Phuong Anh Ton Nu
- Department of Parasitology, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen Street, Hue City 4200, Vietnam; (G.T.T.); (P.A.T.N.); (T.M.C.N.)
| | - Thi Minh Chau Ngo
- Department of Parasitology, Hue University of Medicine and Pharmacy, Hue University, 06 Ngo Quyen Street, Hue City 4200, Vietnam; (G.T.T.); (P.A.T.N.); (T.M.C.N.)
| | - Daria Sanna
- Dipartimento di Scienze Biomediche, Università di Sassari, Viale San Pietro 43/B, 07100 Sassari, Italy
| | - Marco Casu
- Dipartimento di Medicina Veterinaria, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy; (I.A.); (F.S.); (P.C.); (M.C.)
| |
Collapse
|