1
|
Buathong S, Phaiphilai K, Ruang-Areerate T, Sitthichot N, Thita T, Mungthin M, Suwannahitatorn P. Genetic Differentiation of Opisthorchis-Like Eggs in Northern Thailand Using Stool Specimens Under National Strategic Plan to Control Liver Fluke Infection and Cholangiocarcinoma. Am J Trop Med Hyg 2020; 103:1118-1124. [PMID: 32588808 DOI: 10.4269/ajtmh.20-0231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Liver fluke infection caused by Opisthorchis viverrini is recognized as a potential risk factor for cholangiocarcinoma (CCA). The National Strategic Plan to Control Liver Fluke Infection and Cholangiocarcinoma has implemented microscopic-based stool examination screening. However, eggs of O. viverrini and minute intestinal flukes (MIFs) are nearly morphologically similar and could result in inaccurate O. viverrini diagnosis. Stool specimens were collected from eight districts of Chiang Mai Province in northern Thailand. Opisthorchis-like eggs were identified with the Kato-Katz technique and differentiated for O. viverrini and MIFs using molecular study by PCR and PCR-restriction fragment length polymorphism targeting the internal transcribed spacer 2 (ITS2) gene. Prevalence of Opisthorchis-like eggs was 5.9% from a total of 9,570 specimens. From PCR assays, all liver flukes were O. viverrini and all MIFs were Haplorchis taichui. The distribution of species was H. taichui (38.2%), O. viverrini (10.5%), coinfection of H. taichui and O. viverrini (37.2%), and 14.1% were negative from PCR. Totally, H. taichui was found in 75.4% of infections from Opisthorchis-like specimens. ITS2 nucleotide sequencing analysis showed a single variant of O. viverrini with no variation and two variants of H. taichui. This study first revealed the genetic background of Opisthorchis-like eggs in northern Thailand. Minute intestinal flukes are occasionally misdiagnosed as O. viverrini leading to misinterpretation and overestimation of the burden of O. viverrini infection. Molecular diagnosis such as PCR could effectively discriminate species of Opisthorchis-like eggs and help shape the robustness of epidemiological data to control liver fluke infection and raise awareness of other risk factors for CCA.
Collapse
Affiliation(s)
- Saiwasan Buathong
- Department of Clinical Pathology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand.,Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Kateitsaray Phaiphilai
- Communicable Disease Control Sector, Chiang Mai Provincial Health Office, Chiang Mai, Thailand
| | - Toon Ruang-Areerate
- Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Naruemon Sitthichot
- Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Thanyapit Thita
- Drug Research Unit for Malaria, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Mathirut Mungthin
- Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | | |
Collapse
|
2
|
Buathong S, Dunning FB. Dissociative electron attachment studies with hyperthermal Rydberg atoms. J Chem Phys 2018; 149:104303. [DOI: 10.1063/1.5049597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Buathong
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| | - F. B. Dunning
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| |
Collapse
|
3
|
Dunning FB, Buathong S. Collisions of Rydberg atoms with neutral targets. INT REV PHYS CHEM 2018. [DOI: 10.1080/0144235x.2018.1512201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- F. B. Dunning
- Department of Physics and Astronomy, Rice University, Houston, TX, USA
| | - S. Buathong
- Department of Physics and Astronomy, Rice University, Houston, TX, USA
| |
Collapse
|
4
|
Buathong S, Leelayoova S, Mungthin M, Ruang-areerate T, Naaglor T, Suwannahitatorn P, Piyaraj P, Taamasri P, Tan-ariya P. Molecular discrimination of Opisthorchis-like eggs from residents in a rural community of central Thailand. PLoS Negl Trop Dis 2017; 11:e0006030. [PMID: 29095828 PMCID: PMC5685638 DOI: 10.1371/journal.pntd.0006030] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 11/14/2017] [Accepted: 10/11/2017] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Opisthorchis viverrini infection is a major public health problem in northern and northeastern Thailand. The chronic infection of O. viverrini is related to cholangiocarcinoma which causes high mortality in endemic areas. Therefore, the diagnosis, treatment, control and prevention of O. viverrini infection are necessary. The morphology of the egg is very similar to that of other species of human liver flukes (Opisthorchis felineus and Clonorchis sinensis) as well as that of small intestinal flukes in the family Heterophyidae. Thus, molecular characterization is crucially required to discriminate species of Opisthorchis-like eggs in fecal examination. METHODOLOGY/PRINCIPAL FINDINGS We aimed to determine the prevalence of O. viverrini infection among villagers living in Sanamchaikate District, Chachoengsao Province, in central Thailand, where O. viverrini infection has previously been reported. A total of 2,609 fecal samples were examined for Opisthorchis-like eggs using microscopic examination. PCR-RFLP analysis of the ITS2 region was used to discriminate Opisthorchis-like eggs. The genetic structure of O. viverrini infection was demonstrated using nucleotide sequencing of cytochrome c oxidase subunit I (cox1) and NADH dehydrogenase subunit 1 (nad1). Testing of evolutionary neutrality of the cox1 and nad1 sequences of O. viverrini was performed using Tajima's D tests and Fu's Fs tests. Moreover, the haplotype networks and phylogenetic trees were constructed to study the relationships of O. viverrini isolated from different endemic areas. A high prevalence of O. viverrini infection is still observed in a rural community of Chachoengsao Province, central Thailand. The overall prevalence of Opisthorchis-like eggs using microscopic examination was 16.8%. PCR-RFLP profiles showed the predominant infection of O. viverrini (9.6%) including very low infections of other small intestinal flukes, Haplorchis taichui (0.08%) and Euparyphium albuferensis (0.08%). The genetic structure of O. viverrini populations in central Thailand was also described and revealed a non-significant difference in genetic diversity. In addition, the genetic background of the O. viverrini populations was closely related to the isolate from Lao PDR. CONCLUSIONS/SIGNIFICANCE Our study highlighted the prevalence of O. viverrini infection in central Thailand indicating that control programs and health education regarding opisthorchiasis is still required in this endemic area. Additionally, the study demonstrated the genetic structure of O. viverrini, in central Thailand which could provide information on the molecular epidemiology of this parasite.
Collapse
Affiliation(s)
- Saiwasan Buathong
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Saovanee Leelayoova
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Mathirut Mungthin
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Toon Ruang-areerate
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Tawee Naaglor
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Picha Suwannahitatorn
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Phunlerd Piyaraj
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Paanjit Taamasri
- Department of Parasitology, Phramongkutklao College of Medicine, Ratchathewi, Bangkok, Thailand
| | - Peerapan Tan-ariya
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail:
| |
Collapse
|
5
|
Kelley M, Buathong S, Dunning FB. Very strong Rydberg atom scattering in K(12p)–CH3NO2collisions: Role of transient ion pair formation. J Chem Phys 2017. [DOI: 10.1063/1.4982935] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M. Kelley
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| | - S. Buathong
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| | - F. B. Dunning
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| |
Collapse
|
6
|
Buathong S, Kelley M, Dunning FB. Probing dissociative electron attachment through heavy-Rydberg ion-pair production in Rydberg atom collisions. J Chem Phys 2016; 145:134309. [DOI: 10.1063/1.4964326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- S. Buathong
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| | - M. Kelley
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| | - F. B. Dunning
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005-1892, USA
| |
Collapse
|
7
|
Buathong S, Leelayoova S, Mungthin M, Naaglor T, Taamasri P, Suwannahitatorn P, Tan-Ariya P. Development and evaluation of PCR methods based on cytochrome c oxidase subunit one (cox1) and NADH dehydrogenase subunit one gene (nad1) to detect Opisthorchis viverrini in human fecal samples. Parasitol Res 2015; 114:3547-9. [PMID: 26239798 DOI: 10.1007/s00436-015-4640-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 07/22/2015] [Indexed: 11/24/2022]
Abstract
Opisthorchis viverrini is highly prevalent throughout Southeast Asia. Chronic infection of this parasite leads to cholangiocarcinoma (CCA), a fatal bile duct cancer. The early and accurate detection of this parasite is very important; therefore, new PCR methods targeting cytochrome c oxidase subunit one and NADH dehydrogenase subunit one gene to detect O. viverrini in fecal specimens have been developed. Ninety O. viverrini-positive human fecal samples were used in this study. The PCR sensitivity of both genes was compared with internal transcribe spacer 2 (ITS2)-PCR. The sensitivity of cox1-PCR and nad1-PCR was 66.7 and 50 %, respectively. The sensitivity of cox1-PCR and nad1-PCR achieved 89.1 and 71.7 % in specimens containing O. viverrini eggs of >100 eggs per gram (EPG). Additionally, these primers can be used to provide the information on genetic diversity from mitochondrial genes of O. viverrini.
Collapse
Affiliation(s)
- Saiwasan Buathong
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | | | | | | | | | | | | |
Collapse
|
8
|
Buathong S, Kelley M, Wang C, Dunning F. Probing dissociative electron attachment through formation of heavy-Rydberg ion pair states in Rydberg atom collisions. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.10.074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
9
|
Abstract
The dynamics of formation of heavy-Rydberg ion-pair states through electron transfer in K(np)-SF6, CCl4 collisions is examined by measuring the velocity, angular, and binding energy distributions of the product ion pairs. The results are analyzed with the aid of a Monte Carlo collision code that models both the initial electron capture and the subsequent evolution of the ion pairs. The model simulations are in good agreement with the experimental data and highlight the factors such as Rydberg atom size, the kinetic energy of relative motion of the Rydberg atom and target particle, and (in the case of attaching targets that dissociate) the energetics of dissociation that can be used to control the properties of the product ion-pair states.
Collapse
Affiliation(s)
- C H Wang
- Department of Physics & Astronomy, Rice University, MS-61, Houston, Texas 77005, USA
| | - M Kelley
- Department of Physics & Astronomy, Rice University, MS-61, Houston, Texas 77005, USA
| | - S Buathong
- Department of Physics & Astronomy, Rice University, MS-61, Houston, Texas 77005, USA
| | - F B Dunning
- Department of Physics & Astronomy, Rice University, MS-61, Houston, Texas 77005, USA
| |
Collapse
|
10
|
Buathong S, Peruch F, Isel F, Lutz PJ. From free radical to atom transfer radical polymerization of poly(ethylene oxide) macromonomers in nanostructured media. Des Monomers Polym 2012. [DOI: 10.1163/1568555042474149] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
11
|
Buathong S, Mungthin M, Tan-ariya P, Naaglor T, Taamasri P, Suwannahitatorn P, Leelayoova S. PBS incubation, a simple technique to release miracidia of Opisthorchis-like eggs for DNA extraction. Exp Parasitol 2010; 124:357-9. [DOI: 10.1016/j.exppara.2009.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 11/18/2009] [Accepted: 11/23/2009] [Indexed: 11/24/2022]
|