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Sota P, Upontain S, Tangkawattana S, Punyapornwithaya V, Nakhapakorn K, Sripa B. Association between Opisthorchis viverrini infection in cats and humans: Non-spatial and spatial analyses. Vet Parasitol 2024; 327:110150. [PMID: 38422711 DOI: 10.1016/j.vetpar.2024.110150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/18/2024] [Accepted: 02/18/2024] [Indexed: 03/02/2024]
Abstract
Cats are recognized as significant reservoir hosts for human opisthorchiasis, particularly in areas with a high prevalence of infection. Despite this, the precise role of cats in the transmission of Opisthorchis viverrini between humans and felines remains unclear. This study investigates the association between these two hosts through both spatial and non-spatial analyses in the endemic Thanya sub-district of Thailand. A total of 105 owned cats were randomly sampled from 15 villages within the sub-district for stool examination. A questionnaire was administered to 66 cat owners to explore the human-pet relationship. Household locations were collected using GPS devices. Non-spatial analyses revealed a positive association between the two hosts (P= 0.011; OR 7, 95% CI: 1.6-30.9), highlighting two independent significant risk factors: cat owners consuming raw fish (P = 0.028; OR = 4.52, 95% CI: 1.25-19.45) and feeding cats raw fish (P = 0.011; OR = 16.41, 95% CI: 2.78-317.04) according to multivariate analysis. Spatial analysis provided further support to the non-spatial findings (p = 0.0123; OR = 3.45, 95% CI = 0.88-13.61). Multiple autologistic regression confirmed two significant risk factors: cat owners consuming raw fish (p = 0.054; OR = 3.37, 95% CI: 0.98-11.59) and feeding cats raw fish (p = 0.014; OR = 7.43, 95% CI: 1.49-37.05). Risk mapping identified the western part of the study site as a hotspot for O. viverrini infection. Hyper-endemic focusing revealed a union of human and cat buffers at 0.46 km², with an overlapping area of 0.22 km² (47.83%). This study underscores the impact of owners' behaviors, specifically consuming and feeding raw fish to cats, on the increased probability of infection in cats. It emphasizes the need for effective opisthorchiasis control through health education targeting cat owners in endemic areas.
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Affiliation(s)
- Pornphutthachat Sota
- Graduate School, Khon Kaen University, Khon Kaen 40002, Thailand; WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Songkiad Upontain
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sirikachorn Tangkawattana
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand.
| | | | - Kanchana Nakhapakorn
- Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Banchob Sripa
- Department of Tropical Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand.
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Qian MB, Keiser J, Utzinger J, Zhou XN. Clonorchiasis and opisthorchiasis: epidemiology, transmission, clinical features, morbidity, diagnosis, treatment, and control. Clin Microbiol Rev 2024; 37:e0000923. [PMID: 38169283 PMCID: PMC10938900 DOI: 10.1128/cmr.00009-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 07/18/2023] [Indexed: 01/05/2024] Open
Abstract
Clonorchis sinensis, Opisthorchis viverrini, and Opisthorchis felineus are important liver flukes that cause a considerable public health burden in eastern Asia, southeastern Asia, and eastern Europe, respectively. The life cycles are complex, involving humans, animal reservoirs, and two kinds of intermediate hosts. An interplay of biological, cultural, ecological, economic, and social factors drives transmission. Chronic infections are associated with liver and biliary complications, most importantly cholangiocarcinoma. With regard to diagnosis, stool microscopy is widely used in epidemiologic surveys and for individual diagnosis. Immunologic techniques are employed for screening purposes, and molecular techniques facilitate species differentiation in reference laboratories. The mainstay of control is preventive chemotherapy with praziquantel, usually combined with behavioral change through information, education and communication, and environmental control. Tribendimidine, a drug registered in the People's Republic of China for soil-transmitted helminth infections, shows potential against both C. sinensis and O. viverrini and, hence, warrants further clinical development. Novel control approaches include fish vaccine and biological control. Considerable advances have been made using multi-omics which may trigger the development of new interventions. Pressing research needs include mapping the current distribution, disentangling the transmission, accurately estimating the disease burden, and developing new diagnostic and treatment tools, which would aid to optimize control and elimination measures.
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Affiliation(s)
- Men-Bao Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, People’s Republic of China
- NHC Key Laboratory of Parasite and Vector Biology, Shanghai, People’s Republic of China
- WHO Collaborating Centre for Tropical Diseases, Shanghai, People’s Republic of China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Jennifer Keiser
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Jürg Utzinger
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, People’s Republic of China
- NHC Key Laboratory of Parasite and Vector Biology, Shanghai, People’s Republic of China
- WHO Collaborating Centre for Tropical Diseases, Shanghai, People’s Republic of China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
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Kamber L, Bürli C, Harbrecht H, Odermatt P, Sayasone S, Chitnis N. Modeling the persistence of Opisthorchis viverrini worm burden after mass-drug administration and education campaigns with systematic adherence. PLoS Negl Trop Dis 2024; 18:e0011362. [PMID: 38422118 DOI: 10.1371/journal.pntd.0011362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 03/12/2024] [Accepted: 01/23/2024] [Indexed: 03/02/2024] Open
Abstract
Opisthorchis viverrini is a parasitic liver fluke contracted by consumption of raw fish, which affects over 10 million people in Southeast Asia despite sustained control efforts. Chronic infections are a risk factor for the often fatal bile duct cancer, cholangiocarcinoma. Previous modeling predicted rapid elimination of O. viverrini following yearly mass drug administration (MDA) campaigns. However, field data collected in affected populations shows persistence of infection, including heavy worm burden, after many years of repeated interventions. A plausible explanation for this observation is systematic adherence of individuals in health campaigns, such as MDA and education, with some individuals consistently missing treatment. We developed an agent-based model of O. viverrini which allows us to introduce various heterogeneities including systematic adherence to MDA and education campaigns at the individual level. We validate the agent-based model by comparing it to a previously published population-based model. We estimate the degree of systematic adherence to MDA and education campaigns indirectly, using epidemiological data collected in Lao PDR before and after 5 years of repeated MDA, education and sanitation improvement campaigns. We predict the impact of interventions deployed singly and in combination, with and without the estimated systematic adherence. We show how systematic adherence can substantially increase the time required to achieve reductions in worm burden. However, we predict that yearly MDA campaigns alone can result in a strong reduction of moderate and heavy worm burden, even under systematic adherence. We predict latrines and education campaigns to be particularly important for the reduction in overall prevalence, and therefore, ultimately, elimination. Our findings show how systematic adherence can explain the observed persistence of worm burden; while emphasizing the benefit of interventions for the entire population, even under systematic adherence. At the same time, the results highlight the substantial opportunity to further reduce worm burden if patterns of systematic adherence can be overcome.
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Affiliation(s)
- Lars Kamber
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Christine Bürli
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Helmut Harbrecht
- Department of Mathematics and Computer Science, University of Basel, Basel, Switzerland
| | - Peter Odermatt
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Somphou Sayasone
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
- Lao Tropical and Public Health Institute, Vientiane, Lao People's Democratic Republic
| | - Nakul Chitnis
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
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Chai JY, Jung BK. Epidemiology and Geographical Distribution of Human Trematode Infections. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1454:443-505. [PMID: 39008273 DOI: 10.1007/978-3-031-60121-7_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Digenetic trematodes infecting humans are more than 109 species that belong to 49 genera all over the world. According to their habitat in the definitive hosts, they are classified as 6 blood flukes (Schistosoma japonicum. S. mekongi, S. malayensis, S. mansoni, S. intercalatum, and S. haematobium), 15 liver flukes (Fasciola hepatica, F. gigantica, Clonorchis sinensis, Opisthorchis viverrini, O. felineus, Dicrocoelium dendriticum, D. hospes, Metorchis bilis, M. conjunctus, M. orientalis, Amphimerus sp., A. noverca, A. pseudofelineus, Pseudamphistomum truncatum, and P. aethiopicum), nine lung flukes (Paragonimus westermani, P. heterotremus, P. skrjabini, P. skrjabini miyazakii, P. kellicotti, P. mexicanus, P. africanus, P. uterobilateralis, and P. gondwanensis), 30 heterophyid intestinal flukes (Metagonimus yokogawai, M. takahashii, M. miyatai, M. suifunensis, M. katsuradai, M. pusillus, M. minutus, Heterophyes heterophyes, H. nocens, H. dispar, Haplorchis taichui, H. pumilio, H. yokogawai, H. vanissinus, Centrocestus formosanus, C. armatus, C. cuspidatus, C. kurokawai, Procerovum calderoni, P. varium, Pygidiopsis genata, P. summa, Stictodora fuscata, S. lari, Stellantchasmus falcatus, Heterophyopsis continua, Acanthotrema felis, Apophallus donicus, Ascocotyle longa, and Cryptocotyle lingua), 24 echinostome intestinal flukes (Echinostoma revolutum, E. cinetorchis, E. mekongi, E. paraensei, E. ilocanum, E. lindoense, E. macrorchis, E. angustitestis, E. aegyptica, Isthmiophora hortensis, I. melis, Echinochasmus japonicus, E. perfoliatus, E. lilliputanus, E. caninus, E. jiufoensis, E. fujianensis, Artyfechinostomum malayanum, A. sufrartyfex, A. oraoni, Acanthoparyphium tyosenense, Echinoparymphium recurvatum, Himasthla muehlensi, and Hypoderaeum conoideum), 23 miscellaneous intestinal flukes (Brachylaima cribbi, Caprimolgorchis molenkampi, Phaneropsolus bonnei, P. spinicirrus, Cotylurus japonicus, Fasciolopsis buski, Gastrodiscoides hominis, Fischoederius elongatus, Watsonius watsoni, Gymnophalloides seoi, Gynaecotyla squatarolae, Microphallus brevicaeca, Isoparorchis hypselobagri, Nanophyetus salmincola, N. schikobalowi, Neodiplostomum seoulense, Fibricola cratera, Plagiorchis muris, P. vespertilionis, P. harinasutai, P. javensis, P. philippinensis, and Prohemistomum vivax), one throat fluke (Clinostomum complanatum), and one pancreatic fluke (Eurytrema pancreaticum). The mode of transmission to humans includes contact with cercariae contaminated in water (schistosomes) or ingestion of raw or improperly cooked food, including fish (liver flukes, heterophyid flukes, echinostomes, and throat flukes), snails (echinostomes, brachylaimids, and gymnophallid flukes), amphibia, reptiles (neodiplostomes), aquatic vegetables (fasciolids and amphistomes), and insect larvae or adults (lecithodendriids, plagiorchiids, and pancreatic flukes). Praziquantel has been proven to be highly effective against almost all kinds of trematode infections except Fasciola spp. Epidemiological surveys and detection of human infections are required for a better understanding of the prevalence, intensity of infection, and geographical distribution of each trematode species.
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Affiliation(s)
- Jong-Yil Chai
- Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Bong-Kwang Jung
- MediCheck Research Institute, Korea Association of Health Promotion, Seoul, Republic of Korea
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Saijuntha W, Sithithaworn P, Wangboon C, Andrews RH, Petney TN. Liver Flukes: Clonorchis and Opisthorchis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1454:239-284. [PMID: 39008268 DOI: 10.1007/978-3-031-60121-7_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Clonorchis sinensis, Opisthorchis viverrini and O. felineus are liver flukes of human and animal pathogens occurring across much of Europe and Asia. Nevertheless, they are often underestimated compared to other, better known neglected diseases in spite of the fact that many millions of people are infected and hundreds of millions are at risk. This is possibly because of the chronic nature of the infection and disease and that it takes several decades prior to a life-threatening pathology to develop. Several studies in the past decade have provided more information on the molecular biology of the liver flukes which clearly lead to better understanding of parasite biology, systematics and population genetics. Clonorchiasis and opisthorchiasis are characterized by a chronic infection that induces hepatobiliary inflammation, especially periductal fibrosis, which can be detected by ultrasonography. These chronic inflammations eventually lead to cholangiocarcinoma (CCA), a usually fatal bile duct cancer that develops in some infected individuals. In Thailand alone, opisthorchiasis-associated CCA kills up to 20,000 people every year and is therefore of substantial public health importance. Its socioeconomic impacts on impoverished families and communities are considerable. To reduce hepatobiliary morbidity and CCA, the primary intervention measures focus on control and elimination of the liver fluke. Accurate diagnosis of liver fluke infections in both human and other mammalian, snail and fish intermediate hosts is important for achieving these goals. While the short-term goal of liver fluke control can be achieved by praziquantel chemotherapy, a comprehensive health education package targeting school children is believed to be more beneficial for a long-term goal/solution. It is recommended that transdisciplinary research or multisectoral control approach including one health and/or eco health intervention strategy should be applied to combat the liver flukes and hence contribute to reduction of CCA in endemic areas.
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Affiliation(s)
| | - Paiboon Sithithaworn
- Department of Parasitology and Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
| | - Chompunoot Wangboon
- School of Preclinical Sciences, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Ross H Andrews
- CASCAP, Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Faculty of Medicine, St Mary's Campus, Imperial College London, London, UK
| | - Trevor N Petney
- CASCAP, Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Paleontology and Evolution, State Museum of Natural History, Karlsruhe, Germany
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Menconi V, Lazzaro E, Bertola M, Guardone L, Mazzucato M, Prearo M, Bilska-Zajac E, Cortinovis L, Manfrin A, Arcangeli G, Angeloni G. The Occurrence of Freshwater Fish-Borne Zoonotic Helminths in Italy and Neighbouring Countries: A Systematic Review. Animals (Basel) 2023; 13:3793. [PMID: 38136832 PMCID: PMC10741178 DOI: 10.3390/ani13243793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
In recent years, the consumption of fish products has surged in European countries, being an essential part of a healthy diet. Despite representing a small part of EU production, freshwater fisheries hold considerable significance for lake-dwelling populations and tourists seeking traditional dishes. This increased fish consumption has brought to light potential health risks associated with fish-borne zoonotic helminths (FBZHs), now acknowledged as global food-borne parasites. Fish-borne zoonotic helminths belong to various taxonomic groups, including nematodes (Anisakidae), trematodes (Opisthorchiidae and Heterophyidae), and cestodes (Diphyllobothriidae). More than 50 species of FBZH are known to cause human infections, derived from eating raw or undercooked aquatic foods containing viable parasites. Despite increased attention, FBZHs remain relatively neglected compared to other food-borne pathogens due to factors like chronic disease progression and under-diagnosis. This systematic review concentrates on the prevalence of six freshwater FBZHs (Clinostomum complanatum, Contracaecum rudolphii, Dibothriocephalus latus, Eustrongylides excisus, Opisthorchis felineus, and Pseudamphistomum truncatum) in Italy and neighbouring countries. The study explores the expansion of these parasites, analysing their biological and epidemiological aspects, and the factors that influence their proliferation, such as the increased cormorant population and the lake eutrophication phenomena. In summary, this research highlights the necessity for further research, the development of spatial databases, and the establishment of a unified European policy to effectively manage these multifaceted health concerns. It strongly advocates adopting a One-Health approach to address the growing incidence of parasitic zoonoses within the context of food safety in EU countries.
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Affiliation(s)
- Vasco Menconi
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Elena Lazzaro
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Michela Bertola
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Lisa Guardone
- Istituto Zooprofilattico Sperimentale del Piemonte Liguria e Valle D’Aosta, Via Bologna 148, 10154 Torino, Italy (M.P.)
| | - Matteo Mazzucato
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Marino Prearo
- Istituto Zooprofilattico Sperimentale del Piemonte Liguria e Valle D’Aosta, Via Bologna 148, 10154 Torino, Italy (M.P.)
| | - Ewa Bilska-Zajac
- Department of Parasitology and Invasive Diseases, National Veterinary Research Institute, Partyzantow Avenue 57, 24-100 Pulawy, Poland;
| | - Luana Cortinovis
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Amedeo Manfrin
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Giuseppe Arcangeli
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
| | - Giorgia Angeloni
- Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università, 10, 35020 Legnaro, Italy; (V.M.); (E.L.); (M.M.); (L.C.); (A.M.); (G.A.); (G.A.)
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Tan S, Machrumnizar M. Fish and Food-Fatale: Food-borne Trematode Opisthorchis viverrini and Cholangiocarcinoma. Helminthologia 2023; 60:287-299. [PMID: 38222491 PMCID: PMC10787637 DOI: 10.2478/helm-2023-0036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 10/20/2023] [Indexed: 01/16/2024] Open
Abstract
Neglected Tropical Diseases (NTDs) are a group of communicable diseases with a long history with human beings. NTDs are the proxy of poverty since they affect those in low-income and extreme-poverty populations, as those populations lack access to proper health care, clean water, sanitary conditions, and hygiene. NTDs create losses for a nation that come from the health and the economic sectors as well since the costs of diagnosis, prevention, and treatment strain the national purse strings. One of the 20 different forms of NTDs on the list is food-borne trematodes, comprises of Fasciola, Paragonimus, Clonorchis, and Opisthorchis. Currently, it is estimated that food-borne trematodes can cause a devastating effect on mortality and morbidity. All of them are zoonotic, as humans become infected by ingestion of a second intermediate host, such as freshwater snails, fish, or water vegetables. Opisthorchis viverrini, one of the food-borne trematodes that can be found mostly in South East Asia regions, especially in the Mekong basin, is regarded as a group 1 carcinogen leading to cholangiocarcinoma (CCA). This study aims to present the updated review of Opisthorchis viverrini and CCA.
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Affiliation(s)
- S. Tan
- Department of Parasitology, Faculty of Medicine, Universitas Trisakti, Jakarta11440, Indonesia
- Tropical Diseases and Public Health Research Centre, Faculty of Medicine, Universitas Trisakti, Jakarta11440, Indonesia
| | - M. Machrumnizar
- Department of Parasitology, Faculty of Medicine, Universitas Trisakti, Jakarta11440, Indonesia
- Tropical Diseases and Public Health Research Centre, Faculty of Medicine, Universitas Trisakti, Jakarta11440, Indonesia
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Sakamoto M, Upontain S, Sota P, Mariner J, Tangkawattana P, Tangkawattana S. Roaming behavior of the owned domestic cats (Felis catus) with possible roles in the transmission of Opisthorchis viverrini in the endemic area in Khon Kaen, Thailand. Acta Trop 2023; 247:107013. [PMID: 37660777 DOI: 10.1016/j.actatropica.2023.107013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 09/05/2023]
Abstract
In the endemic area of the liver fluke (Opisthorchis viverrini) infection, effective control of opisthorchiasis using One Health approaches requires transmission interruption in all hosts in the parasite life cycle. Owned domestic cats (Felis catus) are considered an important species among mammalian reservoirs. Similar to humans, household cats become infected by eating raw, contaminated fish and spread the O. viverrini eggs to the environment by defecation. In rural areas, cat owners usually feed their cats with human food or food waste, especially fish dishes. There is a high risk for cats to become infected and deposit eggs in the peri-household environment. The lack of research on domestic cats led us to study their roaming behavior, roaming range, habitat preference and risk of disease transmission. GPS loggers were harnessed to 28 domestic cats in 7 villages around Lawa Lake, the endemic area of human opisthorchiasis. All cats were examined for the O. viverrini infection status using modified formalin-ether concentration technique (MFECT) before application of the GPS device used to observe and record their roaming distance and range area. Then, composition analysis for habitat selection was performed using the location data. Additionally, cat owners were interviewed using participatory epidemiologic methods for their perceptions and knowledge about the reservoir hosts of this trematode. Our study suggested that the prevalence of O. viverrini in cats in this area has not declined appreciably in comparison with our previous study four years ago, although the treatment and control has been applied intensively in humans. The longest distance that individual cats roamed ranged from 51 to 363 meters (mean±SD = 154.48±90.71). The cats traveled tracks around their home. There was no significant difference in the average distance that cats ranged between O. viverrini infected group (154.13±72.80 meters) and the non-infected group (154.67±101.39 meters) was found. Compositional analysis suggested that the domestic cats preferred urban habitats where food and safety were probably more available. It appears that the main transmission route for infection of cats was contaminated fish fed to cats or fish that remained in their houses. Therefore, owners should refrain from feeding their cats potentially contaminated foods, food scraps and raw fish remains and prevent their cats from accessing them. Moreover, the participatory epidemiology results suggest that awareness of villagers is not enough for the effective and sustainable control of the disease.
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Affiliation(s)
- Makoto Sakamoto
- Tufts University, Cummings School of Veterinary Medicine, MA, USA
| | - Songkiad Upontain
- Tropical Disease Research Center, WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Pornphutthachat Sota
- Tropical Disease Research Center, WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Jeffrey Mariner
- Tufts University, Cummings School of Veterinary Medicine, MA, USA
| | | | - Sirikachorn Tangkawattana
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Tropical Disease Research Center, WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Khon Kaen University, Khon Kaen 40002, Thailand.
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Fonti N, Parisi F, Mancianti F, Freer G, Poli A. Cancerogenic parasites in veterinary medicine: a narrative literature review. Infect Agent Cancer 2023; 18:45. [PMID: 37496079 PMCID: PMC10373346 DOI: 10.1186/s13027-023-00522-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 07/17/2023] [Indexed: 07/28/2023] Open
Abstract
Parasite infection is one of the many environmental factors that can significantly contribute to carcinogenesis and is already known to be associated with a variety of malignancies in both human and veterinary medicine. However, the actual number of cancerogenic parasites and their relationship to tumor development is far from being fully understood, especially in veterinary medicine. Thus, the aim of this review is to investigate parasite-related cancers in domestic and wild animals and their burden in veterinary oncology. Spontaneous neoplasia with ascertained or putative parasite etiology in domestic and wild animals will be reviewed, and the multifarious mechanisms of protozoan and metazoan cancer induction will be discussed.
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Affiliation(s)
- Niccolò Fonti
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy.
| | - Francesca Parisi
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy
| | - Francesca Mancianti
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy
| | - Giulia Freer
- Dipartimento di Ricerca Traslazionale e delle Nuove Tecnologie in Medicina e Chirurgia, Università di Pisa, Via Savi, 10, 56126, Pisa, Italy
| | - Alessandro Poli
- Dipartimento di Scienze veterinarie, Università di Pisa, Viale delle Piagge, 2, 56124, Pisa, Italy
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10
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Liau MYQ, Toh EQ, Shelat VG. Opisthorchis viverrini-Current Understanding of the Neglected Hepatobiliary Parasite. Pathogens 2023; 12:795. [PMID: 37375485 DOI: 10.3390/pathogens12060795] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 05/28/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
Opisthorchiasis due to Opisthorchis viverrini infection continues to be a significant public healthcare concern in various subregions of Southeast Asia, particularly in Thailand, Laos, Cambodia, Myanmar, and Vietnam. The main mode of transmission is via consumption of raw or undercooked fish, which is deeply embedded in the culture and tradition of the people living near the Mekong River. After ingestion, the flukes migrate to the bile ducts, potentially causing many hepatobiliary complications, including cholangitis, cholecystitis, cholelithiasis, advanced periductal fibrosis and cholangiocarcinoma. Several mechanisms of opisthorchiasis-associated cholangiocarcinogenesis have been proposed and elucidated in the past decade, providing insight and potential drug targets to prevent the development of the sinister complication. The gold standard for diagnosing opisthorchiasis is still via stool microscopy, but the advent of novel serological, antigen, and molecular tests shows promise as more convenient, alternative diagnostic methods. The mainstay of treatment of opisthorchiasis is praziquantel, while treatment of opisthorchiasis-associated cholangiocarcinoma depends on its anatomic subtype and resectability. Thus far, the most successful fluke control programme is the Lawa model based in Thailand, which raised awareness, incorporated education, and frequent surveillance of intermediate hosts to reduce transmission of opisthorchiasis. Development of vaccines using tetraspanins shows promise and is currently ongoing.
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Affiliation(s)
- Matthias Yi Quan Liau
- Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Singapore 308232, Singapore
| | - En Qi Toh
- Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Singapore 308232, Singapore
| | - Vishalkumar Girishchandra Shelat
- Department of General Surgery, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore
- Surgical Science Training Centre, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore
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11
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Foodborne Parasites and Their Complex Life Cycles Challenging Food Safety in Different Food Chains. Foods 2022; 12:foods12010142. [PMID: 36613359 PMCID: PMC9818752 DOI: 10.3390/foods12010142] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022] Open
Abstract
Zoonotic foodborne parasites often represent complex, multi host life cycles with parasite stages in the hosts, but also in the environment. This manuscript aims to provide an overview of important zoonotic foodborne parasites, with a focus on the different food chains in which parasite stages may occur. We have chosen some examples of meat-borne parasites occurring in livestock (Taenia spp., Trichinella spp. and Toxoplasma gondii), as well as Fasciola spp., an example of a zoonotic parasite of livestock, but transmitted to humans via contaminated vegetables or water, covering the 'farm to fork' food chain; and meat-borne parasites occurring in wildlife (Trichinella spp., Toxoplasma gondii), covering the 'forest to fork' food chain. Moreover, fish-borne parasites (Clonorchis spp., Opisthorchis spp. and Anisakidae) covering the 'pond/ocean/freshwater to fork' food chain are reviewed. The increased popularity of consumption of raw and ready-to-eat meat, fish and vegetables may pose a risk for consumers, since most post-harvest processing measures do not always guarantee the complete removal of parasite stages or their effective inactivation. We also highlight the impact of increasing contact between wildlife, livestock and humans on food safety. Risk based approaches, and diagnostics and control/prevention tackled from an integrated, multipathogen and multidisciplinary point of view should be considered as well.
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Sota P, Alene KA, Andityas M, Tangkawattana S, Sripa B, Clements ACA. Effectiveness of public health interventions in reducing the prevalence of Opisthorchis viverrini: a protocol for systematic review and network meta-analysis. BMJ Open 2022; 12:e064573. [PMID: 36691213 PMCID: PMC9462107 DOI: 10.1136/bmjopen-2022-064573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/19/2022] [Indexed: 01/26/2023] Open
Abstract
INTRODUCTION The carcinogenic liver fluke Opisthorchis viverrini is a major public health problem in the Mekong basin region. The liver flukes can induce cholangiocarcinoma, a bile duct cancer that causes a significant burden of mortality and economic loss. Various public health interventions have been conducted to reduce opisthorchiasis but the prevalence of O. viverrini remains high in endemic regions. The aim is to quantify the effectiveness of public health interventions in reducing the prevalence of O. viverrini infection. METHODS AND ANALYSIS Seven databases (including PubMed, SCOPUS, Web of Science, EMBASE, ScienceDirect, Thai thesis database and TCI (Thai journals online)) will be searched from initiation through to 2022 to identify studies of interventions to reduce the prevalence of O. viverrini infection. The prevalence, incidence or number of O. viverrini-infected people will be used as the source of O. viverrini prevalence data. A conventional meta-analysis and a Bayesian network meta-analysis will be conducted to undertake direct and indirect comparisons of different interventions. Meta-regression will be used to determine the effect of each intervention. The risk of bias will be assessed using the Cochrane Collaboration's risk of bias tool. Heterogeneity between studies will be determined by forest plots and I2 and publication bias investigated with funnel plots and the Egger's test. ETHICS AND DISSEMINATION Ethical approval will not be required because this study will only use published data. The final report of this review will be disseminated through publication in a peer-reviewed scientific journal and will also be presented at relevant conferences. PROSPERO REGISTRATION NUMBER CRD42022323066.
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Affiliation(s)
- Pornphutthachat Sota
- Graduate School, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
- WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
| | - Kefyalew Addis Alene
- Geospatial Health and Development, Telethon Kids Institute, Nedlands, Western Australia, Australia
- School of Population Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia, Australia
| | - Morsid Andityas
- WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
- Faculty of Veterinary Medicine, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
| | - Sirikachorn Tangkawattana
- WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
- Faculty of Veterinary Medicine, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
| | - Banchob Sripa
- WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
- Department of Pathology, Faculty of Medicine, Khon Kaen University, Mueang Khon Kaen, Khon Kaen, Thailand
| | - Archie C A Clements
- Geospatial Health and Development, Telethon Kids Institute, Nedlands, Western Australia, Australia
- School of Population Health, Faculty of Health Sciences, Curtin University, Perth, Western Australia, Australia
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Sota P, Suttiprapa S, Tangkawattana S, Sripa M, Blair D, Sripa B. Does Opisthorchis viverrini circulate between humans and domestic cats in an endemic area in Thailand? Parasitology 2022; 149:1334-1338. [PMID: 35535483 PMCID: PMC11010474 DOI: 10.1017/s0031182022000646] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/29/2022] [Accepted: 04/18/2022] [Indexed: 11/06/2022]
Abstract
The liver fluke Opisthorchis viverrini is a foodborne trematode that, in chronic infection, is a leading cause of bile-duct cancer – cholangiocarcinoma. Cats and dogs are acknowledged as reservoir hosts of this parasite. However, this assumption is based on morphological similarity of flukes recovered from these hosts, without any molecular genetic evidence. The aim of this study was to obtain molecular data from O. viverrini eggs present in feces of humans and cats in the same locality in Thanya sub-district, Kalasin, Thailand. The mitochondrial cytochrome c oxidase subunit 1 (cox1) gene was used as the marker for a population-genetic study. A DNA fragment of the cox1 gene was amplified from stool samples and subjected to nucleotide sequencing. Phylogenetic and haplotype network analyses were performed. The cox1 sequences of O. viverrini eggs from humans and cats largely formed separate clades on the phylogenetic trees, with an Fst value of 0.64 (P < 0.05), indicating largely distinct populations in the 2 species. However, 5 samples from cats were placed in the human cluster and 1 sample from a human was placed in the cat cluster. This suggests that host specificity of ‘human’ and ‘cat’ clades is not absolute. These results indicate that there are 2 populations of O. viverrini, one circulates primarily in humans and the other in cats. However, cross-transmission can occur between these 2 hosts. Taken altogether, the population-genetic evidence from this study partially supports the assumption that the cat can act as a reservoir host of O. viverrini.
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Affiliation(s)
- Pornphutthachat Sota
- Graduate School, Khon Kaen University, Khon Kaen 40002, Thailand
- WHO Collaborating Center for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sutas Suttiprapa
- WHO Collaborating Center for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand
- Tropical Medicine International Program, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sirikachorn Tangkawattana
- WHO Collaborating Center for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Manop Sripa
- WHO Collaborating Center for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand
| | - David Blair
- College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia
| | - Banchob Sripa
- WHO Collaborating Center for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Center, Khon Kaen University, Khon Kaen 40002, Thailand
- Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
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Kopolrat KY, Singthong S, Khuntikeo N, Loilome W, Worasith C, Homwong C, Wangboon C, Yasaka P, Eamudomkarn C, Pitaksakulrat O, Tonkhamhak K, Paeyo A, Crellen T, Sithithaworn J, Sithithaworn P. Performance of Mini Parasep ® SF stool concentrator kit, Kato-Katz, and formalin-ethyl acetate concentration methods for diagnosis of opisthorchiasis in Northeast Thailand. Parasit Vectors 2022; 15:234. [PMID: 35761311 PMCID: PMC9235228 DOI: 10.1186/s13071-022-05338-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 05/24/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Control and elimination of the liver fluke (Opisthorchis viverrini) is a primary preventive strategy against cholangiocarcinoma in Southeast Asia. A sensitive parasitological diagnostic method is required to facilitate a surveillance and control program. In this study, we evaluated the performance of Mini Parasep® SF stool concentrator kit (stool kit) compared with Kato-Katz (KK) and the quantitative formalin-ethyl acetate concentration technique (FECT) for detection of O. viverrini and co-endemic parasitic infections. METHODS A cross-sectional survey for parasitic infection in residents aged > 15 years in a community in Kalasin province, Northeast Thailand, was conducted in 2018. Fecal samples were collected and screened by KK method, and a subset of samples was further examined by the stool kit and FECT methods. The results were analyzed for prevalence of parasitic infections in addition to the diagnostic performance of the methods for qualitative and quantitative detection of helminthiases. RESULTS The initial survey of parasitic infection determined by the KK method (n = 567) showed the prevalence of O. viverrini was 32.63%, followed by Taenia 2.65%, echinostomes 1.76%, hookworms 1.41%, Trichuris trichiura 0.53% and Strongyloides stercoralis 0.53%. Within a subset of samples tested with multiple diagnostics (n = 150), the detection rates of O. viverrini by the stool kit, FECT and KK methods were 27.3%, 30.7% and 28.7%, respectively. The diagnostic sensitivity for opisthorchiasis was similar for FECT (75.5%), KK(66.0%) and the stool kit (67.3%). For other parasitic infections, FECT and stool kit methods performed better than KK, particularly in detecting minute intestinal flukes (MIF), S. stercoralis and coinfections. When measuring the intensity of O. viverrini infection (fecal egg counts), the stool kit results showed a significant positive correlation with KK and FECT (P < 0.05). CONCLUSIONS As the stool kit is simple to use and shows a comparable performance to FECT, it may serve as an alternative method of fecal examination for screening of helminthiasis including opisthorchiasis.
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Affiliation(s)
- Kulthida Y. Kopolrat
- Faculty of Public Health, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon, Thailand
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Seri Singthong
- The Office of Disease Prevention and Control 7 Khon Kaen, Department of Disease Control, Ministry of Public Health, Khon Kaen, Thailand
| | - Narong Khuntikeo
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Watcharin Loilome
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Chanika Worasith
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Chutima Homwong
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Chompunoot Wangboon
- School of Pre Clinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Patiwat Yasaka
- Faculty of Management Technology, Rajamangala University of Technology Isan, Surin Campus, Surin, Thailand
| | - Chatanun Eamudomkarn
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Opal Pitaksakulrat
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Krisnakorn Tonkhamhak
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Arunee Paeyo
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Thomas Crellen
- Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Graham Kerr Building, Glasgow, G12 8QQ UK
- Big Data Institute, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7LF UK
| | | | - Paiboon Sithithaworn
- Cholangiocarcinoma Research Institute and Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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Moendeg KJ, Leonardo LR, Isorena TG, Hilotina FCAS, Pates IS, Cacayorin NO. Prevalence and spatial distribution of heterophyidiasis in Southern Philippines. Acta Trop 2021; 220:105940. [PMID: 33932365 DOI: 10.1016/j.actatropica.2021.105940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 04/16/2021] [Accepted: 04/21/2021] [Indexed: 02/08/2023]
Abstract
Heterophyidiasis is a fish-borne zoonotic disease that is considered to be an emerging public health problem in the Philippines. This study was carried out to determine the spatial distribution and risk factors of heterophyidiasis in five selected villages in New Corella, Davao del Norte in Southern Mindanao. Of the 1,101 individuals examined, 26 (2.36% overall prevalence rate, 95% CI 1.46-3.25) were positive for heterophyid eggs. Higher infection rate was observed in males (3.85%, 95% CI 2.27-5.43) than females (0.76%, 95% CI 0.02-1.5). Mapping of cases was done to show the spatial distribution of heterophyidiasis in New Corella. Multiple logistic regression analysis showed that gender, raw freshwater fish consumption, undercooked grilled fish consumption and proximity to rivers or creeks are the risk factors significantly associated with heterophyid infection. This study confirmed the presence of heterophyid infection in humans in the surveyed villages in New Corella in Southern Philippines.
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Nagaoka F, Yamazaki T, Akashi-Takamura S, Itoh M. Detection of Urinary Antibodies and Its Application in Epidemiological Studies for Parasitic Diseases. Vaccines (Basel) 2021; 9:778. [PMID: 34358194 PMCID: PMC8310028 DOI: 10.3390/vaccines9070778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/25/2021] [Accepted: 07/06/2021] [Indexed: 01/23/2023] Open
Abstract
For epidemiological studies of infectious diseases, pathogen-specific antibody levels in an area give us essential and appropriate information. The antibodies against pathogens are usually detected in blood, the drawing of which inconveniences people. Collection of blood increases the risk of accidental infections through blood, and it is difficult to obtain the participation of the target populations, especially the younger generation. On the other hand, urine samples, which contain a high enough level of antibodies for ELISA, can be harmlessly and easily collected and therefore have been used for epidemiological studies for diseases. The antibody examination of urine has been used for the epidemiology of parasitic diseases with a high sensitivity and specificity of serum samples. In this paper, we reviewed antibody assays with urine for seven parasitic diseases that urine diagnostic methods have reported in the past, and these are important infections included in NTDs, caused, for example, by Leishmania donovani, Wuchereria bancrofti, Schistosoma japonicum, Paragonimus westermani, Echinococcus granulosus, Echinococcus multilocularis, Strongyloides stercoralis, and Opisthorchis viverrini. The easy and safe urine surveillance system might be an admirable tool for future epidemiological studies for infectious diseases.
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Affiliation(s)
| | | | | | - Makoto Itoh
- Department of Microbiology and Immunology, School of Medicine, Aichi Medical University, Aichi 480-1195, Japan; (F.N.); (T.Y.); (S.A.-T.)
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Tangkawattana S, Sereerak P, Upontain S, Tangkawattana P, Sripa B. Investigation of possible alternate animal reservoir hosts of Opisthorchis viverrini. Acta Trop 2021; 217:105850. [PMID: 33524385 DOI: 10.1016/j.actatropica.2021.105850] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 01/19/2021] [Accepted: 01/22/2021] [Indexed: 12/16/2022]
Abstract
Chronic opisthorchiasis caused by Opisthorchis viverrini (O. viverrini) adversely affects human health and is associated with a fatal bile duct cancer (cholangiocarcinoma). Although cats and dogs are known animal reservoir hosts of opisthorchiasis, there is limited information about whether other fish-eating animals are fluke reservoirs. Wetlands along Chi River of Thailand have abundant intermediate host snails and fish for O. viverrini and diverse other animal species. This led to our investigation into whether other fish-eating animals can also become infected and be alternate reservoir hosts for human opisthorchiasis. Our preliminary study focused on the O. viverrini infection status of crab-eating or long-tailed macaques roaming in Kosumpi National Forest Park in Chi River Basin, Kosumpisai District of Mahasarakam Province, and rodents, small residential mammals and fish-eating birds living in Lawa wetland complex of Khon Kaen Province. Fecal samples of each animal were collected and modified formalin ether concentration technique was applied to identify infections. Additionally, participatory epidemiology was used to retrieve information from local communities on opisthorchiasis transmission in these animals. No O. viverrini infection was found in any fecal samples suggesting that monkeys, rodents, small residential mammals and birds in these two wetlands probably do not serve as alternate reservoir hosts of O. viverrini.
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Rachprakhon P, Purivirojkul W. Very low prevalence of Opisthorchis viverrini s.l. cercariae in Bithynia siamensis siamensis snails from the canal network system in the Bangkok Metropolitan Region, Thailand. Parasite 2021; 28:2. [PMID: 33416490 PMCID: PMC7792506 DOI: 10.1051/parasite/2020072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 12/11/2020] [Indexed: 01/23/2023] Open
Abstract
The liver fluke Opisthorchis viverrini s.l. is associated with a long-term public health problem in Thailand. However, O. viverrini s.l. infection in Bithynia snails in the canal network system (CNS) in the Bangkok Metropolitan Region (BMR) has never been assessed. This study aimed to investigate the occurrence of B. siamensis siamensis and the prevalence of O. viverrini s.l. infection in this snail in the CNS in BMR along with morphological examination and molecular analyses on O. viverrini s.l. cercariae. The snails were randomly sampled from the CNS in all BMR areas from January 2018 to July 2019. Snail specimens were identified and examined for digenean infection by shedding and dissection. The cercariae were identified using morphology and molecular methods, including PCR with a species-specific primer and a Bayesian phylogenetic analysis of ITS2 sequences. Bithynia siamensis siamensis was found in almost all sampling localities, with different quantities and detected frequencies. From a total of 7473 B. s. siamensis specimens, O. viverrini s.l. infections were detected in the Northern Bangkok, Muang Nakhon Pathom, Krathum Baen, and Lam Luk Ka areas with an overall prevalence of 0.05% (4/7473) and prevalence of 0.22% (1/455), 0.21% (1/469), 0.40% (1/253), and 0.16% (1/614) in individual localities with positive snails, respectively. This study is the first investigation of digenean infection in the canal network system-type habitat in Thailand and revealed extremely low O. viverrini s.l. prevalence.
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Affiliation(s)
- Phuphitchan Rachprakhon
- Animal Systematics and Ecology Speciality Research Unit, Department of Zoology, Faculty of Science, Kasetsart University Bang Khen Campus 10900 Bangkok Thailand
| | - Watchariya Purivirojkul
- Animal Systematics and Ecology Speciality Research Unit, Department of Zoology, Faculty of Science, Kasetsart University Bang Khen Campus 10900 Bangkok Thailand
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Suyapoh W, Tangkawattana S, Suttiprapa S, Punyapornwithaya V, Tangkawattana P, Sripa B. Synergistic effects of cagA+ Helicobacter pylori co-infected with Opisthorchis viverrini on hepatobiliary pathology in hamsters. Acta Trop 2021; 213:105740. [PMID: 33159904 DOI: 10.1016/j.actatropica.2020.105740] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 12/12/2022]
Abstract
Human liver fluke infection caused by Opisthorchis viverrini is associated with several biliary diseases including cholangiocarcinoma (CCA). Recently, it was discovered that the liver fluke is a reservoir of Helicobacter pylori, particularly the cagA-positive strain (cytotoxin-associated gene A) in its gut. Given that two carcinogenic pathogens are associated with CCA development, however, the role of cagA-positive H. pylori in opisthorchiasis has not been clarified. The present study was therefore aimed to investigate histopathological changes of the biliary system in hamsters co-infected with O. viverrini and cagA-positive H. pylori or O. viverrini and cagA-negative H. pylori, with controls of O. viverrini, cagA-positive H. pylori, or cagA-negative H. pylori alone, over time. Major histopathological changes were systematically investigated. All pathological features were quantified/semi-quantified and compared among the experimental groups. The results showed that O. viverrini infection groups (O. viverrini, cagA-positive H. pylori and cagA-negative H. pylori) showed a high degree of eosinophil and mononuclear cell infiltration, lymphoid aggregation and granuloma. Specifically, O. viverrini co-infected with cagA-positive H. pylori presented significantly higher inflammatory scores than O. viverrini and O. viverrini with cagA-positive H. pylori. Proliferation and adaptive lesions such as hyperplasia, goblet cell metaplasia and dysplasia were detected only in O. viverrini infection groups. Dysplasia, the precancerous lesion of CCA, was observed in the first-order bile ducts, especially where the inflammation existed and was found earlier and more severely in O. viverrini with cagA-positive H. pylori than other groups. Similarly, the BrdU (bromodeoxyuridine) proliferation index was significantly higher in O. viverrini co-infected with cagA-positive H. pylori than O. viverrini and O. viverrini with cagA-negative H. pylori groups. Periductal fibrosis was a prominent histopathologic feature in chronic infection in O. viverrini infection groups. Multiple logistic regression showed that O. viverrini co-infected with cagA-positive H. pylori and the duration of infection were the most important factors associated with periductal fibrosis (OR 3.02, 95% CI 1.02-9.29, p = 0.04 and OR 3.82, 95% CI 2.61-5.97, p<0.001). This study demonstrates that the liver fluke co-infected with cagA-positive H. pylori induces severe biliary pathology that may predispose to cholangiocarcinogenesis.
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Wang YC, Liew TZ, Namsanor J, Sithithaworn P. Assessing the role of Filopaludina martensi martensi as a biocontrol agent of Bithynia siamensis goniomphalos, the first intermediate host of Opisthorchis viverrini. Parasitol Res 2020; 119:3415-3431. [PMID: 32783072 DOI: 10.1007/s00436-020-06837-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 07/28/2020] [Indexed: 01/23/2023]
Abstract
The freshwater snail Bithynia siamensis goniomphalos serves as the first intermediate host of liver fluke Opisthorchis viverrini, a foodborne parasite, of which human infection has persisted in Southeast Asia for decades. The snail Filopaludina martensi martensi has been proposed as a biological control agent against B.s. goniomphalos, but knowledge on the snail ecology and population dynamics between the two species remains rudimentary. This study investigated selected abiotic and biotic factors influencing the distribution and abundance of B.s. goniomphalos and F.m. martensi. Water quality, soils, and snails were collected from 34 localities in Northeast Thailand. Soil properties and snail soft tissue elemental concentrations were analyzed. Experiments were performed to examine interspecific competition. Statistical analysis was conducted to explore the associations between water and soil properties and soft tissue elemental concentrations. The results showed that B.s. goniomphalos had the highest mean dominance in streams and red-yellow podzolic soils, while F.m. martensi snails preferred ponds and latosol soils. Negative correlation in species abundances was found between the two species. Interspecific competition was detected, with B.s. goniomphalos growth rates hampered by the presence of F.m. martensi. Despite the possibility of using F.m. martensi to control B.s. goniomphalos, B.s. goniomphalos exhibited a greater adaptability to different water and soil properties, suggesting that the species could colonize a wide range of environmental conditions. This study provides further insights into the ecology of the two snail species, underscoring the importance of considering abiotic factors when assessing the possible biological control agent to control O. viverrini transmission.
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Affiliation(s)
- Yi-Chen Wang
- Department of Geography, National University of Singapore, 1 Arts Link, Singapore, 117570, Singapore.
| | - Timothy Zherui Liew
- Department of Geography, National University of Singapore, 1 Arts Link, Singapore, 117570, Singapore
| | - Jutamas Namsanor
- Department of Geography, National University of Singapore, 1 Arts Link, Singapore, 117570, Singapore. .,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand. .,Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.
| | - Paiboon Sithithaworn
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
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21
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Nguyen TTB, Dermauw V, Dahma H, Bui DT, Le TTH, Phi NTT, Lempereur L, Losson B, Vandenberg O, Do DT, Dorny P. Prevalence and risk factors associated with Clonorchis sinensis infections in rural communities in northern Vietnam. PLoS Negl Trop Dis 2020; 14:e0008483. [PMID: 32745095 PMCID: PMC7425981 DOI: 10.1371/journal.pntd.0008483] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 08/13/2020] [Accepted: 06/13/2020] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Clonorchiasis, caused by the fish-borne trematode Clonorchis sinensis, is a neglected tropical disease and a public health issue in endemic countries. In Vietnam, an in-depth analysis of risk factors for the condition is missing up to now. This study aimed to determine the prevalence of C. sinensis infection and associated risk factors in rural communities in northern Vietnam. METHODOLOGY/PRINCIPAL FINDINGS A cross-sectional survey was conducted in 4 communes in Yen Bai and Thanh Hoa provinces where clonorchiasis is known to be present and raw fish consumption is a common. Using a simple random sampling approach, stool was collected from 841 participants over 6 years old for coprological examination, and a questionnaire measured knowledge, attitudes, and practices with regard to clonorchiasis in 757 participants over 15 years old. Univariable and multivariable logistic regression models were run to identify risk factors for infection with C. sinensis. The overall prevalence of C. sinensis infection was 40.4%, with commune prevalences ranging between 26.5% and 53.3%. In the final model, males were significantly more likely to be infected with C. sinensis (OR 2.00; 95% CI 1.31-3.05). Recent (i.e. last year) consumption of raw fish (OR 8.00, 95% CI 4.78-13.36), low education level (OR 5.57; 95% CI 2.37-13.07), lack of treatment (OR 1.82, 95% CI 1.15-2.89), being between 19 to 39 years old (OR 6.46; 95% CI 1.25-33.37), and the presence of an unhygienic toilet (OR 2.74, 95% CI 1.53-4.92) were significantly associated with C. sinensis infection. CONCLUSION/SIGNIFICANCE This study demonstrated a high prevalence of C. sinensis infection in rural communities in northern Vietnam. Thus, control measures including, mass drug administration for those communes should be applied to reduce the prevalence. Moreover, specific health education activities should be developed for risk groups in C. sinensis endemic areas.
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Affiliation(s)
- Thao T. B. Nguyen
- School of public health, Université Libre de Bruxelles (ULB), Brussels, Belgium
- Center for Public health and Ecosystem Research, Hanoi University of Public Health, Hanoi, Vietnam
| | - Veronique Dermauw
- Department of Biomedical Sciences, Institute of Tropical Medicine Antwerp, Belgium
| | - Hafid Dahma
- Department of Microbiology, LHUB—ULB, Groupement Hospitalier Universitaire de Bruxelles (GHUB), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Dung Thi Bui
- Department of Parasitology, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Faculty of Ecology and Biological Resources, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Trang T. H. Le
- Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Ngan T. T. Phi
- Faculty of Science and Technology, University of Twente, Enschede, Netherlands
| | - Laetitia Lempereur
- Laboratory of Parasitology and Parasitic Diseases, Faculty of Veterinary Medicine, Université de Liège, Liège, Belgium
| | - Bertrand Losson
- Laboratory of Parasitology and Parasitic Diseases, Faculty of Veterinary Medicine, Université de Liège, Liège, Belgium
| | - Olivier Vandenberg
- Center for Environmental Health and Occupational Health, School of Public Health, Université Libre de Bruxelles (ULB), Brussels, Belgium
- Innovation and Business Development Unit, LHUB—ULB, Groupement Hospitalier Universitaire de Bruxelles (GHUB), Université Libre de Bruxelles (ULB), Brussels, Belgium
- Division of Infection and Immunity, Faculty of Medical Sciences, University College London, London, United Kingdom
| | - Dung Trung Do
- Department of Parasitology, National Institute of Malariology, Parasitology and Entomology, Hanoi, Vietnam
| | - Pierre Dorny
- Department of Biomedical Sciences, Institute of Tropical Medicine Antwerp, Belgium
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22
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Kopolrat K, Sithithaworn P, Kiatsopit N, Namsanor J, Laoprom N, Tesana S, Andrews RH, Petney TN. Influence of Water Irrigation Schemes and Seasonality on Transmission Dynamics of Opisthorchis viverrini in the Snail Intermediate Host, Bithynia siamensis goniomphalos in Rice Paddy Fields in Northeast Thailand. Am J Trop Med Hyg 2020; 103:276-286. [PMID: 32394873 DOI: 10.4269/ajtmh.19-0290] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Opisthorchis viverrini is a fish-borne zoonotic trematode that causes significant public health problems in Southeast Asia. Its life cycle requires Bithynia snails as the first intermediate hosts, fish, and human and/or carnivore hosts. This study assessed impacts of land use practice for rice cultivation and seasonality on the transmission dynamics of O. viverrini in Bithynia siamensis goniomphalos in rice paddy field habitats. The transmission of O. viverrini cercariae in B. s. goniomphalos was monitored at monthly intervals over a 4-year period from January 2010 to December 2013. From a total of 59,727 snails examined by standard cercarial shedding, the prevalence of O. viverrini was 0.7% (range, 0.0-4.1%). The prevalence of O. viverrini infection in B. s. goniomphalos varied with the amount of rainfall, with peaks of infection occurring in the cool-dry season, that is, after each rainy season. A shift of peak prevalence from cool-dry to hot-dry season observed in 2013 was associated with the increase in preceding water irrigation to support the production of second annual rice crop. Significant positive correlations were found between the prevalence and intensity of cercarial infection and the size of snails. Our results revealed substantial variation between years so that to have a clear understanding of the population dynamics of this complex system, studies should be conducted over an extended period (> 1 year). Results from this study highlight that water irrigation schemes in rice paddy cultivation and seasonality have a significant effect on the prevalence of O. viverrini in B. s. goniomphalos.
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Affiliation(s)
- Kulthida Kopolrat
- Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Paiboon Sithithaworn
- Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Nadda Kiatsopit
- Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Jutamas Namsanor
- Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Nonglak Laoprom
- Department of Science, Faculty of Science and Engineering, Kasetsart University, Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon, Thailand
| | - Smarn Tesana
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Ross H Andrews
- Imperial College London, Faculty of Medicine, St Mary's Campus, London, United Kingdom.,Cholangiocarcinoma Screening and Care Program (CASCAP), Khon Kaen University, Thailand.,Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Trevor N Petney
- State Museum of Natural History Karlsruhe, Evolution and Paleontology, Karlsruhe, Germany.,Cholangiocarcinoma Screening and Care Program (CASCAP), Khon Kaen University, Thailand
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23
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Namsanor J, Kiatsopit N, Laha T, Andrews RH, Petney TN, Sithithaworn P. Infection Dynamics of Opisthorchis viverrini Metacercariae in Cyprinid Fishes from Two Endemic Areas in Thailand and Lao PDR. Am J Trop Med Hyg 2020; 102:110-116. [PMID: 31701859 DOI: 10.4269/ajtmh.19-0432] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The infection dynamics of Opisthorchis viverrini metacercariae was analyzed in cyprinid fish from endemic areas in Mukdahan Province, Thailand, and Khammouane Province, Lao PDR. The fish were collected during the cool-dry (November-February), hot-dry (March-May), and rainy (June-October) seasons in 2017. They were examined by the digestion method, and the infection status was statistically analyzed by study area, season, and fish size. The prevalence (no. of fish positive/no. of fish examined × 100) and metacercarial intensities (no. of metacercariae detected/no. of fish positive) of O. viverrini in both study areas depended on season, being high in the cool-dry season and varying in the hot-dry and rainy seasons. In Mukdahan Province, the average prevalence was 18.3% (range 11.0-46.7%, n = 420) and the intensity was 4.07 ± 5.86 cysts/fish (mean ± SD), whereas in Khammouane Province, the prevalence was 51.9% (range 9.1-70.6%, n = 673) and the intensity was 6.67 ± 12.88 cysts/fish. Among the cyprinid fish species examined, the infection was associated with fish body size and predominantly found in Hampala dispar (86.5%), Cyclocheilichthys armatus (73.2%), and Puntius brevis (42.7%). The distribution of O. viverrini metacercariae in fish was skewed, with most of the fish having a low worm burden with an average of four to six cysts/fish. The findings that seasonality, sampling locality, fish size, and species of fish play roles in the risk of O. viverrini infection imply that these host and environmental factors are important for the transmission dynamics and control of O. viverrini.
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Affiliation(s)
- Jutamas Namsanor
- Faculty of Medicine, Cholangiocarcinoma Research Institute (CARI), Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Nadda Kiatsopit
- Faculty of Medicine, Cholangiocarcinoma Research Institute (CARI), Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Thewarach Laha
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Ross H Andrews
- Faculty of Medicine, Imperial College London, London, United Kingdom.,Faculty of Medicine, Cholangiocarcinoma Research Institute (CARI), Khon Kaen University, Khon Kaen, Thailand
| | - Trevor N Petney
- Evolution and Paleontology, State Museum of Natural History Karlsruhe, Karlsruhe, Germany.,Faculty of Medicine, Cholangiocarcinoma Research Institute (CARI), Khon Kaen University, Khon Kaen, Thailand
| | - Paiboon Sithithaworn
- Faculty of Medicine, Cholangiocarcinoma Research Institute (CARI), Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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24
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Labony SS, Alim MA, Hasan MM, Hossain MS, Islam A, Alam MZ, Tsuji N, Anisuzzaman. Fish-borne trematode infections in wild fishes in Bangladesh. Pathog Glob Health 2020; 114:91-98. [PMID: 32054421 DOI: 10.1080/20477724.2020.1727217] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Fish-borne liver and intestinal flukes are helminth pathogens that have a negative impact on public health worldwide. We herein investigated the status of infection by the metacercariae (MC) of fish-borne trematodes (FBTs) in randomly selected freshwater wild fishes. Five species of fishes were collected and digested artificially using digestion fluid to recover MC. All fish species, namely, ticto barb (Puntius ticto) (14/16, 87.5%), banded gourami (Colisa fasciata) (8/12, 66.7%), freshwater garfish (Xenentodon cancila) (9/14, 64.3%), flying barb (Esomus danricus) (5/12, 41.7%), and reba carp (Cirrhinus reba) (7/11, 63.7%), were infected with FBTs. The overall infection rate was 66.2% and the mean intensity was 748.3 ± 2947.5 MC/100 g of fishes. The loads of MC in ticto barb, reba carp, freshwater garfish, banded gourami, and flying barb per 100 g of fishes were 1978.8 ± 5053.7, 268.3 ± 440.7, 140 ± 105.4, 134.3 ± 109.2, and 117.6 ± 102.3, respectively. The infection rate was significantly higher (P < 0.05) in the body (55.4%) than in the head (40%) of fishes. Morphological and morphometrical analyzes identified the MC of Clonorchis spp., Opisthorchis spp., Metorchis spp., Metagonimus spp., and Echinostoma spp. Collectively, the present results suggest that wild freshwater fishes are important intermediate hosts for FBTs, and play a critical role in the transmission cycle of these parasites in Bangladesh. The results also indicate that people of the country are at risk of these infections.
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Affiliation(s)
- Sharmin S Labony
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - M Abdul Alim
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Muhammad Mehedi Hasan
- Department of Fisheries Technology, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md Shahadat Hossain
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Ausraful Islam
- Program for Emerging Infections, Infectious Diseases Division, icddr,b, Dhaka, Bangladesh
| | - Mohammad Zahangir Alam
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Naotoshi Tsuji
- Department of Parasitology and Tropical Medicine, Kitasato University School of Medicine, Sagamihara, Japan
| | - Anisuzzaman
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
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25
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Expanded complement of Niemann-Pick type C2-like protein genes in Clonorchis sinensis suggests functions beyond sterol binding and transport. Parasit Vectors 2020; 13:38. [PMID: 31973758 PMCID: PMC6979364 DOI: 10.1186/s13071-020-3910-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 01/15/2020] [Indexed: 01/04/2023] Open
Abstract
Background The parasitic flatworm Clonorchis sinensis inhabits the biliary tree of humans and other piscivorous mammals. This parasite can survive and thrive in the bile duct, despite exposure to bile constituents and host immune attack. Although the precise biological mechanisms underlying this adaptation are unknown, previous work indicated that Niemann-pick type C2 (NPC2)-like sterol-binding proteins might be integral in the host-parasite interplay. Expansions of this family in some invertebrates, such as arthropods, have shown functional diversification, including novel forms of chemoreception. Thus, here we curated the NPC2-like protein gene complement in C. sinensis, and predicted their conserved and/or divergent functional roles. Methods We used an established comparative genomic-bioinformatic approach to curate NPC2-like proteins encoded in published genomes of Korean and Chinese isolates of C. sinensis. Protein sequence and structural homology, presence of conserved domains and phylogeny were used to group and functionally classify NPC2-like proteins. Furthermore, transcription levels of NPC2-like protein-encoding genes were explored in different developmental stages and tissues. Results Totals of 35 and 32 C. sinensis NPC2-like proteins were predicted to be encoded in the genomes of the Korean and Chinese isolates, respectively. Overall, these proteins had low sequence homology and high variability of sequence alignment coverage when compared with curated NPC2s. Most C. sinensis proteins were predicted to retain a conserved ML domain and a conserved fold conformation, with a large cavity within the protein. Only one protein sequence retained the conserved amino acid residues required in bovine NPC2 to bind cholesterol. Non-canonical C. sinensis NPC2-like protein-coding domains clustered into four distinct phylogenetic groups with members of a group frequently encoded on the same genome scaffolds. Interestingly, NPC2-like protein-encoding genes were predicted to be variably transcribed in different developmental stages and adult tissues, with most being transcribed in the metacercarial stage. Conclusions The results of the present investigation confirms an expansion of NPC2-like proteins in C. sinensis, suggesting a diverse array of functions beyond sterol binding and transport. Functional explorations of this protein family should elucidate the mechanisms enabling the establishment and survival of C. sinensis and related flukes in the biliary systems of mammalian hosts.![]()
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26
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Suwannatrai K, Suwannatrai AT, Loukas A, Sotillo J. Recent advances on the immunobiology of Bithynia spp. hosts of Opisthorchis viverrini. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 102:103460. [PMID: 31381930 DOI: 10.1016/j.dci.2019.103460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 07/16/2019] [Accepted: 07/27/2019] [Indexed: 06/10/2023]
Abstract
This article reviews the past and present scientific reports regarding Bithynia spp. focusing on the biology, ecology and life cycle of Bithynia snails and their responses to Opisthorchis viverrini infection. Moreover, new data regarding comparative molecular genomics and proteomic approaches have recently revealed novel molecular components involved in the immune defence responses from Bithynia spp., providing additional perspectives for future studies. Studies on the specific interaction between Bithynia snails and their trematodes will contribute to further understanding the snail-parasite relationship with regards to epidemiology and control of Opisthorchiasis and broaden the scope on comparative immunology of gastropod snails.
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Affiliation(s)
- Kulwadee Suwannatrai
- Department of Biology, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon, Thailand
| | | | - Alex Loukas
- Centre for Molecular Therapeutics, Australian Institute for Tropical Health and Medicine, James Cook University, Cairns, Queensland, Australia
| | - Javier Sotillo
- Centre for Molecular Therapeutics, Australian Institute for Tropical Health and Medicine, James Cook University, Cairns, Queensland, Australia; Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain.
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27
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Najjari M, Karimazar MR, Rezaeian S, Ebrahimipour M, Faridi A. Prevalence and economic impact of cystic echinococcosis and liver fluke infections in slaughtered sheep and goat in north-central Iran, 2008-2018. J Parasit Dis 2019; 44:17-24. [PMID: 32174701 DOI: 10.1007/s12639-019-01156-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 08/29/2019] [Indexed: 01/23/2023] Open
Abstract
Cystic echinococcosis (CE) and liver fluke infections as important zoonotic infections impose a large socioeconomic impact on societies. As an endemic region for these infections, slaughterhouse inspections should be more considered in Iran. This study aimed to analyze the 11-year record of offal condemnation due to CE, fascioliasis, dicrocoeliasis infections in sheep and goat and its economic impact at Alborz slaughterhouse, north-central Iran. The prevalence rate was calculated as the infected organs (as nominator) divided by the slaughtered cases (as the denominator) in each year and month. The annual percent changes was used to determine trends of parasitic diseases over time. The relationship between metrological indexes and the prevalence of parasitic diseases was determined by the linear regression model. Statistical analyses were done using STATA software 14. For an estimate, the economic impact, the total numbers of offal condemnation were calculated. The overall prevalence rate of fascioliasis, dicrocoeliasis, and CE was 0.95%, 2.17%, and 12.74%, respectively. There was a declining trend in the prevalence of fascioliasis and dicrocoeliasis, whereas, the prevalence of CE increased from 7.57% in 2008 to 9.53% in 2018, representing an annual change of + 0.02%. The direct economic impact was estimated at US$ 1,670,977 and US$ 25,148 for liver and lung, respectively. The number of condemned organs due to these infections is noticeable in Alborz Province, north-central, Iran. The high economic impact of these infections showed the necessity of implementing a continuously infected animal's trace-back and disease control in the site of infection.
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Affiliation(s)
- M Najjari
- 1Department of Parasitology and Mycology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - M R Karimazar
- 2Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Fars Iran.,3Savojbolagh Health Center, Alborz University of Medical Sciences, Karaj, Alborz Iran
| | - S Rezaeian
- 4Infectious Diseases Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - M Ebrahimipour
- 5Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
| | - A Faridi
- 6Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran
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28
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Muthukumar R, Suttiprapa S, Mairiang E, Kessomboon P, Laha T, Smith JF, Sripa B. Effects of Opisthorchis viverrini infection on glucose and lipid profiles in human hosts: A cross-sectional and prospective follow-up study from Thailand. Parasitol Int 2019; 75:102000. [PMID: 31669292 DOI: 10.1016/j.parint.2019.102000] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 10/15/2019] [Accepted: 10/18/2019] [Indexed: 12/29/2022]
Abstract
Opisthorchis viverrini (OV) infection is endemic to the Northeast Thailand where the prevalence of Type 2 Diabetes mellitus (T2DM) is higher whilst the incidence of cardiovascular diseases (CVDs) is lower than the rest of Thailand. Helminth infection has both nutritional and immunological impact on their definitive hosts. Thus, a cross-sectional study was performed to see the effects of OV infection on glucose and lipid profiles. For this purpose, 200 each of OV infected and uninfected residents were recruited and their glycated hemoglobin (HbA1c), total cholesterol, triglycerides, low- and high-density lipoproteins (LDL and HDL) levels and anthropometric measurements, including BMI were examined. Then, as the prospective follow- up study, changes of those metabolic parameters of OV positive subjects (n = 120) before and after Praziquantel (PZQ) treatment were monitored for six months. The results showed that OV infection has a protective effect against hyperglycemia (OR 0.482 and p = .04) and metabolic disease risk group (OR 0.478 and p = .03). OV positive participants had lower HbA1c (5.5% Vs. 6.01%, p = .001) but higher HDL (54.07 Vs. 49.46 mg/dL, p = .001) than OV negative participants that are statistically significant. After PZQ treatment for OV-positive subjects, their serum levels of HbA1c (p < .05) and HDL (p < .05) significantly rose during the follow up. Apparently, OV infection lowers HbA1c but increases HDL in definitive human hosts.
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Affiliation(s)
- Radhakrishnan Muthukumar
- Graduate School, Khon Kaen University, Khon Kaen, Thailand; WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Centre, Khon Kaen University, Khon Kaen, Thailand
| | - Sutas Suttiprapa
- WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Centre, Khon Kaen University, Khon Kaen, Thailand; Tropical Medicine Graduate Program, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Eimorn Mairiang
- Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Pattapong Kessomboon
- Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Thewarach Laha
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - John F Smith
- Faculty of Public Health, Khon Kaen University, Khon Kaen, Thailand
| | - Banchob Sripa
- WHO Collaborating Centre for Research and Control of Opisthorchiasis (Southeast Asian Liver Fluke Disease), Tropical Disease Research Centre, Khon Kaen University, Khon Kaen, Thailand; Tropical Medicine Graduate Program, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand; Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
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29
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Hong JH, Oh CS, Chai JY, Seo M, Shin DH. Cytochrome C Oxidase Subunit 1, Internal Transcribed Spacer 1, Nicotinamide Adenine Dinucleotide Hydrogen Dehydrogenase Subunits 2 and 5 of Clonorchis sinensis Ancient DNA Retrieved from Joseon Dynasty Mummy Specimens. J Korean Med Sci 2019; 34:e149. [PMID: 31124326 PMCID: PMC6535405 DOI: 10.3346/jkms.2019.34.e149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 05/06/2019] [Indexed: 01/05/2023] Open
Abstract
We analyzed Clonorchis sinensis ancient DNA (aDNA) acquired from the specimens of the Joseon mummies. The target regions were cytochrome C oxidase subunit 1 (CO1), internal transcribed spacer 1 (ITS1), nicotinamide adenine dinucleotide hydrogen (NADH) dehydrogenase subunits 2 (NAD2) and 5 (NAD5). The sequences of C. sinensis aDNA was completely or almost identical to modern C. sinensis sequences in GenBank. We also found that ITS1, NAD2 and NAD5 could be good markers for molecular diagnosis between C. sinensis and the other trematode parasite species. The current result could improve our knowledge about genetic history of C. sinensis.
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Affiliation(s)
- Jong Ha Hong
- Laboratory of Bioanthropology, Paleopathology and History of Diseases, Seoul National University College of Medicine, Seoul, Korea
| | - Chang Seok Oh
- Laboratory of Bioanthropology, Paleopathology and History of Diseases, Seoul National University College of Medicine, Seoul, Korea
- Institute of Forensic Science, Seoul National University College of Medicine, Seoul, Korea
| | - Jong Yil Chai
- Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul, Korea
- Institute of Parasitic Diseases, Korean Association of Health Promotion, Seoul, Korea
| | - Min Seo
- Department of Parasitology, Dankook University College of Medicine, Cheonan, Korea.
| | - Dong Hoon Shin
- Laboratory of Bioanthropology, Paleopathology and History of Diseases, Seoul National University College of Medicine, Seoul, Korea
- Institute of Forensic Science, Seoul National University College of Medicine, Seoul, Korea.
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Pratumchart K, Suwannatrai K, Sereewong C, Thinkhamrop K, Chaiyos J, Boonmars T, Suwannatrai AT. Ecological Niche Model based on Maximum Entropy for mapping distribution of Bithynia siamensis goniomphalos, first intermediate host snail of Opisthorchis viverrini in Thailand. Acta Trop 2019; 193:183-191. [PMID: 30849302 DOI: 10.1016/j.actatropica.2019.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/04/2019] [Accepted: 03/03/2019] [Indexed: 12/21/2022]
Abstract
The snail Bithynia siamensis goniomphalos acts as first intermediate host of the liver fluke, Opisthorchis viverrini, which causes opisthorchiasis in humans. In this study, we used a geographic information system (GIS), remote sensing (RS) and software using the maximum entropy (MaxEnt) algorithm to predict the distribution of B. s. goniomphalos in Thailand on the basis of environmental and climatic factors. The MaxEnt model for B. s. goniomphalos was excellent, with average test AUC values of 0.89. The predicted distribution of B. s. goniomphalos was affected by altitude, land cover, normalized difference vegetation index (NDVI), precipitation in the driest month (BIO 14), land surface temperature (LST) and soil pH. The areas suitable for B. s. goniomphalos were mostly in Northeast Thailand and some northern parts of the country. The presence of B. s. goniomphalos decreases with increasing altitude and increasing NDVI value. Bithynia s. goniomphalos is most likely to occur in paddy fields and cropland. Opisthorchiasis prevalence was directly proportional to the likelihood of snail occurrence as predicted by the model. This is the first time this ecological niche model has been used to predict Bithynia snail distribution and hence to provide a basis for future work of opisthorchiasis prevention in opisthorchiasis-endemic countries.
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Boueroy P, Duenngai K, Eamudomkarn C, Sripan P, Boonmars T, Pumhirunroj B, Artchayasawat A, Songsri J, Chomphumee K, Rattanasuwan P, Laummaunwai P, Khueangchiangkhwang S, Boonjaraspinyo S. Effect of Temperature on the Killing of Opisthorchis viverrini Eggs In Vitro. THE KOREAN JOURNAL OF PARASITOLOGY 2019; 57:49-53. [PMID: 30840800 PMCID: PMC6409225 DOI: 10.3347/kjp.2019.57.1.49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 01/13/2019] [Indexed: 11/25/2022]
Abstract
Contaminated liver fluke egg in the environment has led to the high prevalence of human opisthorchiasis associated with cholangiocarcinoma in Southeast Asia. To find the effective lessening methods of Opisthorchis viverrini eggs in the contaminated environment, we investigated the temperature conditions for killing of these trematode eggs in vitro. Numerous O. viverrini eggs were obtained in the proximal part of uteri of adult worms from experimental hamsters. Mature eggs with miracidium were allocated by experimental groups (2 control: positive and negative and 4 treatment: 50, 60, 70, and 80°C) with 0.85% saline, and treated by the experimental plan. Eggs in each experimental groups were observed under the confocal microscope after stain with Propidium Iodide (PI) to evaluate the effect of temperatures. Eggs in 70 and 80°C groups were all killed after over 10 min heated. Majority of eggs in 60°C (10, 15, and 30 min heated), 70 and 80°C (5 min heated) groups were inactivated. However in 50°C group, below half of eggs were to be killed in all time lapse (10, 15 and 30 min). In order to prevent O. viverrini infection and cholangiocarcinoma, direct treatment of sewage by heating at 70 or 80°C at least 10 min is essential. Therefore, treatment of O. viverrini eggs at a high temperature is a potential method for controlling egg contamination in sewage.
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Affiliation(s)
- Parichart Boueroy
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kunyarat Duenngai
- Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand.,Department of Public Health, Faculty of Science and Technology, Phetchabun Rajabhat University, Phetchabun 67000, Thailand
| | - Chatanun Eamudomkarn
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Panupan Sripan
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Thidarut Boonmars
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Benjamabhorn Pumhirunroj
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Atchara Artchayasawat
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Jiraporn Songsri
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kanpicha Chomphumee
- Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Panaratana Rattanasuwan
- Department of Anesthesiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Porntip Laummaunwai
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sukhonthip Khueangchiangkhwang
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Neglected, zoonosis, and vector-borne disease group, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.,Liver Fluke and Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sirintip Boonjaraspinyo
- Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
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Khieu V, Fürst T, Miyamoto K, Yong TS, Chai JY, Huy R, Muth S, Odermatt P. Is Opisthorchis viverrini Emerging in Cambodia? ADVANCES IN PARASITOLOGY 2019; 103:31-73. [PMID: 30878058 DOI: 10.1016/bs.apar.2019.02.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Opisthorchis viverrini infection is widely prevalent in Southeast Asia. In Cambodia information on this helminth infection is scare. Recent reports suggest that O. viverrini is an emerging public health problem. We aimed to synthesize all information in relation to the infection, epidemiology, and morbidity of O. viverrini in Cambodia; from published as well as thus far unpublished sources. First reports on O. viverrini date back to 1995. In 2006 an O. viverrini initiative was launched by the national helminth control program. Since then O. viverrini has been reported in all - except two - provinces. Villages with high prevalences (>20%) were found in provinces from Preah Vihear to Takeo. The infection has a highly focal distribution. In many villages no infections were detected. O. viverrini infection was also reported in cats, dogs and intermediate hosts. No report on morbidity associated with O. viverrini was found. The current evidence suggests that O. viverrini infection remains underreported in Cambodia. It is likely that the transmission will further increase in the future with potentially serious consequences for human health.
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Affiliation(s)
- Virak Khieu
- National Center for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Thomas Fürst
- Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland; School of Public Health, Imperial College London, London, United Kingdom
| | - Kazuko Miyamoto
- School of Nursing, Faculty of Medicine & Center for International Education and Exchange, Yamanashi University, Yamanashi, Japan
| | - Tai-Soon Yong
- Department of Environmental Biology, Institute of Tropical Medicine, and Arthropods of Medical Importance Resource Bank, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jong-Yil Chai
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul, Republic of Korea; Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Rekol Huy
- National Center for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Sinuon Muth
- National Center for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia
| | - Peter Odermatt
- Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland
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Suwannahitatorn P, Webster J, Riley S, Mungthin M, Donnelly CA. Uncooked fish consumption among those at risk of Opisthorchis viverrini infection in central Thailand. PLoS One 2019; 14:e0211540. [PMID: 30703149 PMCID: PMC6355008 DOI: 10.1371/journal.pone.0211540] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 01/16/2019] [Indexed: 11/30/2022] Open
Abstract
In contrast to northern and northeastern Thailand, central Thailand was believed not to be endemic for Opisthorchis viverrini (OV). Fieldwork conducted in a rural area of central Thailand revealed that the prevalence and incidence were relatively high compared with regional average data. We hypothesized that the behavioural-psycho-social background of the study population might play an important role in the high burden of the infection. As a result, a qualitative study was conducted to highlight potential social determinants of the infection dynamics to gain greater understanding of the risk behaviours and their contexts. A qualitative study using focus group discussion and in-depth interviews was conducted in Na-ngam Village, Chachoengsao Province from 2012-14. Framework analysis was used to explore associations between infection and thematic content. Social influence showed a strong impact on infection dynamics of OV infection. Our results revealed that Koi pla (chopped raw fish salad) remains a popular dish in the community, as the dish itself represents northeastern culture. The cultural norm had been transferred from ancestors to their descendants. Some elders complained that discontinuing the consumption of Koi pla went against old traditions with respect to cultural norms and socialization. In contrast, modern education teaches about hygiene including OV infection risks, and accordingly teenagers and young adults were reported to modify their lifestyles including their eating habits. Children are a potential key to pass knowledge to their parents and school-based education programs can serve as a practical hub for knowledge dissemination. However, health education alone might not lead to behavioural change in other age groups. Therefore, more efforts are needed to support the transformation.
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Affiliation(s)
| | - Joanne Webster
- Centre for Emerging, Endemic and Exotic Diseases (CEEED), Department of Pathology and Pathogen Biology, Royal Veterinary College, University of London, London, United Kingdom
| | - Steven Riley
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Mathirut Mungthin
- Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Christl A. Donnelly
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
- Department of Statistics, University of Oxford, Oxford, United Kingdom
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Chai JY, Jung BK. Epidemiology of Trematode Infections: An Update. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1154:359-409. [PMID: 31297768 DOI: 10.1007/978-3-030-18616-6_12] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Digenetic trematodes infecting humans are more than 91 species which belong to 46 genera all over the world. According to their habitat in definitive hosts, they are classified as blood flukes (Schistosoma japonicum. S. mekongi, S. mansoni, S. haematobium, and S. intercalatum), liver flukes (Clonorchis sinensis, Opisthorchis viverrini, O. felineus, Metorchis conjunctus, M. bilis, M. orientalis, Fasciola hepatica, F. gigantica, Dicrocoelium dendriticum, and D. hospes), lung flukes (Paragonimus westermani, P. heterotremus, P. skrjabini, P. miyazakii, P. kellicoti, P. mexicanus, P. africanus, and P. uterobilateralis), throat fluke (Clinostomum complanatum), pancreatic fluke (Eurytrema pancreaticum), and intestinal flukes (Metagonimus yokogawai, M. miyatai, M. takahashii, Heterophyes nocens, H. heterophyes, Haplorchis taichui, H. pumilio, H. yokogawai, Centrocestus formosanus, Echinostoma revolutum, E. ilocanum, Isthmiophora hortensis, Echinochasmus japonicus, E. lilliputanus, Artyfechinostomum malayanum, A. sufrartyfex, A. oraoni, Fasciolopsis buski, Gymnophalloides seoi, Neodiplostomum seoulense, Caprimolgorchis molenkampi, Phaneropsolus bonnei, and Plagiorchis muris). The mode of transmission to humans includes contact with cercariae contaminated in water (schistosomes) and ingestion of raw or improperly cooked fish (liver and throat flukes, heterophyids, and echinostomes), snails (echinostomes and gymnophallids), amphibia, reptiles (neodiplostomes), aquatic vegetables (amphistomes), or insect larvae or adults (plagiorchiids, lecithodendriids, and pancreatic fluke). Praziquantel has been proved to be highly effective against most species of trematode infections except fascioliasis. Epidemiological surveys and detection of human infections are required for better understanding of the geographical distribution and endemicity of each trematode species.
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Affiliation(s)
- Jong-Yil Chai
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul, Republic of Korea.
- Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Bong-Kwang Jung
- Institute of Parasitic Diseases, Korea Association of Health Promotion, Seoul, Republic of Korea
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Saijuntha W, Sithithaworn P, Kiatsopit N, Andrews RH, Petney TN. Liver Flukes: Clonorchis and Opisthorchis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1154:139-180. [PMID: 31297762 DOI: 10.1007/978-3-030-18616-6_6] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Clonorchis sinensis, Opisthorchis viverrini, and O. felineus are liver flukes of human and animal pathogens occurring across much of Europe and Asia. Nevertheless, they are often underestimated compared to other, better known neglected diseases in spite of the fact that many millions of people are infected and hundreds of millions are at risk. This is possibly because of the chronic nature of the infection and disease and that it takes several decades prior to a life-threatening pathology to develop. Several studies in the past decade have provided more information on the molecular biology of the liver flukes which clearly lead to better understanding of parasite biology, systematics, and population genetics. Clonorchiasis and opisthorchiasis are characterized by a chronic infection that induces hepatobiliary inflammation, especially periductal fibrosis, which can be detected by ultrasonography. These chronic inflammations eventually lead to cholangiocarcinoma (CCA), a usually fatal bile duct cancer that develops in some infected individuals. In Thailand alone, opisthorchiasis-associated CCA kills up to 20,000 people every year and is therefore of substantial public health importance. Its socioeconomic impacts on impoverished families and communities are considerable. To reduce hepatobiliary morbidity and CCA, the primary intervention measures focus on control and elimination of the liver fluke. Accurate diagnosis of liver fluke infections in both human and other mammalian, snail and fish intermediate hosts, are important for achieving these goals. While the short-term goal of liver fluke control can be achieved by praziquantel chemotherapy, a comprehensive health education package targeting school children is believed to be more beneficial for a long-term goal/solution. It is recommended that a transdisciplinary research or multisectoral control approach including one health and/or eco health intervention strategy should be applied to combat the liver flukes, and hence contribute to reduction of cholangiocarcinoma in endemic areas.
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Affiliation(s)
- Weerachai Saijuntha
- Walai Rukhavej Botanical Research Institute, Mahasarakham University, Maha Sarakham, Thailand
| | - Paiboon Sithithaworn
- Department of Parasitology, Faculty of Medicine, Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.
| | - Nadda Kiatsopit
- Department of Parasitology, Faculty of Medicine, Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
| | - Ross H Andrews
- CASCAP, Faculty of Medicine, Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Faculty of Medicine, St Mary's Campus, Imperial College London, London, UK
| | - Trevor N Petney
- CASCAP, Faculty of Medicine, Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Paleontology and Evolution, State Museum of Natural History, Karlsruhe, Germany
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Odds, challenges and new approaches in the control of helminthiasis, an Asian study. Parasite Epidemiol Control 2018; 4:e00083. [PMID: 30662968 PMCID: PMC6324018 DOI: 10.1016/j.parepi.2018.e00083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 12/20/2018] [Accepted: 12/20/2018] [Indexed: 12/15/2022] Open
Abstract
The time is passing, and the worms are still a major struggle for local people in Asian countries, especially the less empowered and in a situation of social vulnerability. We are working in the field in Laos, Thailand, and the Philippines where the usual control programs based only on human treatment are partially effective. Areas with mass drug administration could diminish, but not eliminate STHs of endemic areas. The persistence of helminthic NTDs in the environment and animal hosts makes the eradication a very difficult task. Great changes in the landscapes of endemic areas, such as construction of dams, can change the fauna and the lifestyle of local people. Those changes can improve infrastructure, but it can also lead to social vulnerability. The challenge, then, is to conceive new and directed control programs for helminthiasis based on multi- and transdisciplinary approaches diminishing the health gap in a globalized world. In this short review, we summarize the actual scenario concerning the main helminths in Southeast Asia and how an environmental DNA approach and the use of GIS could contribute to surveillance and control programs.
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Calvopina M, Romero-Alvarez D, Diaz F, Cevallos W, Sugiyama H. A comparison of Kato-Katz technique to three other methods for diagnosis of Amphimerus spp. liver fluke infection and the prevalence of infection in Chachi Amerindians of Ecuador. PLoS One 2018; 13:e0203811. [PMID: 30286114 PMCID: PMC6171820 DOI: 10.1371/journal.pone.0203811] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 08/28/2018] [Indexed: 01/05/2023] Open
Abstract
Background Recently, a high prevalence of infection by the liver fluke Amphimerus spp. has been documented in the Chachi Amerindians of Ecuador. For diagnosis, no studies exist that compare the sensitivity of different coproparasitological detection techniques. The present study compares the Kato-Katz technique with three other coproparasitological methods for detecting eggs of Amphimerus in stools, as well as determines the prevalence of infection in Chachi residents in a Tropical rain forest area in the northwest coast of Ecuador. Methodology/Results A total of 105 samples, utilizing the Kato-Katz technique (KK), the spontaneous sedimentation technique in tube (SSTT), the formalin-ether concentration technique (FEC), and direct smear microscopy (DM), were examined. Combining the four methods (fixed “gold” standard), 38 samples were positive with a prevalence of infection of 36.2%. The sensitivities of individual methods were 71%, 58%, 50% and 3% for KK, SSTT, FEC, and DM respectively. Our results indicated that KK alone had the best performance, detecting 27 (71%) of the 38 positive samples. The combination of KK and SSTT detected amphimeriasis in 36 (95%) samples, and KK and FEC in 31 (82%) samples. Conclusions DM showed the lowest sensitivity, which raises concern for its value, because it is the standard technique for stool examination for detection of parasites in both public and private laboratories in Ecuador. SSTT alone detected eggs in 22 samples (58%) and would be recommended for field studies because of its simplicity. Performing two techniques on a single sample enhances the detection of Amphimerus infection. Its sensitivity is relative to a fixed “gold” standard, determined as the combined results of the four techniques performed. This study confirms the high prevalence of human infection by Amphimerus in the indigenous Chachi group where the first human cases were described.
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Affiliation(s)
- Manuel Calvopina
- OneHealth Group, Carrera de Medicina, Facultad de Ciencias de la Salud, Universidad De Las Américas (UDLA), Quito, Ecuador
- * E-mail: ,
| | - Daniel Romero-Alvarez
- Department of Ecology and Evolutionary Biology – Biodiversity Institute, University of Kansas, Lawrence, Kansas, United States of America
| | - Fernanda Diaz
- Carrera de Medicina, Universidad Central del Ecuador, Quito, Ecuador
| | - William Cevallos
- Carrera de Medicina, Universidad Central del Ecuador, Quito, Ecuador
| | - Hiromu Sugiyama
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan
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Panithanang B, Srithongklang W, Kompor P, Pengsaa P, Kaewpitoon N, Wakkhuwattapong P, Kaewpitoon SJ. The Effect of Health Behavior Modification Program for Liver Fluke Prevention among the Risk Group in Rural Communities, Thailand. Asian Pac J Cancer Prev 2018; 19:2673-2680. [PMID: 30256569 PMCID: PMC6249471 DOI: 10.22034/apjcp.2018.19.9.2673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/13/2018] [Indexed: 01/23/2023] Open
Abstract
This quasi-experimental research aimed to study the effect of health behavior modification program in relation to knowledge, self-efficacy, expectation, and practice for liver fluke prevention among the risk group from Bueng Samrong sub-district, Kaeng Sanam Nang district, Nakhon Ratchasima province, Northeast Thailand. The total of 66 participants was assigned to experimental and comparison group, 33 participants in each group, 12-weeks intervene period. The experimental group was received health behavioral modification programs based on health education, self-efficacy, motivation, social support and networking. Pre-and-post-tests were measured using predesigned questionnaires. The comparative analysis was analyzed by paired sample t-test and independent sample t-test at the 0.05 level of significance. The results revealed that the experimental group had significantly greater knowledge, self-efficacy, expectation, and practice for liver fluke prevention than those in the comparison group (p < 0.05). In conclusion, this was a successful health education program for liver fluke avoidance. Participants were gained the correct knowledge and had the higher self-efficacy, expectation, and practice regrading liver fluke prevention. Therefore, it may useful for further behavior modification in the other epidemic areas.
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Affiliation(s)
- Benchapan Panithanang
- Parasitic Disease Research Center, Institute of Medicine, Suranaree University of Technology, Nakhon Ratchasima, Thailand
- Faculty of Public Health, Vongchavalitkul University, Nakhon Ratchasima, Thailand.
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Bürli C, Harbrecht H, Odermatt P, Sayasone S, Chitnis N. Analysis of interventions against the liver fluke, opisthorchis viverrini. Math Biosci 2018; 303:115-125. [DOI: 10.1016/j.mbs.2018.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 06/05/2018] [Accepted: 06/25/2018] [Indexed: 01/23/2023]
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40
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Kim HS, Kong JY, Kim JH, Yeon SC, Hong IH. A Case of Fascioliasis in A Wild Nutria, Myocastor coypus, in Republic of Korea. THE KOREAN JOURNAL OF PARASITOLOGY 2018; 56:375-378. [PMID: 30196671 PMCID: PMC6137294 DOI: 10.3347/kjp.2018.56.4.375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 08/01/2018] [Indexed: 01/23/2023]
Abstract
A total of 44 adult or juvenile nutrias were necropsied for disease survey. A large nodule was found in the liver of a nutria. The histopathological specimen of the hepatic nodule was microscopically examined, and sectional worms were found in the bile duct. The worms showed a tegument with spines, highly branches of vitelline glands and intestine. Finally, we histopathologically confirmed fascioliasis in a wild nutria. In the present study, a case of fascioliasis in a wild nutria is first confirmed in Korea.
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Affiliation(s)
- Hyo-Seok Kim
- Department of Veterinary Pathology, College of Veterinary Medicine, Gyeongsang National University, Jinju 52828, Korea
| | - Joo-Yeon Kong
- Department of Veterinary Pathology, College of Veterinary Medicine, Gyeongsang National University, Jinju 52828, Korea
| | - Jong-Hyun Kim
- Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Korea
| | - Seong-Chan Yeon
- Department of Wildlife Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Il-Hwa Hong
- Department of Veterinary Pathology, College of Veterinary Medicine, Gyeongsang National University, Jinju 52828, Korea.,Institute of Animal Medicine, Gyeongsang National University, Jinju 52828, Korea
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Improved genomic resources and new bioinformatic workflow for the carcinogenic parasite Clonorchis sinensis: Biotechnological implications. Biotechnol Adv 2018; 36:894-904. [DOI: 10.1016/j.biotechadv.2018.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/08/2018] [Accepted: 02/13/2018] [Indexed: 12/27/2022]
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Kiyan VS, Bulashev AK, Katokhin AV. Opisthorchis felineus and Metorchis bilis Metacercariae in Cyprinid Fish Leuciscus idus in Nura-Sarysu River, Kazakhstan. THE KOREAN JOURNAL OF PARASITOLOGY 2018; 56:267-274. [PMID: 29996630 PMCID: PMC6046553 DOI: 10.3347/kjp.2018.56.3.267] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 05/28/2018] [Indexed: 12/16/2022]
Abstract
Aim of the present study was to provide presence of opisthorchiid metacercariae in cyprinid fish Leuciscus idus in Nura-Sarysu river, Kazakhstan. Infection rate of the ides by the metacercariae was 42%. The metacercariae, similar morphologically to those of the liver flukes, were found: elliptical in shape, 0.19–0.25×0.15–0.22 mm, oral and ventral suckers nearly equal size, and excretory bladder O-shape with black content, occupying posterior part of the body. The metacercariae were divided into 2 groups with differences in size and thickness of cyst wall. Adult flukes were recovered from the Syrian hamsters infected with the opisthorch metacercariae and identified with morphological characters to Opisthorchis felineus and Metorchis bilis. DNA sequences of ITS1, ITS2, and cox1 supported the taxonomic assignment.
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Affiliation(s)
- Vladimir S Kiyan
- Department of Microbiology and Biotechnology, Saken Seifullin Kazakh Agrotechnical University, Astana, Kazakhstan
| | - Aitbay K Bulashev
- Department of Microbiology and Biotechnology, Saken Seifullin Kazakh Agrotechnical University, Astana, Kazakhstan
| | - Aleksey V Katokhin
- Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
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Khuntikeo N, Titapun A, Loilome W, Yongvanit P, Thinkhamrop B, Chamadol N, Boonmars T, Nethanomsak T, Andrews RH, Petney TN, Sithithaworn P. Current Perspectives on Opisthorchiasis Control and Cholangiocarcinoma Detection in Southeast Asia. Front Med (Lausanne) 2018; 5:117. [PMID: 29765958 PMCID: PMC5938629 DOI: 10.3389/fmed.2018.00117] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 04/06/2018] [Indexed: 02/06/2023] Open
Abstract
Similar to bile duct cancer or cholangiocarcinoma (CCA) in the western world, opisthorchiasis-associated CCA in Southeast Asia is an aggressive cancer with high mortality rates. It is known to cause a significant health burden in the opisthorchiasis region in Thailand and possibly throughout mainland Southeast. To reduce this health burden, a comprehensive prevention and control program for opisthorchiasis, as well as CCA, is required. In this review, our aim is to provide a brief update of the current situation regarding the natural history of opisthorchiasis and health burden of CCA in Southeast Asia. A comprehensive approach to tackling these issues being implemented in Thailand under the “Cholangiocarcinoma Screening and Care Program” is described. This comprehensive program consists of a three stage prevention and patient care program. The primary prevention component involves opisthorchiasis screening using a new and sensitive urine assay. The secondary prevention component involves screening for CCA and periductal fibrosis, with suspected CCA patients following the protocol for confirmation and appropriate treatment. Due to the eco-epidemiology of opisthorchiasis-induced CCA, the anticipated impacts and outcomes of the program include short-, medium-, and the long-term goals for the reduction of CCA incidence. To achieve long-term sustainable impacts, concerted efforts to raise social awareness and participating action by general public, non-government organizations, and government agencies are necessary. The strategic plans developed for this program can be expanded for use in other endemic areas as well as being a model for use in other chronic diseases.
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Affiliation(s)
- Narong Khuntikeo
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Attapol Titapun
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Watcharin Loilome
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Puangrat Yongvanit
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Cholangiocarcinoma Foundation, Khon Kaen University, Khon Kaen, Thailand
| | - Bandit Thinkhamrop
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Epidemiology and Biostatistics, Faculty of Public Health, Khon Kaen University, Khon Kaen, Thailand
| | - Nittaya Chamadol
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Thidarat Boonmars
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Teerachai Nethanomsak
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Curriculum and Instruction Program, Faculty of Education, Khon Kaen University, Khon Kaen, Thailand
| | - Ross H Andrews
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Faculty of Medicine, St Mary's Campus, Imperial College, London, United Kingdom
| | - Trevor N Petney
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Ecology and Parasitology, Institute of Zoology, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Paiboon Sithithaworn
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand.,Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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Pitaksakulrat O, Webster BL, Webster JP, Laha T, Saijuntha W, Lamberton PHL, Kiatsopit N, Andrews RH, Petney TN, Sithithaworn P. Phylogenetic relationships within the Opisthorchis viverrini species complex with specific analysis of O. viverrini sensu lato from Sakon Nakhon, Thailand by mitochondrial and nuclear DNA sequencing. INFECTION GENETICS AND EVOLUTION 2018; 62:86-94. [PMID: 29679744 DOI: 10.1016/j.meegid.2018.04.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/09/2018] [Accepted: 04/17/2018] [Indexed: 01/23/2023]
Abstract
The liver fluke Opisthorchis viverrini sensu lato causes serious public-health problems in Northeast Thailand and Southeast Asian countries. A hypothesis has been proposed that O. viverrini represents a species complex with varying levels of genetic differentiation in Thailand and Lao PDR. This study aimed to clarify whether O. viverrini populations can be genetically divided into separate taxa. We collected O. viverrini s.l. from eight different locations in Lao PDR and Thailand. The results of nad1, cox1, CF-int6, Pm-int9, ITS2 and 28S rDNA sequence analysis revealed that sub-structuring occurred between the eight populations. We found that O. viverrini s.l. from Sakon Nakhon (SK), Thailand, shows significant genetic differentiation (P < .05) from all other isolates from different localities in Thailand and Lao PDR. This was supported by haplotype and phylogenetic tree analyses in which the SK isolate was separated from all other isolates. This suggests that O. viverrini s.l. from SK is a cryptic species. The data, however, also confirm the association between genetic groups of O. viverrini s.l. and specific wetland systems, and raise important questions regarding the epidemiological significance of these genetic differences.
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Affiliation(s)
- Opal Pitaksakulrat
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Liver Fluke and Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Faculty of Veterinary Science, Prince of Songkla University, Songkhla 90110, Thailand
| | - Bonnie L Webster
- Department of Life Sciences, Parasites and Vectors Division, Natural History Museum, London SW7 5BD, UK; The London Centre for Neglected Tropical Disease Research (LCNTDR), Faculty of Medicine (St Mary's Campus), Imperial College, Norfolk Place, London W2 1PG, UK
| | - Joanne P Webster
- The London Centre for Neglected Tropical Disease Research (LCNTDR), Faculty of Medicine (St Mary's Campus), Imperial College, Norfolk Place, London W2 1PG, UK; Department of Infectious Disease Epidemiology, Faculty of Medicine (St Mary's Campus), Imperial College, Norfolk Place, London W2 1PG, UK; Centre for Emerging, Endemic and Exotic Diseases (CEEED), Department of Pathobiology and Popluation Sciences, Royal Veterinary College, University of London, Hawkshead Campus, Herts, AL9 7TA, UK
| | - Thewarach Laha
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Weerachai Saijuntha
- Walai Rukhavej Botanical Research Institute, Mahasarakham University, Mahasarakham 44150, Thailand
| | - Poppy H L Lamberton
- Wellcome Centre for Molecular Parasitology, Institute of Biodiversity, Animal Health and Comparative Medicine, Graham Kerr Building, The University of Glasgow, Glasgow G12 8QQ, UK
| | - Nadda Kiatsopit
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Liver Fluke and Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cholangiocarcinoma Screening and Care Program (CASCAP), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Ross H Andrews
- Liver Fluke and Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Department of Infectious Disease Epidemiology, Faculty of Medicine (St Mary's Campus), Imperial College, Norfolk Place, London W2 1PG, UK; Cholangiocarcinoma Screening and Care Program (CASCAP), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Trevor N Petney
- Cholangiocarcinoma Screening and Care Program (CASCAP), Khon Kaen University, Khon Kaen 40002, Thailand; Institute of Zoology 1: Ecology and Parasitology, Karlsruhe Institute of Technology, Kornblumen Strasse 13, Karlsruhe, Germany
| | - Paiboon Sithithaworn
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Liver Fluke and Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cholangiocarcinoma Screening and Care Program (CASCAP), Khon Kaen University, Khon Kaen 40002, Thailand.
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45
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Research progress of cholangiocarcinoma induced by liver fluke infection. INFECTION INTERNATIONAL 2018. [DOI: 10.2478/ii-2018-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractA liver fluke is a digenetic trematode parasitizing in the hepatic ducts of human beings or animals. Patients with liver fluke infection suffer from a series of hepatobiliary diseases. The prevalence of cholangiocarcinoma is significantly high in areas with a high incidence of clonorchiasis. A liver fluke is an important biocarcinogenic factor in the occurrence of cholangiocarcinoma. The secretory products of the body of this parasite and long-term mechanical stimulation induce continuous inflammation of the bile duct. Gene expression of the bile duct cells is imbalanced, leading to carcinogenesis of the bile duct. This article provides a summary of recent studies on the epidemiology, clinicopathology, and molecular biology of cholangiocarcinoma induced by liver fluke infection.
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Bürli C, Harbrecht H, Odermatt P, Sayasone S, Chitnis N. Mathematical analysis of the transmission dynamics of the liver fluke, Opisthorchis viverrini. J Theor Biol 2018; 439:181-194. [DOI: 10.1016/j.jtbi.2017.11.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 11/10/2017] [Accepted: 11/28/2017] [Indexed: 12/31/2022]
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Clonorchis sinensis and Clonorchiasis: The Relevance of Exploring Genetic Variation. ADVANCES IN PARASITOLOGY 2018; 100:155-208. [PMID: 29753338 DOI: 10.1016/bs.apar.2018.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Parasitic trematodes (flukes) cause substantial mortality and morbidity in humans. The Chinese liver fluke, Clonorchis sinensis, is one of the most destructive parasitic worms in humans in China, Vietnam, Korea and the Russian Far East. Although C. sinensis infection can be controlled relatively well using anthelmintics, the worm is carcinogenic, inducing cholangiocarcinoma and causing major suffering in ~15 million people in Asia. This chapter provides an account of C. sinensis and clonorchiasis research-covering aspects of biology, epidemiology, pathogenesis and immunity, diagnosis, treatment and control, genetics and genomics. It also describes progress in the area of molecular biology (genetics, genomics, transcriptomics and proteomics) and highlights challenges associated with comparative genomics and population genetics. It then reviews recent advances in the sequencing and characterisation of the mitochondrial and nuclear genomes for a Korean isolate of C. sinensis and summarises salient comparative genomic work and the implications thereof. The chapter concludes by considering how advances in genomic and informatics will enable research on the genetics of C. sinensis and related parasites, as well as the discovery of new fluke-specific intervention targets.
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48
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Petney TN, Andrews RH, Saijuntha W, Tesana S, Prasopdee S, Kiatsopit N, Sithithaworn P. Taxonomy, Ecology and Population Genetics of Opisthorchis viverrini and Its Intermediate Hosts. ADVANCES IN PARASITOLOGY 2018; 101:1-39. [PMID: 29907251 DOI: 10.1016/bs.apar.2018.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
There have been considerable advances in our understanding of the systematics and ecology of Opisthorchis viverrini; however, this new knowledge has not only clarified but also complicated the situation. We now know that what was once considered to be a single species is, in fact, a species complex, with the individual species being confined to specific wetland areas. There is also a strong genetic association between the members of the O. viverrini species complex and their Bithynia snail intermediate hosts. Although this does not negate data collected before the recognition of this situation, it does lead to the caveat that regional and temporal variations in data collected may be related to the species examined. The advances in ecology have generally been spatially limited and have led, in part, to contradictory results that may well be related to nonrecognition of the species studied. It may also be related to natural temporal and spatial variation related, for example, to habitat characteristics. To understand the variation present, it will be necessary to conduct long-term (several years at least) sampling projects after defining the genetic characteristics of O. viverrini sensu lato and its Bithynia snail intermediate hosts.
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Affiliation(s)
- Trevor N Petney
- Cholangiocarcinoma Screening and Care Program (CASCAP), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand; Institute of Zoology 1: Ecology and Parasitology, Karlsruhe Institute of Technology, Karlsruhe, Germany; State Museum of Natural History Karlsruhe, Karlsruhe, Germany
| | - Ross H Andrews
- Cholangiocarcinoma Screening and Care Program (CASCAP), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand; Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Weerachai Saijuntha
- Walai Rukhavej Botanical Research Institute, Mahasarakham University, Maha Sarakham, Thailand
| | - Smarn Tesana
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Sattrachai Prasopdee
- Chulabhorn International College of Medicine, Thammasat University, Bangkok, Thailand
| | - Nadda Kiatsopit
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Paiboon Sithithaworn
- Cholangiocarcinoma Screening and Care Program (CASCAP), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand; Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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Huang Y, Huang D, Geng Y, Fang S, Yang F, Wu C, Zhang H, Wang M, Zhang R, Wang X, Wu S, Cao J, Zhang R. An Integrated Control Strategy Takes Clonorchis sinensis Under Control in an Endemic Area in South China. Vector Borne Zoonotic Dis 2017; 17:791-798. [PMID: 29040056 DOI: 10.1089/vbz.2017.2133] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Clonorchis sinensis is an important foodborne zoonosis worldwide and prevalent in China for more than 2000 years. According to the experience of controlling Schistosoma japonica, China started to establish the integrated control strategy for C. sinensis in endemic areas. Lou village, the largest village in Shenzhen city in South China was taken as a pilot site. This longitudinal study assessed the infection status of C. sinensis among people and intermediate hosts from 2006 to 2014 in Lou village. After a continuous intervention with the integrated control strategy, the prevalence of C. sinensis decreased significantly to 2.01% in 2014. The infection intensity also reduced significantly with eggs per gram varying from 45.6 ± 3.4 in 2010 to 21.7 ± 1.6 in 2012. There is also a statistically significant decrease of the prevalence of C. sinensis metacercariae in fish hosts from 16.51% in 2008 before the intervention to 5.33% in 2014. All the old-styled toilets were replaced by sanitary ones with a harmless processing design in 2014. No viable parasite eggs were detected in stool samples from the reconstructed toilets. Health education played an important role in changing the eating habits among the local residents, with a significant decrease in the prevalence of eating raw fish from 91.99% in 2008 to 59.87% in 2014. The evaluation suggested that the integrated strategy we have performed in Lou village is effective in controlling the C. sinensis infection and maintaining the infection rate at a lower level, which can be promoted in other endemic areas.
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Affiliation(s)
- Yalan Huang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Dana Huang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Yijie Geng
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Shisong Fang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Fan Yang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Chunli Wu
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Hailong Zhang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Miao Wang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Ran Zhang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Xin Wang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Shuang Wu
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
| | - Jianping Cao
- 2 National Institute of Parasitic Diseases , Chinese Center for Disease Control and Prevention, Shanghai, P.R. China
| | - Renli Zhang
- 1 Shenzhen Center for Disease Control and Prevention , Shenzhen, P.R. China
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Vonghachack Y, Odermatt P, Taisayyavong K, Phounsavath S, Akkhavong K, Sayasone S. Transmission of Opisthorchis viverrini, Schistosoma mekongi and soil-transmitted helminthes on the Mekong Islands, Southern Lao PDR. Infect Dis Poverty 2017; 6:131. [PMID: 28866984 PMCID: PMC5582398 DOI: 10.1186/s40249-017-0343-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 08/02/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Prevalence of Opisthorchis viverrini, Schistosoma mekongi and soil-transmitted helminths (STH) remains high in Lao People's Democratic Republic (Lao PDR), despite control efforts including mass-drug administration, education and communication campaigns. New approaches are required to advance helminth control. METHODS An ecohealth study was conducted on two Mekong islands in Southern Laos. Demographic and behavioural data were collected by questionnaire. Human and animal reservoir stools were examined. Bithynia spp. and Neotricula aperta snails were examined using shedding. Fresh water fish were examined using digestion technique. Multivariate random-effects analysis was used to find risk factors associated with helminth infections. RESULTS Human infection rates with O. viverrini, hookworm, S. mekongi, Trichuris trichiura, Ascaris lumbricoides and Taenia spp. were 60.7%, 44.1%, 22.2%, 4.1%, 0.6% and 0.1%, respectively. Heavy intensity infections were 4.2%, 3.6% and 1.8% for O. viverrini, S. mekongi and hookworm, respectively. O. viverrini and S. mekongi infection rates among dogs and cats were 25.0% and 14.7%, respectively. Of the cats tested, 53.1% were infected with O. viverrini. Prevalence of O. viverrini and S. mekongi in snails was 0.3% and 0.01%, respectively. Overall prevalence of O. viverrini infection in fresh water fish was 26.9%, with the highest infection rates occurring in Hampala dispa (87.1%), Cyclocheilichthys apogon (85.7%) and Puntius brevis (40.0%). Illiteracy and lower socioeconomic status increased the risk of O. viverrini infection, while those aged 10-16 years and possessing latrines at home were less likely to be infected. Household dogs and cats that consumed raw fish were significantly and positively associated with O. viverrini infection of the household members. For S. mekongi, children under 9 years old were exposed significantly to this infection, compared to older age groups. CONCLUSIONS There is a pressing need to design and implement an integrated helminth control intervention on the Mekong Islands in southern Lao PDR. Given the highly dynamic transmission of O. viverrini, S. mekongi, STH and extended multiparasitism, annual mass-drug administration is warranted along with environmental modifications, health education and improved access to clean water and adequate sanitation to consolidate morbidity control and move towards elimination. TRAIL REGISTRATION NUMBER Our findings presented here are from a cross-sectional study, therefore, it has not been registered.
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Affiliation(s)
- Youthanavanh Vonghachack
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland.,Faculty of Basic Sciences, University of Health Sciences, Vientiane Capital, Lao PDR
| | - Peter Odermatt
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - Keoka Taisayyavong
- Malariology, Parasitology and Entomology Station, Champasack province, Lao PDR
| | | | - Kongsap Akkhavong
- National Institute of Public Health, Ministry of Health, Vientiane Capital, Lao PDR
| | - Somphou Sayasone
- National Institute of Public Health, Ministry of Health, Vientiane Capital, Lao PDR.
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