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https://www.readbyqxmd.com/read/28216369/role-of-socio-cultural-and-economic-factors-in-cyprinid-fish-distribution-networks-and-consumption-in-lawa-lake-region-northeast-thailand-novel-perspectives-on-opisthorchis-viverrini-transmission-dynamics
#1
Christina Sunyoung Kim, John F Smith, Apiporn Suwannatrai, Pierre Echaubard, Bruce Wilcox, Sasithorn Kaewkes, Paiboon Sithithaworn, Banchob Sripa
Opisthorchis viverrini (Ov) is a fish-borne parasite endemic in parts of Lao PDR, Cambodia, southern Vietnam and Northeast Thailand (Isaan) where an estimated 10 million people are infected. Human Ov infection, associated with hepatobiliary complications, including cholangiocarcinoma (CCA), occurs when infected fish are consumed raw or undercooked, a longstanding cultural tradition in the region. This mixed- methods descriptive study was carried out in Isaan villages around Lawa Lake, Khon Kaen Province, known for their Ov endemicity...
February 16, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28198451/elevated-prevalence-of-helicobacter-species-and-virulence-factors-in-opisthorchiasis-and-associated-hepatobiliary-disease
#2
Raksawan Deenonpoe, Eimorn Mairiang, Pisaln Mairiang, Chawalit Pairojkul, Yaovalux Chamgramol, Gabriel Rinaldi, Alex Loukas, Paul J Brindley, Banchob Sripa
Recent reports suggest that Opisthorchis viverrini serves as a reservoir of Helicobacter and implicate Helicobacter in pathogenesis of opisthorchiasis-associated cholangiocarcinoma (CCA). Here, 553 age-sex matched cases and controls, 293 and 260 positive and negative for liver fluke O. viverrini eggs, of residents in Northeastern Thailand were investigated for associations among infection with liver fluke, Helicobacter and hepatobiliary fibrosis. The prevalence of H. pylori infection was higher in O. viverrini-infected than uninfected participants...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28188767/social-network-analysis-of-food-sharing-among-households-in-opisthorchiasis-endemic-villages-of-lawa-lake-thailand
#3
Waraphon Phimpraphai, Sirikachorn Tangkawattana, Piya Sereerak, Suwicha Kasemsuwan, Banchob Sripa
Consumption of raw fish is a well-documented risk factor for Opisthorchis viverrini infection. Sharing of food, especially raw fish recipes may influence the spread of disease through a community. Using social network analysis of an ego network, we investigated food sharing among households in an Opisthorchis-endemic area. Network centrality properties were used to explain the differences in O. viverrini transmission and control between villages with a low and high prevalence of infection. Information on demography and O...
February 8, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28174906/efficacy-and-safety-of-praziquantel-against-light-infections-of-opisthorchis-viverrini-a-randomized-parallel-single-blind-dose-ranging-trial
#4
Somphou Sayasone, Isabel Meister, Jason R Andrews, Peter Odermatt, Youthanavanh Vonghachack, Syda Xayavong, Kanpaseuth Senggnam, Khampheng Phongluxa, Jan Hattendorf, Isaac I Bogoch, Jennifer Keiser
No abstract text is available yet for this article.
February 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28163802/nitrative-and-oxidative-dna-damage-in-infection-related-carcinogenesis-in-relation-to-cancer-stem-cells
#5
REVIEW
Shosuke Kawanishi, Shiho Ohnishi, Ning Ma, Yusuke Hiraku, Shinji Oikawa, Mariko Murata
Infection and chronic inflammation have been recognized as important factors for carcinogenesis. Under inflammatory conditions, reactive oxygen species (ROS) and reactive nitrogen species (RNS) are generated from inflammatory and epithelial cells, and result in the formation of oxidative and nitrative DNA lesions, such as 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) and 8-nitroguanine. The DNA damage can cause mutations and has been implicated in inflammation-mediated carcinogenesis. It has been estimated that various infectious agents are carcinogenic to humans (IARC group 1), including bacterium Helicobacter pylori (H...
2017: Genes and Environment: the Official Journal of the Japanese Environmental Mutagen Society
https://www.readbyqxmd.com/read/28138021/co-infection-of-helicobacter-pylori-and-opisthorchis-viverrini-enhances-the-severity-of-hepatobiliary-abnormalities-in-hamsters
#6
Rungtiwa Dangtakot, Somchai Pinlaor, Upsornsawan Itthitaetrakool, Apisit Chaidee, Chariya Chomvarin, Arunnee Sangka, Chotechana Wilailuckana, Porntip Pinlaor
Persistent infection with Opisthorchis viverrini causes hepatobiliary abnormalities, predisposing infected individuals to cholangiocarcinoma (CCA). In addition, Helicobacter pylori is highly prevalent in most countries and is a possible risk factor for CCA; however, its role in enhancing hepatobiliary abnormality is unclear. Here, we investigated the effects of co-infection of H. pylori and O. viverrini on hepatobiliary abnormality. Hamsters were divided into four groups: (1) normal, (2) H. pylori-infected (HP), (3) O...
January 30, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28131825/targeting-hexokinase-ii-as-a-possible-therapy-for-cholangiocarcinoma
#7
Ubonrat Thamrongwaranggoon, Wunchana Seubwai, Chatchai Phoomak, Sakkarn Sangkhamanon, Ubon Cha'on, Thidarat Boonmars, Sopit Wongkham
Overexpression of hexokinase 2 (HKII) has been demonstrated in various cancers. A number of in vitro and in vivo studies in several cancers show the significance of HKII in many cellular processes including proliferation, metastasis and apoptosis. However, the role of HKII in Opisthorchis viverrini (Ov) associated cholangiocarcinoma (CCA) is still unknown. In the present study, the expression and roles of HKII were determined in Ov associated CCA. The expression of HKII was investigated in 82 patients with histologically proven CCAs by immunohistochemistry...
January 25, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28108370/application-of-environmental-dna-analysis-for-the-detection-of-opisthorchis-viverrini-dna-in-water-samples
#8
Hiroki Hashizume, Megumi Sato, Marcello Otake Sato, Sumire Ikeda, Tippayarat Yoonuan, Surapol Sanguankiat, Tiengkham Pongvongsa, Kazuhiko Moji, Toshifumi Minamoto
Opisthorchiasis, which can lead to cholangiocarcinoma in cases of chronic infection, is a major public health problem in Southeast Asian countries. The trematode, Opisthorchis viverrini, is the causative agent of the disease. Accurate and rapid monitoring of O. viverrini is crucial for disease prevention and containment. Therefore, in this study we sought to develop a novel species-specific real-time PCR assay for detecting O. viverrini using environmental DNA (eDNA). The diagnostic sensitivity of the newly developed real-time PCR assay was similar to that of the traditional PCR assay for 50 fecal samples collected in Lao PDR (21 and 19 samples were positive by real-time PCR and traditional PCR, respectively)...
January 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28105582/-control-of-opisthorchis-viverrini-infection-for-cholangiocarcinoma-prevention
#9
Y Buisson
The International Agency for Research on Cancer (IARC) has classified two liver flukes as carcinogenic to humans (Group 1): Opisthorchis viverrini in 1994 and Clonorchis sinensis in 2009. This review is focused on O. viverrini, the most studied of these two trematodes, which infects nearly 10 million people in Southeast Asia. The life cycle involves two intermediate hosts living in fresh water: a snail of the genus Bithynia and a ciprinid fish. The definitive hosts (human, cat, dog) become infected by ingesting raw fish containing metacercariae, the infective stage of the parasite...
January 19, 2017: Bulletin de la Société de Pathologie Exotique
https://www.readbyqxmd.com/read/28043382/protozoan-and-helminth-parasite-fauna-of-free-living-croatian-wild-wolves-canis-lupus-analyzed-by-scat-collection
#10
Carlos Hermosilla, Sonja Kleinertz, Liliana M R Silva, Jörg Hirzmann, Djuro Huber, Josip Kusak, Anja Taubert
The European wolf (Canis lupus) is a large carnivore species present in limited areas of Europe with several small populations still being considered as endangered. Wolves can be infected by a wide range of protozoan and metazoan parasites with some of them affecting free-living wolf health condition. On this account, an epidemiological survey was conducted to analyze the actual parasite fauna in Croatian wild wolves. In total, 400 individual faecal samples were collected during field studies on wolf ecology in the years 2002-2011...
January 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28032359/opisthorchis-felineus-negatively-associates-with-skin-test-reactivity-in-russia-europrevall-inco-study
#11
Olga S Fedorova, Jacqueline J Janse, Ludmila M Ogorodova, Marina M Fedotova, Rogier A Achterberg, Jaco J Verweij, Montserrat Fernández-Rivas, Serge A Versteeg, James Potts, Cosetta Minelli, Ronald van Ree, Peter Burney, Maria Yazdanbakhsh
BACKGROUND: Most studies on the relationship between helminth infections and atopic disorders have been conducted in (sub)tropical developing countries where exposure to multiple parasites and lifestyle can confound the relationship. We aimed to study the relationship between infection with the fish-borne helminth Opishorchis felineus and specific IgE, skin prick testing and atopic symptoms in Western-Siberia, with lifestyle and hygiene standards of a developed country. METHODS: Schoolchildren aged 7 to 11 years were sampled from one urban and two rural regions...
December 29, 2016: Allergy
https://www.readbyqxmd.com/read/28030606/body-condition-peaks-at-intermediate-parasite-loads-in-the-common-bully-gobiomorphus-cotidianus
#12
Alberto Maceda-Veiga, Andy J Green, Robert Poulin, Clément Lagrue
Most ecologists and conservationists perceive parasitic infections as deleterious for the hosts. Their effects, however, depend on many factors including host body condition, parasite load and the life cycle of the parasite. More research into how multiple parasite taxa affect host body condition is required and will help us to better understand host-parasite coevolution. We used body condition indices, based on mass-length relationships, to test the effects that abundances and biomasses of six parasite taxa (five trematodes, Apatemon sp...
2016: PloS One
https://www.readbyqxmd.com/read/27989833/identification-and-characterization-of-protein-14-3-3-in-carcinogenic-liver-fluke-opisthorchis-viverrini
#13
Alok Kafle, Pranom Puchadapirom, Sirikanya Plumworasawat, Rieofarng Dontumprai, Waraporn Chan-On, Sureemas Buates, Thewarach Laha, Banchob Sripa, Sutas Suttiprapa
Protein 14-3-3s are abundant phospho-serine/threonine binding proteins, which are highly conserved among eukaryotes. Members of this protein family mediate metabolism and signal transduction networks through binding to hundreds of other protein partners. Protein 14-3-3s have been studied in other species of parasitic helminthes, but little is known about this protein in the carcinogenic liver fluke Opisthorchis viverrini. In this study, we identified and characterized protein 14-3-3s of O. viverrini. Seven protein 14-3-3 encoded sequences were retrieved from the O...
October 27, 2016: Parasitology International
https://www.readbyqxmd.com/read/27965165/suspected-cases-of-cholangiocarcinoma-seen-in-reference-hospitals-in-lao-people-s-democratic-republic
#14
Phonepasong Ayé Soukhathammavong, Youthanavanh Vonghachack, Christoph Hatz, Kongsap Akkhavong, Peter Odermatt
Cholangiocarcinoma (CCA) poses a significant public health problem in Southeast Asia, with chronic Opisthorchis viverrini infection being the main risk factor. Epidemiological data on CCA is not available for Lao People Democratic Republic (Lao PDR), though there is a high prevalence of O. viverrini infection in the country. A hospital record-based retrospective study was carried out in six referral hospitals (four in the capital city, one in Savannakhet, one in Pakse) to assess the number of suspected CCA cases admitted between January 2006 and December 2010...
December 11, 2016: Parasitology International
https://www.readbyqxmd.com/read/27956092/ultrasonographic-features-of-hepatobiliary-in-opisthorchiasis
#15
Eimorn Mairiang
Infection with the liver fluke, Opisthorchis viverrini (OV), is an important public health problem in northeast Thailand where people have a habit of eating raw or inadequately cooked fish. Opisthorchiasis Is associated with a number of asymptomatic hepatobiliary abnormalities and cholangiocarcinoma (CCA) that can be observed conveniently by ultrasonography. The ultrasonographicclassification of hepatobiliary pathology opisthorchiasis will be presented.
December 10, 2016: Parasitology International
https://www.readbyqxmd.com/read/27955744/glycoproteomics-analysis-of-plasma-proteins-associated-with-opisthorchis-viverrini-infection-induced-cholangiocarcinoma-in-hamster-model
#16
Pramote Sriwanitchrak, Atchara Paemanee, Sittiruk Roytrakul, Vithoon Viyanant, Kesara Na-Bangchang
OBJECTIVE: To apply lectin affinity chromatography and glycoproteomics-based LC-MS/MS to preliminarily investigate the possible potential plasma biomarkers of Opisthorchis viverrini (OV)-associated CCA in OV/dimethylnitrosamine (DMN)-induced CCA hamster model. METHODS: Nine Syrian hamsters were divided into 3 groups as follows (n = 3 each): normal (healthy control group); OV group; and OV/DMN group (CCA group). Pooled plasma samples collected from animals in each group at the 6th month post-infection with OV metacercarae were subjected to glycoproteomics analysis...
December 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27939972/opisthorchiasis-in-western-siberia-epidemiology-and-distribution-in-human-fish-snail-and-animal-populations
#17
Natalia I Yurlova, Elena N Yadrenkina, Natalia M Rastyazhenko, Elena А Serbina, Viktor V Glupov
Opisthorchiasis is a widespread helminth infection in Russia. The largest opisthorchiasis endemic focus in the world is the Ob river watershed in Western Siberia. The main causative agent of this condition is the liver fluke, Opisthorchis felineus. In addition, another liver fluke species in the Opisthorchiidae family, Metorchis bilis, causes a symptomatically similar disease, metorchiasis. Despite a long research history going back to 1927, opisthorchiasis remains a serious problem in Russia, and numerous questions related to the epidemiology of these liver fluke infections and their patterns of distribution in Western Siberia, the causes of high prevalence in different populations, and the prognosis of the epidemiological situation remain to be answered...
December 8, 2016: Parasitology International
https://www.readbyqxmd.com/read/27927864/efficacy-and-safety-of-praziquantel-against-light-infections-of-opisthorchis-viverrini-a-randomised-parallel-single-blind-dose-ranging-trial
#18
Somphou Sayasone, Isabel Meister, Jason R Andrews, Peter Odermatt, Youthanavanh Vonghachack, Syda Xayavong, Kanpaseuth Senggnam, Khampheng Phongluxa, Jan Hattendorf, Isaac I Bogoch, Jennifer Keiser
BACKGROUND: The liver fluke Opisthorchis viverrini, highly prevalent in Southeast Asia, is an important public health burden, including a risk factor for developing an aggressive bile duct cancer, cholangiocarcinoma, in chronically infected patients. Praziquantel, administered at single 40 mg/kg in preventive chemotherapy programs and 3 x 25 mg/kg for individual treatment is the drug of choice, yet information on the nature of the dose-response relationship is lacking. METHODS: We performed a randomized, parallel, single blind dose-ranging Phase 2 trial in Lao PDR in O...
December 7, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27926938/uncovering-the-pathogenic-landscape-of-helminth-opisthorchis-viverrini-infections-a-cross-sectional-study-on-contributions-of-physical-and-social-environment-and-healthcare-interventions
#19
Xueyuan Ong, Yi-Chen Wang, Paiboon Sithithaworn, Jutamas Namsanor, David Taylor, Luxana Laithavewat
BACKGROUND: Helminth infections have proven recalcitrant to control by chemotherapy in many parts of Southeast Asia and indeed farther afield. This study isolates and examines the influence of different aspects of the physical and social environment, and uneven intervention effort contributing to the pathogenic landscape of human Opisthorchis viverrini infections. METHODOLOGY: A cross-sectional survey, involving 632 participants, was conducted in four villages in northeast Thailand to examine the impact on prevalence and parasite burden of the reservoir dam environment, socio-economic, demographic, and behavioral factors, and health center intervention efforts...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27919744/co-infections-with-liver-fluke-and-helicobacter-species-a-paradigm-change-in-pathogenesis-of-opisthorchiasis-and-cholangiocarcinoma
#20
REVIEW
Banchob Sripa, Raksawan Deenonpoe, Paul J Brindley
Infection with the fish-borne liver fluke Opisthorchis viverrini is classified by the International Agency for Research on Cancer as a Group 1 carcinogen: definitely carcinogenic in humans. Cofactors likely contribute to bile duct cancer (cholangiocarcinoma) caused by this infection. Here we review recent findings that address the role of liver fluke associated H. pylori in hepatobiliary disease and malignancy. We hypothesize that co-infection by O. viverrini and the bacillus Helicobacter pylori is central of liver fluke infection associated cholangiocarcinoma...
December 3, 2016: Parasitology International
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