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https://www.readbyqxmd.com/read/27914324/development-and-validation-of-species-specific-molecular-diagnostic-tool-for-opisthorchis-felineus-digenea-opisthorchiidae-metacercariae
#1
Monica Caffara, Laura Serracca, Andrea Gustinelli, Walter Vencia, Irene Rossini, Marino Prearo, Maria L Fioravanti
Opisthorchis felineus (family Opisthorchiidae) is a parasitic flatworm representing a serious threat to humans in some countries. Opisthorchiasis occurs after consumption of raw or undercooked cyprinid fish infected by the metacercarial stage of the parasite. Due to its small size, detection of the parasite in fish fillet is time-consuming and difficult. Furthermore, isolated metacercariae can be identified to genus but not to species level using morphological features and molecular techniques are necessary...
November 28, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27893749/differential-protein-expression-in-the-hemolymph-of-bithynia-siamensis-goniomphalos-infected-with-opisthorchis-viverrini
#2
Kulwadee Suwannatrai, Apiporn Suwannatrai, Pairat Tabsripair, Jariya Umka Welbat, Sirikachorn Tangkawattana, Cinzia Cantacessi, Jason Mulvenna, Smarn Tesana, Alex Loukas, Javier Sotillo
Bithynia siamensis goniomphalos is a freshwater snail that serves as the first intermediate host of the human liver fluke Opisthorchis viverrini. This parasite is a major public health problem in different countries throughout the Greater Mekong sub-region (Thailand, southern Vietnam, Lao PDR and Cambodia). Chronic O. viverrini infection also results in a gradual increase of fibrotic tissues in the biliary tract that are associated with hepatobiliary diseases and contribute to cholangiocarcinoma (a fatal type of bile duct cancer)...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27890720/the-lawa-model-a-sustainable-integrated-opisthorchiasis-control-program-using-the-ecohealth-approach-in-the-lawa-lake-region-of-thailand
#3
Banchob Sripa, Sirikachorn Tangkawattana, Thinnakorn Sangnikul
Opisthorchiasis caused by the carcinogenic liver fluke Opisthorchis viverrini is a major foodborne parasitic zoonotic disease in Thailand and neighboring Mekong countries. The infection is associated with several hepatobiliary diseases including cholangiocarcinoma (CCA). The rates of CCA in regions where the parasite is endemic are unprecedented. Extensive research on various aspects of opisthorchiasis has been conducted in recent decades. However, the current status of O. viverrini infection in the country is approaching 85% prevalence in certain endemic areas even after more than 30years of control programs in Thailand...
November 24, 2016: Parasitology International
https://www.readbyqxmd.com/read/27882434/new-locality-record-for-haplorchoides-mehrai-and-possible-interactions-with-opisthorchis-viverrini-metacercariae-in-cyprinid-fishes-in-northeast-thailand
#4
Yupin Manpratum, Wanlop Kaewkes, Pierre Echaubard, Banchob Sripa, Sasithorn Kaewkes
Metacercariae of Opisthorchis viverrini, a carcinogenic liver fluke, and Haplorchoides sp., a trematode maturing in catfish, are commonly found in cyprinid fish, the second intermediate hosts of both flukes. However, the specific identity of Haplorchoides sp. in Thailand and a precise assessment of the effects of co-infections with O. viverrini have never been clarified. Therefore, we aimed to identify the species of Haplorchoides and to investigate possible interactions of the two trematode species in cyprinid fishes...
November 23, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27880787/seasonal-and-spatial-environmental-influence-on-opisthorchis-viverrini-intermediate-hosts-abundance-and-distribution-insights-on-transmission-dynamics-and-sustainable-control
#5
Christina Sunyoung Kim, Pierre Echaubard, Apiporn Suwannatrai, Sasithorn Kaewkes, Bruce A Wilcox, Banchob Sripa
BACKGROUND: Opisthorchis viverrini (Ov) is a complex-life-cycle trematode affecting 10 million people in SEA (Southeast Asia). Human infection occurs when infected cyprinid fish are consumed raw or undercooked. Ov requires three hosts and presents two free-living parasitic stages. As a consequence Ov transmission and infection in intermediate and human hosts are strongly mediated by environmental factors and understanding how environmental variability influences intermediate host abundance is critical...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27835838/developmental-stages-of-fish-blood-flukes-cardicola-forsteri-and-cardicola-opisthorchis-trematoda-aporocotylidae-in-their-polychaete-intermediate-hosts-collected-at-pacific-bluefin-tuna-culture-sites-in-japan
#6
Kazuo Ogawa, Sho Shirakashi, Kazuki Tani, Sang Phil Shin, Katsuya Ishimaru, Tomoki Honryo, Yukitaka Sugihara, Hiro'omi Uchida
Farming of Pacific bluefin tuna (PBT), Thunnus orientalis, is a rapidly growing industry in Japan. Aporocotylid blood flukes of the genus Cardicola comprising C. orientalis, C. opisthorchis and C. forsteri are parasites of economic importance for PBT farming. Recently, terebellid polychaetes have been identified as the intermediate hosts for all these parasites. We collected infected polychaetes, Terebella sp., the intermediate host of C. opisthorchis, from ropes and floats attached to tuna cages in Tsushima, Nagasaki Prefecture, Japan...
November 8, 2016: Parasitology International
https://www.readbyqxmd.com/read/27821695/development-of-a-pcr-assay-for-diagnosing-trematode-opisthorchis-and-haplorchis-infections-in-human-stools
#7
Pheophet Lamaningao, Seiji Kanda, Sakhone Laimanivong, Takaki Shimono, Andrew Waleluma Darcy, Amphay Phyaluanglath, Nobuyuki Mishima, Toshimasa Nishiyama
We developed a combined conventional polymerase chain reaction (PCR) and real-time PCR (qPCR)-based assay for detecting and discriminating between Opisthorchis viverrini and Haplorchis taichui parasite infections. The first PCR amplifies the mitochondrial cytochrome c oxidase subunit I (COI) genes of parasites, and differential diagnosis is achieved by performing qPCR with specific primers and SYBR Green I. The detection limit of the assay was found to be 2.0 × 10(2) plasmid copies in a test in which a stool sample was spiked with a single egg, which is equivalent to 5 eggs per gram (EPG)...
November 7, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27806126/chronic-opisthorchis-viverrini-infection-changes-the-liver-microbiome-and-promotes-helicobacter-growth
#8
Upsornsawan Itthitaetrakool, Porntip Pinlaor, Somchai Pinlaor, Chariya Chomvarin, Rungtiwa Dangtakot, Apisit Chaidee, Chotechana Wilailuckana, Arunnee Sangka, Aroonlug Lulitanond, Puangrat Yongvanit
Adults of Opisthorchis viverrini reside in the biliary system, inducing inflammation of bile ducts and cholangitis, leading to hepatobiliary disease (HBD) including cholangiocarcinoma. O. viverrini infection also has major implications for the bacterial community in bile ducts and liver. To investigate this in chronic O. viverrini infection (≥ 8 months p.i.), bacterial genomic DNA from livers of hamsters and from worms was investigated using culture techniques, PCR for Helicobacter spp. and high-throughput next-generation sequencing targeting the V3-V4 hypervariable regions of prokaryotic 16S rRNA gene...
2016: PloS One
https://www.readbyqxmd.com/read/27794488/changing-patterns-of-prevalence-in-opisthorchis-viverrini-sensu-lato-infection-in-children-and-adolescents-in-northeast-thailand
#9
Narong Khuntikeo, Paiboon Sithithaworn, Watcharin Loilom, Nisana Namwat, Puangrat Yongvanit, Bandit Thinkhamrop, Nadda Kiatsopit, Ross H Andrews, Trevor N Petney
Infection with the liver fluke Opisthorchis viverrini sensu lato (s.l.), a group 1 carcinogen, is the most important risk factor for developing cholangiocarcinoma (CCA) in Southeast Asia. Cholangiocarcinoma is a fatal disease with the world's highest incidence being found in northeast Thailand. Liver fluke infection occurs through eating raw or partially cooked cyprinid fish containing metacercariae and, therefore, the control of O. viverrini s.l. infection should lead to a reduction in CCA incidence. In this report, we review and analyze the age-prevalence profile data of O...
October 26, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27774575/modeling-impacts-of-climate-change-on-the-potential-distribution-of-the-carcinogenic-liver-fluke-opisthorchis-viverrini-in-thailand
#10
A Suwannatrai, K Pratumchart, K Suwannatrai, K Thinkhamrop, J Chaiyos, C S Kim, R Suwanweerakamtorn, T Boonmars, T Wongsaroj, B Sripa
Global climate change is now regarded as imposing a significant threat of enhancing transmission of parasitic diseases. Maximum entropy species distribution modeling (MaxEnt) was used to explore how projected climate change could affect the potential distribution of the carcinogenic liver fluke, Opisthorchis viverrini, in Thailand. A range of climate variables was used: the Hadley Global Environment Model 2-Earth System (HadGEM2-ES) climate change model and also the IPCC scenarios A2a for 2050 and 2070. Occurrence data from surveys conducted in 2009 and 2014 were obtained from the Department of Disease Control, Ministry of Public Health, Thailand...
October 24, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27769807/cytokine-profiles-in-opisthorchis-viverrini-stimulated-peripheral-blood-mononuclear-cells-from-cholangiocarcinoma-patients
#11
Arpa Surapaitoon, Sutas Suttiprapa, Narong Khuntikeo, Chawalit Pairojkul, Banchob Sripa
The carcinogenic liver fluke Opisthorchis viverrini causes chronic inflammation in the bile duct and resulting in unremitting tissue damage that lead to hepatobiliary diseases, including cholangiocarcinoma (CCA). Despite inflammatory cytokine expression having been studied in the animal model, so far no studies have been carried out on cytokines in human CCA cases. Here we report the profile of cytokine production in peripheral blood mononuclear cells (PBMCs) collected from O. viverrini-associated human CCA and uninfected normal controls after stimulation with O...
February 2017: Parasitology International
https://www.readbyqxmd.com/read/27746382/association-between-opisthorchis-viverrini-and-leptospira-spp-infection-in-endemic-northeast-thailand
#12
Chinh Dang Van, Galayanee Doungchawee, Sutas Suttiprapa, Yuji Arimatsu, Sasithorn Kaewkes, Banchob Sripa
Opisthorchiasis caused by Opisthorchis viverrini is an important foodborne trematodiasis in Thailand, Laos and Cambodia. Interestingly, the opisthorchiasis endemic region overlaps with an area of leptospirosis emergence. Here we report an association between opisthorchiasis and leptospirosis in Thailand. Of 280 sera collected from villagers living around the Lawa wetland complex in Khon Kaen province, 199 (71%) were seropositive for leptospirosis by immunochromatography. Individuals with O. viverrini infection had a significantly higher rate of leptospirosis than those without (P=0...
October 13, 2016: Parasitology International
https://www.readbyqxmd.com/read/27737764/cpg-oligodeoxynucleotides-with-crude-parasite-antigens-reduce-worm-recovery-in-opisthorchis-viverrini-infected-hamsters
#13
Chamraj Kaewraemruaen, Rasana W Sermswan, Surasakdi Wongratanacheewin
Opisthorchis viverrini, a human liver fluke, is still an endemic parasitic infection in Thailand and nearly all countries in Southeast Asia. O. viverrini induces a chronic stage of infection in hamsters. During the first 2 weeks of infection, Th1 inducing cytokine, IL-12, increased but was down regulated in chronic infection. In this study it was found that unmethylated-CpG ODN (oligodeoxynucleotides) 1826 increased hamster mononuclear cell proliferation and stimulated IFN-γ production in vitro. The IFN-γ levels in hamster sera were significantly increased in hamsters injected with CpG ODN 1826 alone or plus crude somatic antigens (CSAg)...
October 11, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27718017/liver-fluke-infection-and-cholangiocarcinoma-a-review
#14
Shuohan Zheng, Yuan Zhu, Zijun Zhao, Zhongdao Wu, Kamolnetr Okanurak, Zhiyue Lv
Parasites are significant groups for carcinogenesis among which liver flukes, including Opisthorchis viverrini and Clonorchis sinensis, are typical representatives causing cholangiocarcinoma (CCA), the second most common primary hepatic malignancy with dismal prognosis. O. viverrini is prevalent in Southeast Asia, infecting 10 million people while C. sinensis has a wider distribution in East Asia and several Southeast Asian countries, affecting more than 35 million people's health. These two worms have some common characteristics and/or discrepancies in life cycle, genome, and transcriptome...
October 8, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27702677/immune-reactivity-in-early-life-stages-of-sea-cage-cultured-pacific-bluefin-tuna-naturally-infected-with-blood-flukes-from-genus-cardicola-trematoda-aporocotylidae
#15
Ylenia Pennacchi, Sho Shirakashi, Barbara F Nowak, Andrew R Bridle
Pacific bluefin tuna (PBT), Thunnus orientalis, due to its high average price on the market is an economically valuable fish species. Infections by blood flukes from the genus Cardicola (Trematoda: Aporocotylidae) represent a growing concern for the cage culture of bluefin tuna in Japan, Australia and Southern Europe. The accumulation of numerous Cardicola eggs in the fish gills causes severe pathology that has been linked to mortality in PBT juveniles up to one year old. The only effective treatment used to mitigate the infection is the oral administration of the antihelminthic drug praziquantel (PZQ) to the affected fish...
October 1, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27693561/transplantation-of-cardicola-opisthorchis-trematoda-aporocotylidae-sporocysts-into-the-intermediate-host-terebella-sp-polychaeta-terebellidae
#16
Yukitaka Sugihara, Toshiyuki Yamada, Shunsuke Iwanaga, Kinya Kanai
Cardicola opisthorchis is a blood fluke pathogen significantly affecting cultured Pacific bluefin tuna Thunnus orientalis in Japan. It is known that the intermediate host of C. opisthorchis is a terebellid polychaete Terebella sp. In order to study the intrapolychaete larval development of C. opisthorchis, we transplanted sporocysts, which contained a large number of cercariae, of C. opisthorchis obtained from Terebella sp. into sporocyst-free Terebella sp., which had been maintained at 20°C. The transplanted sporocysts switched from cercarial to sporocystal production by 17days after transplantation (d...
September 28, 2016: Parasitology International
https://www.readbyqxmd.com/read/27677833/parasitic-and-infectious-diseases-of-the-biliary-tract-in-migrants-and-international-travelers
#17
Christoph Lübbert, Sophie Schneitler
In recent years, global and regional crises have led to extraordinary worldwide migration, accompanied by an increase in long-distance travel from Western countries. Both are linked to a rising incidence of rare parasitic and infectious diseases in first world countries, including in the biliary tract. Areas covered: A selective literature research in PubMed was performed to review the most important parasitic and infectious biliary diseases, which are caused by a wide variety of pathogens and may be latent over long periods, with chronic courses leading to cholangitis, hepatic failure or development of cholangiocarcinoma...
October 4, 2016: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27666946/health-informatics-model-for-helminthiasis-in-thailand
#18
C Nithikathkul, A Trevanich, T Wongsaroj, C Wongsawad, P Reungsang
At the beginning of the new millennium, helminth infections continue to be prevalent, particularly among impoverished populations. This study attempts to create the first health informatics model of helminthiasis in Thailand. The authors investigate how a health informatics model could be used to predict the control and eradication in a national control campaign. Fish-borne helminthiasis caused by Opisthorchis viverrini remains a major public health problem in many parts of South-East Asia, including Thailand, Lao PDR, Vietnam and Cambodia...
September 26, 2016: Journal of Helminthology
https://www.readbyqxmd.com/read/27660439/3-aminopropylsilane-modified-iron-oxide-nanoparticles-for-contrast-enhanced-magnetic-resonance-imaging-of-liver-lesions-induced-by-opisthorchis-felineus
#19
Alexander M Demin, Alexandra G Pershina, Vladimir V Ivanov, Kseniya V Nevskaya, Oleg B Shevelev, Artyom S Minin, Iliya V Byzov, Alexey E Sazonov, Victor P Krasnov, Ludmila M Ogorodova
PURPOSE: Liver fluke causes severe liver damage in an infected human. However, the infection often remains neglected due to the lack of pathognomonic signs. Nanoparticle-enhanced magnetic resonance imaging (MRI) offers a promising technique for detecting liver lesions induced by parasites. MATERIALS AND METHODS: Surface modification of iron oxide nanoparticles produced by coprecipitation from a solution of Fe(3+) and Fe(2+) salts using 3-aminopropylsilane (APS) was carried out...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27644673/factors-associated-with-periductal-fibrosis-diagnosed-by-ultrasonography-screening-among-a-high-risk-population-for-cholangiocarcinoma-in-northeast-thailand
#20
Sutheera Intajarurnsan, Narong Khuntikeo, Nittaya Chamadol, Bandit Thinkhamrop, Supannee Promthet
BACKGROUND: The population in northeast Thailand continues to present with hepatobiliary abnormalities, particularly periductal fibrosis (PDF) which is the result of chronic infection with liver fluke (Opisthorchis viverini; OV) and may lead to the development of cholangiocarcinoma (CCA). Although the prevalence of OV infection has been decreased due to a liver fluke control program over decades, the prevalence of PDF remains high. This study aimed to investigate demographic factors associated with PDF risk based on ultrasonography (US) screening...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
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