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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
Arpa Surapaitoon, Sutas Suttiprapa, Narong Khuntikeo, Chawalit Pairojkul
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...
October 18, 2016: Parasitology International
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
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
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
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
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
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
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
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
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
Natnapa Padchasuwan, Soraya J Kaewpitoon, Ratana Rujirakul, Parichart Wakkuwattapong, Jun Norkaew, Jirawoot Kujapun, Sukanya Ponphimai, Wasugree Chavenkun, Pontip Kompor, Natthawut Kaewpitoon
The liver fluke Opisthorchis viverrini is a serious health problem in Thailand. Infection is associated with cholangiocarcinoma (CCA), endemic among human populations in northeast and north Thailand where raw fish containing fluke metacercariae are frequently consumed. Recently, Thailand public health authorities have been organized to reduce morbidity and mortality particularly in the northeast through O. viverrini and CCA screening projects. Health modfication is one of activities included in this campaign, but systemic guidelines of modifying and developing health behavior for liver flukes and CCA prevention in communities towards health belief and social support theory are still various and unclear...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
D E Semenov, N A Zhukova, T G Tolstikova, I V Sorokina, E L Lushnikova
The influence of Opisthorchis felineus invasion on the development of pathological changes in the hepatobiliary system was studied in 120 golden hamsters in a long-term experiment (42 weeks) after single infection per os in the dose of 50 metacercariae per animal. The animals were sacrificed on weeks 4, 8, 12, 16, 28 and 42. Chronic experimental infestation with O. felineus triggered a cascade of morphogenetic processes in both extrahepatic and intrahepatic biliary systems. At the early stages of the experiment, polyps and strictures of bile ducts were formed in the lobar bile ducts; in portal tracts, hyperplasia and adenomatous transformation of the newly formed epithelial structures were observed...
August 2016: Bulletin of Experimental Biology and Medicine
Piya Sereerak, Songkaid Upontain, Prasarn Tangkawattana, Frank F Mallory, Banchob Sripa, Sirikachorn Tangkawattana
Opisthorchiasis caused by Opisthorchis viverrini is a major food-borne zoonosis in Greater Mekong sub-region. Even though campaigns discouraging the consumption of raw fish have been launched to public, the disease still remains highly endemic. The unsuccessful eradication of the disease is probably because of the persistence of the parasite in animal reservoir hosts, particularly felids. Praziquantel (PZQ) is the drug of choice for morbidity control of opisthorchiasis in humans and animals. However, there is no specific study on its dosage regimen for feline opisthorchiasis...
August 26, 2016: Parasitology International
Wilawan Pumidonming, Doaa Salman, Dulyatad Gronsang, Abdelbaset E Abdelbaset, Khamphon Sangkaeo, Shin-Ichiro Kawazu, Makoto Igarashi
Gastrointestinal zoonotic helminths of dogs and cats have a public health concern worldwide. We investigated the prevalence of gastrointestinal helminths of zoonotic significance in dogs and cats in lower Northern Thailand and utilized molecular tools for species identification of hookworms and Opisthorchis viverrini. Fecal samples of 197 dogs and 180 cats were collected. Overall prevalence of infection using microscopy was 40.1% in dogs and 33.9% in cats. Helminth infection found in both dogs and cats included hookworms, Spirometra spp...
August 27, 2016: Journal of Veterinary Medical Science
C Kaewraemruaen, R W Sermswan, S Wongratanacheewin
Opisthorchis viverrini causes public health problems in South-East Asia. Recently, TGF-β and IL-10 have been reported to increase in O. viverrini-infected hamsters but the sources of these cytokines are still unknown. In this study, the CD4(+) T cells in infected hamsters were investigated. It was demonstrated that IL-4(+) CD4(+) T cells were significantly increased in hamster spleens and mesenteric lymph nodes (MLNs) during chronic infection. Interestingly, IL-10(+) CD4(+) T cells were also discovered at a significant level while Treg (T regulatory)-like TGF- β(+) CD4(+) T cells were in MLNs of infected hamsters...
August 23, 2016: Parasite Immunology
Aitbay K Bulashev, Sergey N Borovikov, Shynar S Serikova, Zhanbolat A Suranshiev, Vladimir S Kiyan, Saule Z Eskendirova
Monoclonal antibody specific for an epitope of cretory-secretory antigen protein of Opisthorchis felineus (Rivolta, 1884) (Trematoda: Opisthorchiidae) with a molecular weight of 28 kDa was used in a sandwich enzyme-linked immunosorbent assay (ELISA) for immobilisation of liver fluke specific antigen to the solid phase. Examination of human sera by this ELISA compared with commercial assays demonstrated that the monoclonal antibody epitope is located within this significant parasite protein. Anti-idiotypic antibody specific for the paratope of this monoclonal antibody was obtained by a hybridoma technique...
2016: Folia Parasitologica
Olga S Fedorova, Yulia V Kovshirina, Anna E Kovshirina, Marina M Fedotova, Ivan A Deev, Fedor I Petrovskiy, Aleksandr V Filimonov, Alla I Dmitrieva, Lev A Kudyakov, Irina V Saltykova, Peter Odermatt, Ludmila M Ogorodova
Opisthorchis felineus (O. felineus) occurs in Western Siberia and many other parts of the Russian Federation (RF). The true extent of its distribution is not known. Chronic infection may lead to severe hepatobiliary morbidity. According to surgical and experimental reports, long-term infestation might significantly increase the risk for cholangiocarcinoma (CCA). To date, no association between O. felineus infection and CCA has been demonstrated. The objective of this study was to review existing health data on the incidence of O...
July 26, 2016: Parasitology International
Somphou Sayasone, Peter Odermatt, Youthanavanh Vonghachack, Syda Xayavong, Kanpaseuth Senggnam, Urs Duthaler, Kongsap Akkhavong, Jan Hattendorf, Jennifer Keiser
BACKGROUND: Treatment of the liver fluke infection Opisthorchis viverrini relies exclusively on praziquantel. Tribendimidine could be an alternative treatment option. We aimed to assess the efficacy and safety of ascending single, oral doses of tribendimidine in patients with O viverrini infection. METHODS: We did two randomised, parallel-group, single-blind, dose-ranging, phase 2 trials in children (aged 8-14 years) and adults and adolescents (≥15 years) in three O viverrini endemic villages in Champasack province, southern Laos...
October 2016: Lancet Infectious Diseases
Irina V Saltykova, Vjacheslav A Petrov, Maria D Logacheva, Polina G Ivanova, Nikolay V Merzlikin, Alexey E Sazonov, Ludmila M Ogorodova, Paul J Brindley
BACKGROUND: There is increasing interest in the microbiome of the hepatobiliary system. This study investigated the influence of infection with the fish-borne liver fluke, Opisthorchis felineus on the biliary microbiome of residents of the Tomsk region of western Siberia. METHODOLOGY/PRINCIPAL FINDINGS: Samples of bile were provided by 56 study participants, half of who were infected with O. felineus, and all of who were diagnosed with gallstone disease. The microbiota of the bile was investigated using high throughput, Illumina-based sequencing targeting the prokaryotic 16S rRNA gene...
July 2016: PLoS Neglected Tropical Diseases
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