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https://www.readbyqxmd.com/read/29329624/apparent-prevalence-of-and-risk-factors-for-infection-with-ostertagia-ostertagi-fasciola-hepatica-and-dictyocaulus-viviparus-in-swiss-dairy-herds
#1
C F Frey, R Eicher, K Raue, C Strube, M Bodmer, B Hentrich, B Gottstein, N Marreros
Infections with helminth parasites can negatively affect performance of dairy cows. Knowledge on infection intensity, spatial distributions and risk factors are key to develop targeted treatment strategies. Canada and most EU countries have conducted large investigations, but respective data for Switzerland were missing. We now performed a bulk tank milk serosurvey for Ostertagia ostertagi, Fasciola hepatica, and Dictyocaulus viviparus on a total of 1036 voluntarily participating dairy herds that were sampled at confinement periods, i...
January 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29329618/vaccination-against-fasciola-hepatica-using-cathepsin-l3-and-b3-proteases-delivered-alone-or-in-combination
#2
Agnieszka Wesołowska, Katarzyna Basałaj, Luke J Norbury, Alicja Sielicka, Halina Wędrychowicz, Anna Zawistowska-Deniziak
No licensed vaccine is currently available for prevention of Fasciola hepatica infections. However, considering the alarming increase in drug resistance, there is an urgent need for a safe and fully effective vaccine against fasciolosis. Here, we tested if cathepsins L (FhCL3-1, FhCL3-2) and B (FhCB3) secreted by juvenile liver flukes are viable vaccine targets when delivered alone or in combination in a rat model. Since control over the early immune response is crucial for parasite's establishment in its host, it was hypothesised that targeting fluke juvenile stages may prove beneficial...
January 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29321187/infection-by-the-helminth-parasite-fasciola-hepatica-requires-rapid-regulation-of-metabolic-virulence-and-invasive-factors-to-adjust-to-its-mammalian-host
#3
Krystyna Cwiklinski, Heather Jewhurst, Paul McVeigh, Tara Barbour, Aaron G Maule, Jose Tort, Sandra M O'Neill, Mark W Robinson, Sheila Donnelly, John P Dalton
The parasite Fasciola hepatica infects a broad range of mammals with impunity.  Following ingestion of parasites (metacercariae) by the host, newly excysted juveniles (NEJ) emerge from their cysts, rapidly penetrate the duodenal wall and migrate to the liver.  Successful infection takes just a few hours and involves negotiating hurdles presented by host macromolecules, tissues and micro-environments, as well as the immune system.  Here, transcriptome and proteome analysis of ex vivo F. hepatica metacercariae and NEJ reveal the rapidity and multitude of metabolic and developmental alterations that take place in order for the parasite to establish infection...
January 10, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29318989/study-on-the-relationship-between-liver-parasitic-infections-and-serum-vitamin-a-and-%C3%AE-carotene-status-in-cattle
#4
Ghader Jalilzadeh-Amin, Bijan Esmaeilnejad, Farhad Farhang-Pajuh
OBJECTIVE: This study was conducted to evaluate the relationship between serum levels of vitamin A and β-carotene in the liver of cattle. METHODS: A total number of 150 samples were selected according to the type of parasitic infections of the liver after postmortem examination and confirmation. Parasitic lesions in the liver were subdivided into three major parasites, including Fasciola hepatica, Dicrocoelium dendriticum, and hydatid cysts. Fifty samples were obtained from cattle without any parasitic infection as a control group...
December 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29318988/morphometric-and-molecular-study-of-fasciola-isolates-from-ruminants-in-iran
#5
Elham Akhlaghi, Mohammad Ali Mohammadi, Naser Ziaali, Mohammad Reza Baneshi, Saeid Nasibi, Hossein Kamyabi, Sima Rostami, Majid Fasihi Harandi
OBJECTIVE: The purpose of the present study was morphometric and molecular characterization of Fasciola isolates from ruminants in Iran. METHODS: Flukes were collected from the livers of 54 naturally infected sheep and cattle. The proportion of body length to width (L/W) of each fresh fluke was measured using a digital caliper. We employed receiver operating characteristic (ROC) curve analysis to explore the reliability of L/W for differentiating the two species...
December 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29284483/bovine-tuberculosis-visible-lesions-in-cattle-culled-during-herd-breakdowns-the-effects-of-individual-characteristics-trade-movement-and-co-infection
#6
Andrew W Byrne, Jordon Graham, Craig Brown, Aoibheann Donaghy, Maria Guelbenzu-Gonzalo, Jim McNair, Robin Skuce, Adrian Allen, Stanley McDowell
BACKGROUND: Bovine tuberculosis (bTB), caused by Mycobacterium bovis, remains a significant problem for livestock industries in many countries worldwide including Northern Ireland, where a test and slaughter regime has utilised the Single Intradermal Comparative Cervical Tuberculin (SICCT) test since 1959. We investigated the variation in post-mortem confirmation based on bTB visible lesion (VL) presence during herd breakdowns using two model suites. We investigated animal-level characteristics, while controlling for herd-level factors and clustering...
December 29, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29241030/expression-profiles-of-genes-involved-in-tlrs-and-nlrs-signaling-pathways-of-water-buffaloes-infected-with-fasciola-gigantica
#7
Fu-Kai Zhang, Jun-Ling Hou, Ai-Jiang Guo, Ai-Ling Tian, Zhao-An Sheng, Wen-Bin Zheng, Wei-Yi Huang, Hany M Elsheikha, Xing-Quan Zhu
Infection of ruminants and humans with Fasciola gigantica is attracting increasing attention due to its economic impact and public health significance. However, little is known of innate immune responses during F. gigantica infection. Here, we investigated the expression profiles of genes involved in Toll-like receptors (TLRs) and NOD-like receptors (NLRs) signaling pathways in buffaloes infected with 500F. gigantica metacercariae. Serum, liver and peripheral blood mononuclear cell (PBMC) samples were collected from infected and control buffaloes at 3, 10, 28, and 70days post infection (dpi)...
December 11, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29235505/comprehensive-analysis-of-the-catalytic-and-structural-properties-of-a-mu-class-glutathione-s-transferase-from-fasciola-gigantica
#8
Jupitara Kalita, Rohit Shukla, Harish Shukla, Kundlik Gadhave, Rajanish Giri, Timir Tripathi
Glutathione S‒transferases (GSTs) play an important role in the detoxification of xenobiotics. They catalyze the nucleophilic addition of glutathione (GSH) to nonpolar compounds, rendering the products water-soluble. In the present study, we investigated the catalytic and structural properties of a mu-class GST from Fasciola gigantica (FgGST1). The purified recombinant FgGST1 formed a homodimer composed of 25 kDa subunit. Kinetic analysis revealed that FgGST1 displays broad substrate specificity and shows high GSH conjugation activity toward 1-chloro-2,4-dinitrobenzene, 4-nitroquinoline-1-oxide, and trans-4-phenyl-3-butene-2-one and peroxidase activity towards trans-2-nonenal and hexa-2,4-dienal...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29232690/rna-interference-in-fasciola-gigantica-establishing-and-optimization-of-experimental-rnai-in-the-newly-excysted-juveniles-of-the-fluke
#9
Arun Anandanarayanan, Opinder Krishen Raina, Hniang Lalrinkima, Ajayta Rialch, Muthu Sankar, Anju Varghese
Fasciolosis caused by Fasciola gigantica is a neglected tropical disease but a constraint on the growth and productivity of cattle, buffaloes and sheep in the tropical countries of Asia and Africa. Resistance to commonly used anthelmintics in Fasciola has increased the need to search for alternative therapeutic targets. RNA interference is the current tool of choice in the search for such targets in Fasciola. The susceptibility of juvenile Fasciola hepatica to double stranded (ds) RNA induced RNAi has been established but in F...
December 12, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29216911/dynamic-expression-of-cytokine-and-transcription-factor-genes-during-experimental-fasciola-gigantica-infection-in-buffaloes
#10
Wei Shi, Zhi-Yong Wei, Hany M Elsheikha, Fu-Kai Zhang, Zhao-An Sheng, Ke-Jing Lu, Dong-Ying Wang, Wei-Yi Huang, Xing-Quan Zhu
BACKGROUND: Determining the mechanisms involved in the immune-pathogenesis of the tropical liver fluke, Fasciola gigantica, is crucial to the development of any effective therapeutic intervention. Here, we examined the differential gene expression of cytokines and transcription factors in the liver of F. gigantica-infected buffaloes, over the course of infection. METHODS: Water buffaloes (swamp type) were infected orally with 500 F. gigantica encysted metacercariae...
December 8, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29199372/comparative-assessment-of-recombinant-and-native-immunogenic-forms-of-fasciola-hepatica-proteins-for-serodiagnosis-of-sheep-fasciolosis
#11
Kobra Mokhtarian, Ahmad Reza Meamar, Majid Khoshmirsafa, Elham Razmjou, Leila Masoori, Majid Khanmohammadi, Lame Akhlaghi, Reza Falak
Laboratory diagnosis of sheep fasciolosis is commonly performed by coprological examinations; however, this method may lead to false negative results during the acute phase of the infection. Furthermore, the poor sensitivity of coprological methods is considered to be a paradox in the chronic phase of the infection. In this study, we compared the immunoreactivity of native and recombinant forms of Fasciola hepatica excretory/secretory antigens and determined their capabilities for the development of F. hepatica-specific immunoassays...
December 4, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29187710/hybrid-origin-of-asian-aspermic-fasciola-flukes-is-confirmed-by-analyzing-two-single-copy-genes-pepck-and-pold
#12
Kei Hayashi, Madoka Ichikawa-Seki, Uday Kumar Mohanta, Takuya Shoriki, Pannigan Chaichanasak, Tadashi Itagaki
Nuclear gene markers, phosphoenolpyruvate carboxykinase (pepck) and DNA polymerase delta (pold), have been developed for precise discrimination of Fasciola flukes instead of internal transcribed spacer 1. In this study, these two genes of 730 Fasciola flukes from eight Asian countries were analyzed. The results were compared with their mitochondrial NADH dehydrogenase subunit 1 (nad1) lineages for obtaining a definitive evidence of the hybrid origin of aspermic Fasciola flukes. All the flukes categorized into the aspermic nad1 lineages possessed both the fragment patterns of F...
November 29, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29185852/lethal-fascioliasis-in-capybaras-hydrochoerus-hydrochaeris-in-brazil
#13
Marcelo Bahia Labruna, Francisco Costa, Marcio Port-Carvalho, Alice Oliveira, Silvio Souza, Marcio Castro
The liver fluke Fasciola hepatica (Trematoda: Fasciolidae) causes fascioliasis, which affects mostly domestic ruminants and humans worldwide. This parasite has an Old World origin and was introduced into the New World by European colonizers. Capybara (Hydrochoerus hydrochaeris) is the largest living rodent species, with adults weighing over 60 kg. We report a fascioliasis outbreak caused by F. hepatica, that reduced a capybara group from 21 to 2 animals within a 9-mo period. Animal infection and associated lesions were confirmed by post-mortem examinations, which revealed extensive liver damage associated with the presence of large number of adult and immature forms of F...
November 29, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/29184371/epidemiology-of-bovine-fascioliasis-in-the-nile-delta-region-of-egypt-its-prevalence-evaluation-of-risk-factors-and-its-economic-significance
#14
Abdelgawad S El-Tahawy, Eman K Bazh, Reda E Khalafalla
Aim: This study focuses on the risk factors associated with the prevalence of Fasciola affecting cattle population in three provinces belonging to the Nile Delta of Egypt and to estimate the economic losses as a result of fascioliasis. Materials and Methods: From January 2015 to end of December 2015, records of 21 farms (4976 cattle) were analyzed to screen the prevalence of fascioliasis among cattle farms, to identify its associated risk factors and its economic impacts on Nile Delta region of Egypt...
October 2017: Veterinary World
https://www.readbyqxmd.com/read/29184364/seroprevalence-of-fasciolagigantica-infection-in-bovines-using-cysteine-proteinase-dot-enzyme-linked-immunosorbent-assay
#15
Niranjan Kumar, Anju Varghese, J B Solanki
Aim: The objective of the present study was to know the seroprevalence status of Fasciola gigantica infection in cattle and buffaloes using cysteine proteinase (CP) antigen in dot enzyme-linked immunosorbent assay (ELISA) format under field conditions. Materials and Methods: As per the standard protocol, the sera were collected from the blood of 112 cattle and 38 buffaloes of coastal areas of Navsari district, South Gujarat, India. The indirect ELISA was performed on the strip of nitrocellulose paper blotted with 1 µl of CP antigen, to detect F...
October 2017: Veterinary World
https://www.readbyqxmd.com/read/29173540/characterization-of-multiple-life-stages-of-two-australian-fasciola-hepatica-isolates-in-sheep
#16
S D George, K Baker, L Lake, K Vanhoff, R D'Arcy, D Emery, P F Rolfe
Information on the susceptibility status of Fasciola hepatica isolates is lacking in the literature, even for those isolates considered to be laboratory reference strains. Four controlled efficacy studies were conducted on two Fasciola hepatica isolates from Australia, viz. 'Oberon' and 'Sunny Corner' with treatment at either 2, 6 or 10 weeks post-infection (wpi) as defined in each study. Fluke burdens and examination of livers occurred at necropsy in weeks 12 (Study 1) or 13 (Studies 2, 3 and 4) post-infection...
December 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/29169803/expression-purification-and-characterization-of-two-leucine-aminopeptidases-of-the-blood-fluke-schistosoma-mansoni
#17
Gabriela Maggioli, Gabriel Rinaldi, Ines Giaudrone, Patricia Berasain, José F Tort, Paul J Brindley, Carlos Carmona
Schistosomiasis is a major neglected tropical disease (NTD) and considered the most important of the human helminthiases in terms of morbidity and mortality. Whereas treatment with praziquantel has been effective since the 1980s, the potential for the emergence of drug resistance has propelled the search for new interventions. Studies have revealed key roles of proteases in parasitic helminths during establishment of infection, tissue invasion, immune evasion, parasite feeding and development throughout the different developmental stages, pinpointing them as possible candidates...
November 20, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/29161330/fasciola-spp-mapping-of-the-mf6-epitope-and-antigenic-analysis-of-the-mf6p-hdm-family-of-heme-binding-proteins
#18
Victoria Martínez-Sernández, María J Perteguer, Mercedes Mezo, Marta González-Warleta, Teresa Gárate, M Adela Valero, Florencio M Ubeira
MF6p/FhHDM-1 is a small cationic heme-binding protein which is recognized by the monoclonal antibody (mAb) MF6, and abundantly present in parenchymal cells and secreted antigens of Fasciola hepatica. Orthologs of this protein (MF6p/HDMs) also exist in other causal agents of important foodborne trematodiasis, such as Clonorchis sinensis, Opisthorchis viverrini and Paragonimus westermani. Considering that MF6p/FhHDM-1 is relevant for heme homeostasis in Fasciola and was reported to have immunomodulatory properties, this protein is expected to be a useful target for vaccination...
2017: PloS One
https://www.readbyqxmd.com/read/29160354/dynamics-of-haemocytes-from-pseudosuccinea-columella-circulating-infected-by-fasciola-hepatica
#19
Vinicius Marques Antunes Ribeiro, Aytube Lucas Coaglio, Fernando Luiz Pereira Oliveira, Cíntia Aparecida de Jesus Pereira, Walter Dos Santos Lima
The lymnaeids are important in the epidemiology of Fasciola hepatica, a neglected and endemic zoonosis. The interaction between the internal defense system of Pseudosuccinea columella and F. hepatica has been little studied. In the present study the effect of infection by F. hepatica on P. columella circulating haemocytes was investigated. Changes in the average number of total circulating haemocytes have been observed at 30 minutes post-infection and 1, 7, 10, 14, 21, 28 and 50 days post-infection (dpi). Miracidia were observed head-foot and mantle at 30 minutes post-infection...
November 9, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/29158867/hepatic-fascioliasis-presenting-with-bile-duct-obstruction-a-case-report
#20
Rachid Lefryekh, Ahmed Bensaad, Fatimazahra Bensardi, Khalid Elhattabi, Mounir Bouali, Bessam Daif, Abdelaziz Fadil, Zakaria Jaouhari, Tazi Hicham, Aziz Hamdani, Maha Soussi Abdalaoui
Fascioliasis is a zoonotic infection caused by a liver trematode: fasciola hepatica; which commonly affects cattle and sheep, humans are accidental hosts. Several cases have been reported in the literature worldwide with a large geographical distribution. We present a case of bile duct obstruction due to a hepatic fascioliasis, successfully treated with both a combined surgical and medical approaches. A high index of suspicion should be kept in mind for all cases of obstructive jaundice, especially in areas in which human fascioliasis infection is repeatedly reported...
2017: Pan African Medical Journal
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