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https://www.readbyqxmd.com/read/28213655/molecular-characterization-of-the-unique-mesostephanus-appendiculatus-trematoda-cyathocotylidae-by-small-ribosomal-rna-from-egypt
#1
Nasr M El-Bahy, Eman K Bazh, Shimaa S Sorour, Nagwa M Elhawary
M esostephanus appendiculatus (Family: Cyathocotylidae) is one of the unique trematodes that complete their cycles in human and animal intestines in many countries of the world. The main source of its transmission is eating raw or undercooked infected fish muscle. Earliest analyses of genes to different parasites supported the analysis of helminthes either biological or morphological. This paper detected M. appendiculatus sequence with GenBank accession number gb (KY026782). Comparison of M. appendiculatus with other helminthes using BioEdit 7 and MEGA7 program shows some similarity in different points along its sequence...
February 18, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28131768/brachylaima-ezohelicis-sp-nov-trematoda-brachylaimidae-found-from-the-land-snail-ezohelix-gainesi-with-a-note-of-an-unidentified-brachylaima-species-in-hokkaido-japan
#2
Minoru Nakao, Tsukasa Waki, Mizuki Sasaki, Jason L Anders, Daisuke Koga, Mitsuhiko Asakawa
In the Japanese Archipelago, Ezohelix gainesi, a member of bradybaenid land snails, is endemic mainly to the island of Hokkaido. During July to August of 2016, a survey to detect trematode infections from E. gainesi was carried out at a forest city park in Asahikawa, Hokkaido. Systemic infections of the snails with sporocysts containing short-tailed cercariae were found in 5.3% of 94 individuals examined. Furthermore, most of them (90.4%) harbored non-encysted metacercariae within their kidneys. A DNA sequence identification revealed that both of the sporocyst and the metacercaria belong to an unknown species of the family Brachylaimidae...
January 25, 2017: Parasitology International
https://www.readbyqxmd.com/read/28131660/light-and-scanning-electron-microscopy-study-of-in%C3%A2-vitro-effects-of-artesunate-in-newly-excysted-metacercariae-of-echinostoma-paraensei-trematoda-digenea
#3
Joyce G R Souza, Eduardo J Lopes Torres, Juberlan S Garcia, Ana Paula N Gomes, Rosangela Rodrigues-Silva, Arnaldo Maldonado, José Roberto Machado-Silva
Chemotherapy of food-borne trematodes relies on two drugs, praziquantel and tricabendazole, and there is growing interest in finding alternative therapies. Plant oil extracts have long been used in traditional Chinese medicine as sources of bioactive compounds with antiparasitic activity. Species of the genus Echinostoma are used as good models to test effective compounds against food-borne trematodes. This study evaluated the anthelmintic activity of crude artesunate extracts in vitro on newly excysted metacercariae of Echinostoma paraensei by light and scanning electron microscopy (SEM)...
January 25, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28003149/elucidation-of-the-first-definitively-identified-life-cycle-for-a-marine-turtle-blood-fluke-trematoda-spirorchiidae-enables-informed-control
#4
Thomas H Cribb, Jose L Crespo-Picazo, Scott C Cutmore, Brian A Stacy, Phoebe A Chapman, Daniel García-Párraga
Blood flukes of the family Spirorchiidae are significant pathogens of both free-ranging and captive marine turtles. Despite a significant proportion of marine turtle mortality being attributable to spirorchiid infections, details of their life cycles remain almost entirely unknown. Here we report on the molecular elucidation of the complete life cycle of a marine spirorchiid, identified as Amphiorchis sp., infecting vermetid gastropods and captive hatched neonate Caretta caretta in the Oceanogràfic Aquarium, in Valencia, Spain...
December 18, 2016: International Journal for Parasitology
https://www.readbyqxmd.com/read/27988675/a-new-species-of-i-auriculostoma-i-trematoda-allocreadiidae-from-the-intestine-of-i-brycon-i-i-guatemalensis-i-characiformes-bryconidae-from-the-usumacinta-river-basin-mexico-based-on-morphology-and-28s-rdna-sequences-with-a-key-to-species-of-the-genus
#5
David Iván Hernández-Mena, Christina Lynggaard, Berenit Mendoza-Garfias, Gerardo Pérez-Ponce DE León
We describe a new species of Auriculostoma Scholz, Aguirre-Macedo & Choudhury, 2004 based on several sources of information including morphology (light and scanning electron microscopy [SEM]), sequences of two nuclear genes, host association, and geographical distribution. Morphologically, the new species most closely resembles Auriculostoma astyanace Scholz, Aguirre-Macedo & Choudhury, 2004, but differs by having deeply lobated testes and cirrus-sac extending posteriorly to seminal receptacle level. Auriculostoma lobata n...
November 22, 2016: Zootaxa
https://www.readbyqxmd.com/read/27914977/trematodes-with-a-reproductive-division-of-labour-heterophyids-also-have-a-soldier-caste-and-early-infections-reveal-how-colonies-become-structured
#6
Ana E Garcia-Vedrenne, Anastasia C E Quintana, Andrea M DeRogatis, Christina M Dover, Maribel Lopez, Armand M Kuris, Ryan F Hechinger
Recent findings have extended the documentation of complex sociality to the Platyhelminthes, describing the existence of a reproductive division of labour involving a soldier caste among the parthenitae of trematode parasites. However, all species examined to date occupy high positions in trematode interspecific dominance hierarchies and belong to two closely related families, the Echinostomatidae and the Philophthalmidae (Superfamily Echinostomatoidea). Further, the two species documented as lacking soldiers also belong to the Echinostomatidae...
November 30, 2016: International Journal for Parasitology
https://www.readbyqxmd.com/read/27903316/genetic-divergence-of-human-pathogens-nanophyetus-spp-trematoda-troglotrematidae-on-the-opposite-sides-of-the-pacific-rim
#7
A N Voronova, G N Chelomina, V V Besprozvannykh, V V Tkach
Human and animal nanophyetiasis is caused by intestinal flukes belonging to the genus Nanophyetus distributed on both North American and Eurasian coasts of Northern Pacific. In spite of the wide geographical distribution and medical and veterinary importance of these flukes, the intra-generic taxonomy of Nanophyetus spp. remains unresolved. The two most widely distributed nominal species, Nanophyetus salmincola and Nanophyetus schikhobalowi, both parasitizing humans and carnivorous mammals, were described from North America and eastern Eurasia, respectively...
December 1, 2016: Parasitology
https://www.readbyqxmd.com/read/27890078/animal-fascioliasis-perspectives-from-high-altitudinal-regions
#8
Damanbha Lyngdoh, Sunil Sharma, Bishnupada Roy, Veena Tandon
The parasitic flukes of the genus Fasciola (Platyhelminthes: Trematoda: Digenea) cause fascioliasis or liver-rot disease in ruminant livestock in tropical and sub-tropical regions of the world. Classically, two species of Fasciola- F. hepatica and F. gigantica, are universally recognized as taxonomically valid species. Our survey studies on ovid and bovid animals including yak and mithun from high altitudinal mountainous regions in Northeast India revealed the occurrence of Fasciola gigantica and also Fasciola sp...
December 15, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27871817/two-known-and-one-new-species-of-proctoeces-from-australian-teleosts-variable-host-specificity-for-closely-related-species-identified-through-multi-locus-molecular-data
#9
Nicholas Q-X Wee, Thomas H Cribb, Rodney A Bray, Scott C Cutmore
Species of Proctoeces Odhner, 1911 (Trematoda: Fellodistomidae) have been reported from a wide range of marine animals globally. Members of the genus tend to lack strongly distinguishing morphological features for diagnosis, making identification difficult and the true number of species in the genus contentious. Combined morphological and molecular analyses were used to characterise three species of Proctoeces from Moreton Bay and the southern Great Barrier Reef. Data for two ribosomal regions and one mitochondrial region were generated for specimens collected from Australia...
April 2017: Parasitology International
https://www.readbyqxmd.com/read/27836745/metagonimus-suifunensis-sp-n-trematoda-heterophyidae-from-the-russian-southern-far-east-morphology-life-cycle-and-molecular-data
#10
P G Shumenko, Y V Tatonova, V V Besprozvannykh
The trematode from the Russian Southern Far East, earlier defined as M. yokogawai Katsuradai, 1912, was determined as a representative of the new species Metagonimus suifunensis sp. n. The life cycle of this trematode was experimentally studied and morphometric data for the cercariae, metacercariae and adult worm stages were obtained. The molecular data for samples from six Russian localities were received using the ITS1-5.8S-ITS2 region and 28S gene nuclear ribosomal DNA. The results revealed that M. suifunensis sp...
February 2017: Parasitology International
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
#11
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...
February 2017: Parasitology International
https://www.readbyqxmd.com/read/27831461/central-european-parasitic-flatworms-of-the-cyclocoelidae-stossich-1902-trematoda-plagiorchiida-molecular-and-comparative-morphological-analysis-suggests-the-reclassification-of-cyclocoelum-obscurum-leidy-1887-into-the-harrahium-witenberg-1926
#12
Jiljí Sitko, Jiří Bizos, Petr Heneberg
Cyclocoelidae Stossich, 1902 are medium-sized to large digenean bird parasites. Although these parasites bear few visible autapomorphic signs, and their diagnostic characters are unstable in response to the pressure applied during preparation, the numerous hitherto suggested re-classifications within the family have not been supported by any molecular analysis. We analyse here cyclocoelids found during the extensive examination of central European birds performed from 1962 to 2016, provide comparative measurements, host spectra, prevalence and intensity, and provide and analyse sequences of four DNA loci of five of the cyclocoelid species...
November 10, 2016: Parasitology
https://www.readbyqxmd.com/read/27809699/determining-intermediate-hosts-for-opecoelidae-and-microphallidae-species-platyhelminthes-trematoda-in-the-south-eastern-pacific-coast-using-molecular-markers
#13
Natalia Leiva, Zambra Lã  Pez, Marà  A Teresa Gonzà  Lez, Gabriela Muà  Oz
Metacercarial stages of digeneans were collected from decapod crustaceans inhabiting intertidal rocky zone of central Chile. The digeneans were identified through a molecular analysis based on the V4 region of the 18S ribosomal RNA gene. We analyzed 356 crustaceans belonging to 10 species, 115 intertidal fish belonging to 6 species and 4 specimens of 1 coastal bird species. In total, 74.1% of crustaceans were parasitized with metacercariae. We found 1 species of Opecoelidae. This species showed low genetic divergence (0% and 0...
November 3, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27787216/a-morphological-study-of-diplodiscus-subclavatus-pallas-1760-trematoda-diplodiscidae-adults-from-the-accidental-host-viviparus-contectus-millet-1813-caenogastropoda-viviparidae
#14
Anna Cichy, Elżbieta Żbikowska
A phenomenon of switching of the parasite in the food chain to an accidental host is commonly observed in nature. However, there is little available data concerning the morphological descriptions of parasites that passively get into the atypical hosts and are capable, at least to some degree, of somatic growth and development of reproductive structures. A morphological survey of Diplodiscus subclavatus (Pallas, 1760) adults isolated from a digestive tract of an accidental host, Viviparus contectus (Millet, 1813), was carried out...
December 1, 2016: Acta Parasitologica
https://www.readbyqxmd.com/read/27787209/a-genetic-structure-of-novel-population-of-fascioloides-magna-from-poland-podkarpackie-province-indicates-an-expanding-second-european-natural-focus-of-fascioloidosis
#15
Ľudmila Juhásová, Eva Bazsalovicsová, Ivica Králová-Hromadová, Jacek Karamon
The veterinary important parasite of ruminants, giant liver fluke Fascioloides magna(Trematoda: Fasciolidae), isolated from liver of farmed fallow deer (Dama dama) from Podkarpackie Province (southeastern Poland) was genotypized by mitochondrial cytochrome c oxidase (cox1) and nicotinamide dehydrogenase (nad1) markers. The data on this newly emerged population were compared with mitochondrial haplotypes of recently detected Polish population of F. magna from Lower Silesian Wilderness (southwestern Poland) and with European populations of the parasite from all three natural foci; northern Italy, Czech Republic and the Danube floodplain forests...
December 1, 2016: Acta Parasitologica
https://www.readbyqxmd.com/read/27776999/first-detection-of-allobilharzia-visceralis-schistosomatidae-trematoda-from-cygnus-cygnus-in-japan
#16
Kei Hayashi, Madoka Ichikawa-Seki, Yuma Ohari, Uday Kumar Mohanta, Junya Aita, Hiroshi Satoh, Shiori Ehara, Minami Tokashiki, Tomoko Shiroma, Ayumi Azuta, Nozomi Oka, Takuya Watanabe, Ryo Harasawa, Satoshi Inohana, Toshihiro Ichijo, Kazuhisa Furuhama
Adult schistosomes were detected in the veins or capillaries of the large intestine, mesentery, liver, and adrenal glands in eight of 13 whooper swans (Cygnus cygnus) examined in Iwate Prefecture, Japan. However, neither eggs nor severe tissue injuries were observed in any of the swans. The schistosomes were definitively identified as Allobilharzia visceralis based on the nucleotide sequences of the ribosomal internal transcribed spacer (ITS) region. Allobilharzia visceralis infections have been reported in whooper swan in Iceland and tundra swan (Cygnus columbianus) in North America...
February 2017: Parasitology International
https://www.readbyqxmd.com/read/27762668/platynosomum-illiciens-trematoda-dicrocoeliidae-in-captive-black-tufted-marmoset-callithrix-penicillata-primates-cebidae-from-brazil-a-morphometric-analyses-with-taxonomic-comments-on-species-of-platynosomum-from-nonhuman-primates
#17
Hudson Alves Pinto, Vitor Luis Tenà Rio Mati, Diego Florencio Pujoni, Alan Lane de Melo
The trematodes belonging to the genus Platynosomum are biliary parasites of birds and mammals (domestic and wildlife) in tropical and subtropical areas of the globe. Despite several reports on platynosomosis in captive nonhuman primates, mainly in South America, the taxonomy of species of Platynosomum that infect these hosts remains confused, and it is not clear whether the species found in cats is the same that infects nonhuman primates. Because a detailed morphological study of Platynosomum from nonhuman primates is lacking, in this study we analyzed specimens of Platynosomum recovered from the biliary system of Callithrix penicillata kept in captivity in an animal facility...
October 20, 2016: Journal of Parasitology
https://www.readbyqxmd.com/read/27743235/a-new-species-of-microphallid-trematoda-digenea-infecting-a-novel-host-family-the-muraenidae-on-the-northern-great-barrier-reef-australia
#18
Olena Kudlai, Thomas H Cribb, Scott C Cutmore
A new species of microphallid, Longiductotrema tethepae n. sp., is reported from a muraenid eel Gymnothorax pseudothyrsoideus (Bleeker) on the northern Great Barrier Reef. The new species is described based on adults from Gy. pseudothyrsoideus and metacercariae from a grapsid crab, Grapsus albolineatus Latreille in Milbert, collected from off Lizard Island, Queensland, Australia. The new species is assigned to Longiductotrema Deblock & Heard, 1969 based on morphological characters (presence of a cirrus-sac; a long metraterm, intensively ensheathed by gland-cells; an entirely postcaecal uterus; vitellarium composed of two lateral clusters each of about ten follicles, situated in the testicular and post-testicular areas)...
November 2016: Systematic Parasitology
https://www.readbyqxmd.com/read/27737705/population-structure-and-dispersal-routes-of-an-invasive-parasite-fascioloides-magna-in-north-america-and-europe
#19
Ludmila Juhásová, Ivica Králová-Hromadová, Eva Bazsalovicsová, Gabriel Minárik, Jan Štefka, Peter Mikulíček, Lenka Pálková, Margo Pybus
BACKGROUND: Fascioloides magna (Trematoda: Fasciolidae) is an important liver parasite of a wide range of free-living and domestic ruminants; it represents a remarkable species due to its large spatial distribution, invasive character, and potential to colonize new territories. The present study provides patterns of population genetic structure and admixture in F. magna across all enzootic regions in North America and natural foci in Europe, and infers migratory routes of the parasite on both continents...
October 13, 2016: Parasites & Vectors
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
#20
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...
November 2016: Fish & Shellfish Immunology
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