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https://www.readbyqxmd.com/read/28407790/ultrastructure-and-localization-of-neorickettsia-in-adult-digenean-trematodes-provides-novel-insights-into-helminth-endobacteria-interaction
#1
Kerstin Fischer, Vasyl V Tkach, Kurt C Curtis, Peter U Fischer
BACKGROUND: Neorickettsia are a group of intracellular α proteobacteria transmitted by digeneans (Platyhelminthes, Trematoda). These endobacteria can also infect vertebrate hosts of the helminths and cause serious diseases in animals and humans. Neorickettsia have been isolated from infected animals and maintained in cell cultures, and their morphology in mammalian cells has been described. However, limited information is available on the morphology and localization of Neorickettsia in the trematode host...
April 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28359900/phylogenetic-position-of-the-genus-gonocerca-manter-1925-trematoda-hemiuroidea-based-on-partial-sequences-of-28s-rrna-gene-and-a-reconsideration-of-taxonomic-status-of-gonocercinae-skrjabin-et-guschanskaja-1955
#2
Sergey G Sokolov, Dmitry M Atopkin, Ilya I Gordeev, Marina B Shedko
Adult trematodes of the genus Gonocerca Manter, 1925, are parasites of marine fishes. Identification of the phylogenetic positions and a revision of the taxonomic status of the subfamily Gonocercinae Skrjabin et Guschanskaja, 1955 (Derogenidae) are the main purposes of this research article. Four Gonocerca species were used in the study, including the type-species G. phycidis Manter, 1925. Molecular phylogenetic analysis, based on partial sequences of 28S rRNA gene, revealed that Gonocerca spp. are phylogenetically distant from other hemiuroid trematodes, including Derogenes varicus (Müller, 1784), representative of the type-genus of the family Derogenidae...
March 27, 2017: Parasitology International
https://www.readbyqxmd.com/read/28327881/feline-platynosomiasis-analysis-of-the-association-of-infection-levels-with-pathological-and-biochemical-findings
#3
Dirceu Guilherme de Souza Ramos, Amanda Raiza Gonçalves Lima Oliveira Santos, Leodil da Costa Freitas, Ísis Assis Braga, Erica Pereira da Silva, Luciana Maria Curtio Soares, Nádia Aline Bobbi Antoniassi, Fernando Henrique Furlan, Richard de Campos Pacheco
Platynosomiasis is a common feline hepatic disease caused by Platynosomum fastosum (Trematoda - Dicrocoelidae), which is also known as 'lizard poisoning'. Most reports of feline platynosomiasis show that this disease is sporadic and manifests with uncommon lesions; its pathogenicity is still not well understood. This study aimed to describe liver injuries and enzymatic changes associated with natural P. fastosum infection in 47 stray cats in an endemic area. Overall, 38.3% (18/47) of cats were parasitized, and 2,358 flukes (P...
January 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28285505/platynosomum-fastosum-trematoda-dicrocoeliidae-from-cats-in-vietnam-morphological-redescription-and-molecular-phylogenetics
#4
Hung Manh Nguyen, Hien Van Hoang, Loan Thi Ho
The present study was performed to reveal the morphological characteristics and molecular phylogenetic position of Platynosomum fastosum Kossack, 1910. A total 167 specimens of P. fastosum were collected in 8 (4.9%) out of 163 sets of gall-bladders and bile ducts of cats. The number of worms was 1-105 per infected cat. This species was characterized by having a long and slender body, slightly larger ventral sucker than the oral sucker, indistinct prepharynx, small pharynx, short esophagus, bifurcation midway between 2 suckers, and ceca extending to the posterior end of the body...
February 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28246533/use-of-molecular-methods-for-the-rapid-mass-detection-of-schistosoma-mansoni-platyhelminthes-trematoda-in-biomphalaria-spp-gastropoda-planorbidae
#5
Roberta Lima Caldeira, Liana Konovaloffi Jannotti-Passos, Omar Dos Santos Carvalho
The low stringency-polymerase chain reaction (LS-PCR) and loop-mediated isothermal amplification (LAMP) assays were used to detect the presence of S. mansoni DNA in (1) Brazilian intermediate hosts (Biomphalaria glabrata, B. straminea, and B. tenagophila) with patent S. mansoni infections, (2) B. glabrata snails with prepatent S. mansoni infections, (3) various mixtures of infected and noninfected snails; and (4) snails infected with other trematode species. The assays showed high sensitivity and specificity and could detect S...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28237483/phylogenetic-analysis-reveals-cryptic-species-diversity-within-minute-intestinal-fluke-stellantchasmus-falcatus-onji-and-nishio-1916-trematoda-heterophyidae
#6
Chalobol Wongsawad, Nattawadee Nantarat, Pheravut Wongsawad
OBJECTIVE: To examine the taxonomic boundaries in the Stellantchasmus populations in different hosts and reveal the cryptic speciation of the Stellantchasmus in Thailand based on both morphological and molecular approaches. METHODS: Stellantchasmus falcatus (S. falcatus) s.l. was collected from different hosts throughout Thailand. The worms were examined and measured. The nuclear ITS2 gene and the mitochondrial COI gene were used to investigate the S. falcatus s...
February 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28215874/first-paleoparasitological-record-of-digenean-eggs-from-a-native-deer-from-patagonia-argentina-cueva-parque-diana-archaeological-site
#7
Beltrame María Ornela, Tietze Eleonor, Pérez Alberto Enrique, Sardella Norma Haydeé
Eggs representative of a digenean species were found in coprolites belonged to an endemic deer from Patagonia. Samples were collected from the archaeological site named "Cueva Parque Diana". This site is a cave located at the Lanín National Park, Neuquén Province, Argentina. The coprolites were dated from 2370±70 to 580±60 years B.P. The eggs were ellipsoidal, operculated, yellowish and thin-shelled. Measurements (n=65) ranged from 120.0 to 142.5 (133.2±6.53) μm long and 62.5 to 87.5 (72.6±6.15) μm wide...
February 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28213655/molecular-characterization-of-the-unique-mesostephanus-appendiculatus-trematoda-cyathocotylidae-by-small-ribosomal-rna-from-egypt
#8
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...
April 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
#9
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
#10
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)...
March 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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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-southeastern-pacific-coast-using-molecular-markers
#20
Natalia Verónica Leiva, Zambra López, María Teresa González, Gabriela Muñoz
Metacercarial stages of digeneans were collected from decapod crustaceans inhabiting intertidal rocky zones in 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...
February 2017: Journal of Parasitology
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