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Trematoda

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https://www.readbyqxmd.com/read/28807668/evidence-that-blood-flukes-trematoda-aporocotylidae-of-chondrichthyans-infect-bivalves-as-intermediate-hosts-indications-of-an-ancient-diversification-of-the-schistosomatoidea
#1
Thomas H Cribb, Rowan C Chick, Wayne O'Connor, Stephan O'Connor, Daniel Johnson, Kim B Sewell, Scott C Cutmore
Blood flukes (Aporocotylidae) of actinopterygians (bony fishes), have been shown to infect freshwater gastropods and marine polychaetes as intermediate hosts. However, no life cycle is known for any aporocotylid of chondrichthyans (cartilaginous fishes) and no adult aporocotylid has been linked to a cercaria infecting a bivalve. Here we report two novel infections that fill these gaps. Cercariae consistent with the family Aporocotylidae were found developing in sporocysts in the gonad of the surf pipi, Donax deltoides Lamarck, 1818 (Bivalvia: Donacidae), from Stockton Beach, central New South Wales, Australia...
August 11, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28799088/metazoan-parasites-from-odontocetes-off-new-zealand-new-records
#2
Kristina Lehnert, Haseeb Randhawa, Robert Poulin
Information about the parasite fauna of spectacled porpoises and cetaceans from New Zealand waters in general is scarce. This study takes advantage of material archived in collections of the Otago Museum in Dunedin and Massey University in Auckland, sampled from cetacean species found stranded along the New Zealand coastline between 2007 and 2014. Parasites from seven species of cetaceans (spectacled porpoise, Phocoena dioptrica (n = 2 individuals examined); pygmy sperm whale (n = 1); long-finned pilot whale, Globicephala melas (n = 1); Risso's dolphin, Grampus griseus (n = 1); short-beaked common dolphin, Delphinus delphis (n = 7); striped dolphin, Stenella coeruleoalba (n = 3) and dusky dolphin, Lagenorhynchus obscurus (n = 2)) from the respiratory and gastro-intestinal tract, cranial sinus, liver, urogenital and mammary tract, fascia and blubber were investigated...
August 10, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28769607/type-material-of-platyhelminthes-housed-in-the-helminthological-collection-of-the-oswaldo-cruz-institute-fiocruz-chioc-rio-de-janeiro-brazil-from-1979-to-2016-rhabditophora-trematoda-and-cestoda
#3
Daniela A Lopes, Adriana Mainenti, Marcelo Knoff, Delir Corrêa Gomes
The second part of the catalogue of type material deposited in the Helminthological Collection of the Oswaldo Cruz Institute/ FIOCRUZ (CHIOC), between 1979 and 2016, is presented, to complement the first list of all types that was published in 1979. This part includes Platyhelminthes other than monogenoids, which were covered in the first part published in September 2016. The present catalogue comprises type material for 104 species, distributed across three classes, 40 families and 75 genera. Species names are listed systematically, followed by type host, infection site, type locality and specimens with their collection numbers and references...
2017: ZooKeys
https://www.readbyqxmd.com/read/28754617/infection-by-schistosoma-mansoni-during-pregnancy-effects-on-offspring-immunity
#4
REVIEW
Vanessa Ribeiro Figliuolo da Paz, Danielly Sequeira, Alexandre Pyrrho
About 25 million Brazilians live in areas at risk of contracting the disease caused by the trematoda Schistosoma mansoni, the schistosomiasis mansoni. Although the adult parasites inhabit the blood vessels, probably the main element responsible for the pathology of the disease are the eggs, whose deposition in the liver results in formation of granulomas and hypersensitivity mediated by CD4 T cells. In the course of infection, the profile of T helper 1 (Th1) and Th2 cytokines released by immune cells is correlated with the extent of inflammation in the granuloma and with the disease severity...
July 25, 2017: Life Sciences
https://www.readbyqxmd.com/read/28737154/effect-of-dose-and-frequency-of-exposure-to-infectious-stages-on-trematode-infection-intensity-and-success-in-mussels
#5
Caroline Liddell, Jennifer E Welsh, Jaap van der Meer, David W Thieltges
Marine parasites such as trematodes often compromise the fitness of their hosts. Such effects are generally considered to be density-dependent, i.e. the greater the infection intensity in the host, the greater the detrimental impact on host fitness. However, the mechanisms determining infection in marine hosts are still poorly understood. Here, we investigated the effect of cercarial dose and exposure frequency (single vs. trickle infections) of a marine trematode parasite, Himasthla elongata (Trematoda: Echinostomatidae), on infection intensity and success in its second intermediate host, the blue mussel Mytilus edulis, an abundant and widely distributed bivalve in European coastal waters...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28715423/antibody-trapping-a-novel-mechanism-of-parasite-immune-evasion-by-the-trematode-echinostoma-caproni
#6
Alba Cortés, Javier Sotillo, Carla Muñoz-Antolí, Javier Molina-Durán, J Guillermo Esteban, Rafael Toledo
BACKGROUND: Helminth infections are among the most prevalent neglected tropical diseases, causing an enormous impact in global health and the socioeconomic growth of developing countries. In this context, the study of helminth biology, with emphasis on host-parasite interactions, appears as a promising approach for developing new tools to prevent and control these infections. METHODS/PRINCIPAL FINDINGS: The role that antibody responses have on helminth infections is still not well understood...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28664841/is-galba-schirazensis-mollusca-gastropoda-an-intermediate-host-of-fasciola-hepatica-trematoda-digenea-in-ecuador
#7
Yannick Caron, Maritza Celi-Erazo, Sylvie Hurtrez-Boussès, Mannon Lounnas, Jean-Pierre Pointier, Claude Saegerman, Bertrand Losson, Washington Benítez-Ortíz
Fasciolosis is a widely distributed disease in livestock in South America but knowledge about the epidemiology and the intermediate hosts is relatively scarce in Ecuador. For three months, lymnaeid snails were sampled (n = 1482) in Pichincha Province at two sites located in a highly endemic area. Snails were identified (based on morphology and ITS-2 sequences) and the infection status was established through microscopic dissection and a multiplex polymerase chain reaction (PCR)-based technique. Techniques based on morphology were not useful to accurately name the collected snail species...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28617666/parasitic-diseases-of-camels-in-iran-1931-2017-a-literature-review
#8
Alireza Sazmand, Anja Joachim
Parasitic diseases of camels are major causes of impaired milk and meat production, decreases in performance or even death. Some camel parasites also represent a threat to human health. About 171,500 one-humped camels (Camelus dromedarius) and 100-300 two-humped camels (Camelus bactrianus) live in Iran. Knowledge of the biodiversity of their parasites is still limited. The present review covers all information about camel parasitic diseases in Iran published as dissertations and in both Iranian and international journals from 1931 to February 2017...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28615867/first-record-of-a-rare-transversotrematid-cercaria-larva-trematoda-digenea-from-rajasthan-india-focus-on-seasonal-occurrence-and-host-specificity-of-diverse-cercariae
#9
Shanti Lal Choubisa, Vishva Jeet Jaroli, Zulfiya Sheikh
During the survey of freshwater snail hosts and their digenean larval trematode parasites, a rare cercaria larva belonging to family Transversotrematidae and subclass Digenea (Trematoda) was recovered from the snail species Melanoides striatella tuberculata inhabiting perennial Som river of Udaipur district, Rajasthan, India. More than 28 % mature specimens of these snails were found to be infected with transversotrematid cercaria larvae in the spring season. Body of this cercaria is large, bowl-shaped, biocellate, spinose, transparent and laterally extended having two pigmented eye spots, two hold fast organs extended from the junction of body and tail, large tail with two foliated furcal rami, and cyclocoel intestinal caeca...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28610248/a-reevaluation-of-the-specimens-of-i-mesocoelium-i-trematoda-mesocoeliidae-in-the-colecci%C3%A3-n-nacional-de-helmintos-mexico
#10
Ashley Samara López-García, Luis García-Prieto
Species of Mesocoelium Odhner, 1901 (Digenea) are generally similar and are often difficult to distinguish. Currently there are 42 specimens of this genus held in the Colección Nacional de Helmintos (CNHE) of the Instituto de Biología, Universidad Nacional Autónoma de Mexico, which previously have been assigned to three species: M. monas Rudolphi, 1819, M. travassosi Pereira & Cuocolo, 1940 and M. leiperi Bhalerao, 1936. Upon reevaluation of these specimens it was determined that 27, could not be assigned to species level and 15 could only be assigned to body type (carli and leiperi) because of the poor conditions of preservation of the material...
June 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28604263/redescription-of-austrodiplostomum-compactum-trematoda-diplostomidae-from-its-type-host-and-locality-in-venezuela-and-of-a-mordax-from-argentina
#11
Margarita Ostrowski de Núñez
Austrodiplostomum compactum from Nannopterum brasilianus, and its metacercaria from Geophagus sp. and Oreochromis mossambicus captured (1979) at its type locality Valencia Lake, Venezuela, by the author, is redescribed. The adult is characterized by its large body size, and an oral sucker smaller than the pharynx. The metacercaria has a similar body size as the adult, and the small genital primordia occupy 4.1-7.3% of body length. Experimental infections in chickens with metacercariae of Diplostomulum mordax from brains of Odonthestes bonariensis, captured (2015) at Dique Paso de las Piedras, near Bahia Blanca City, Buenos Aires Province, resulted in 10 adults 5 days post exposure...
June 10, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28592337/phylogenetic-relationships-among-european-and-asian-representatives-of-the-genus-aspidogaster-baer-1827-trematoda-aspidogastrea-inferred-from-molecular-data
#12
D M Atopkin, M B Shedko, S G Sokolov, A E Zhokhov
In the present study, phylogenetic relationships of European and Far Eastern representatives of the genus Aspidogaster Baer, 1827 were analysed: A. conchicola Baer, 1827, A. limacoides Diesing, 1834, A. ijimai Kawamura, 1915 and A. chongqingensis Wei, Huang & Dai, 2001. Based on ITS1-5.8S-ITS2 rDNA sequence data, an obvious differentiation was seen between specimens of A. limacoides s ensu stricto from the European part of Russia and A. limacoides sensu Chen et al., 2010 from China (13.7%); the latter parasites were recognized as A...
June 8, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28587614/host-specificity-molecular-phylogeny-and-morphological-differences-of-phyllodistomum-pseudofolium-nybelin-1926-and-phyllodistomum-angulatum-linstow-1907-trematoda-gorgoderidae-with-notes-on-eurasian-ruffe-as-final-host-for-phyllodistomum-spp
#13
Virmantas Stunžėnas, Romualda Petkevičiūtė, Larisa G Poddubnaya, Gražina Stanevičiūtė, Alexander E Zhokhov
BACKGROUND: Host-specificity patterns are not well-defined for trematodes of the genus Phyllodistomum Braun, 1899. The Eurasian ruffe, Gymnocephalus cernuus L., has been recorded as a definitive host for Phyllodistomum folium (Olfers, 1816), P. angulatum Linstow, 1907 and P. megalorchis Nybelin, 1926 and as the type-host for P. pseudofolium Nybelin (1926). A wide range of other host fishes have been recorded for these species as well. All present host records have been based on light microscopy and the life-cycles of P...
June 6, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28537229/-genomics-and-transcriptomics-of-the-chinese-liver-fluke-clonorchis-sinensis-opisthorchiidae-trematoda
#14
G N Chelomina
The review summarizes the results of first genomic and transcriptomic investigations of the liver fluke Clonorchis sinensis (Opisthorchiidae, Trematoda). The studies mark the dawn of the genomic era for opisthorchiids, which cause severe hepatobiliary diseases in humans and animals. Their results aided in understanding the molecular mechanisms of adaptation to parasitism, parasite survival in mammalian biliary tracts, and genome dynamics in the individual development and the development of parasite-host relationships...
March 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28502263/infection-specificity-and-host-manipulation-of-australapatemon-sp-trematoda-strigeidae-in-two-sympatric-species-of-leeches-hirudinea
#15
Anssi Karvonen, Anna Faltýnková, Jocelyn Mah Choo, E Tellervo Valtonen
Factors that drive parasite specificity and differences in infection dynamics among alternative host species are important for ecology and evolution of host-parasite interactions, but still often poorly known in natural systems. Here, we investigated spatiotemporal dynamics of infection, host susceptibility and parasite-induced changes in host phenotype in a rarely explored host-parasite system, the Australapatemon sp. trematode infecting two sympatric species of freshwater leeches, Erpobdella octoculata and Helobdella stagnalis...
May 15, 2017: Parasitology
https://www.readbyqxmd.com/read/28407790/ultrastructure-and-localization-of-neorickettsia-in-adult-digenean-trematodes-provides-novel-insights-into-helminth-endobacteria-interaction
#16
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
#17
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
#18
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
#19
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
#20
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
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