keyword
MENU ▼
Read by QxMD icon Read
search

cestodes

keyword
https://www.readbyqxmd.com/read/29448016/intestinal-immunity-suppresses-carrying-capacity-of-rats-for-the-model-tapeworm-hymenolepis-diminuta
#1
Tamio Ohno, Takuya Kai, Yuki Miyasaka, Haruhiko Maruyama, Akira Ishih, Hideto Kino
Hymenolepis diminuta is a parasitic tapeworm of the rat small intestine and is recognized as a useful model for the analysis of cestode-host interactions. In this study, we analyzed factors affecting the biomass of the tapeworm through use of rat strains carrying genetic mutations, namely X-linked severe combined immunodeficiency (xscid; T, B and NK cells deficiency), nude (rnu; T cell deficiency), and mast cell deficient rats. The worm biomass of F344-xscid rats after infection with 5 cysticercoids was much larger than control F344 rats from 3 to 8 weeks...
February 12, 2018: Parasitology International
https://www.readbyqxmd.com/read/29444843/testing-the-parasite-mass-burden-effect-on-host-behaviour-alteration-in-the-schistocephalus-stickleback-system
#2
Lucie Grécias, Julie Valentin, Nadia Aubin-Horth
Many parasites with complex life cycles modify their intermediate host's behaviour, which has been proposed to increase transmission to their definitive host. This behavioural change could result from the parasite actively manipulating its host, but could also be explained by a mechanical effect, where the parasite's physical presence affects host behaviour. We created an artificial internal parasite using silicone injections in the body cavity to test this mechanical effect hypothesis. We used the Schistocephalus solidus - threespine stickleback ( Gasterosteus aculeatus ) system, as this cestode can reach up to 92% of its fish host mass...
February 14, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29441842/crowding-in-the-first-intermediate-host-does-not-affect-infection-probability-in-the-second-host-in-two-helminths
#3
D P Benesh
When many worms co-infect the same host, their average size is often reduced. This negative density-dependent growth is called the crowding effect. Crowding has been reported many times for worms in their intermediate hosts, but rarely have the fitness consequences of crowding been examined. This study tested whether larval crowding reduces establishment success in the next host for two parasites with complex life cycles, the nematode Camallanus lacustris and the cestode Schistocephalus solidus. Infected copepods, the first host, were fed to sticklebacks, the second host...
February 14, 2018: Journal of Helminthology
https://www.readbyqxmd.com/read/29434034/influence-of-alternative-husbandry-systems-on-postmortem-findings-and-prevalence-of-important-bacteria-and-parasites-in-layers-monitored-from-end-of-rearing-until-slaughter
#4
Angelika Zloch, Sabrina Kuchling, Michael Hess, Claudia Hess
In the present study 66 layer flocks housed in different alternative husbandry systems were monitored from placement of birds on the farm until slaughter to evaluate a possible influence on the occurrence of selected non-infectious as well as infectious diseases. Postmortems were performed and the occurrence of extraintestinal Escherichia coli and Gallibacterium anatis was investigated. No specific postmortem findings were seen in pullets. Non-infectious diseases were mainly found in layers. Most prominent postmortem findings in layers were reproductive tract lesions and the presence of intestinal helminths...
February 6, 2018: Veterinary Record
https://www.readbyqxmd.com/read/29426469/implications-of-zoonotic-and-vector-borne-parasites-to-free-roaming-cats-in-central-spain
#5
A Montoya, M García, R Gálvez, R Checa, V Marino, J Sarquis, J P Barrera, C Rupérez, L Caballero, C Chicharro, I Cruz, G Miró
Cats are definitive hosts and reservoirs for several parasites, some of which are responsible for serious zoonotic diseases. We conducted a case-control study of data from a trap-neuter-return (TNR) programme (years 2014-2017) designed to examine the prevalence of zoonotic parasites in free-roaming cats living in urban areas of central Spain. In the animal population tested (n = 263), we detected a 29.2% prevalence of endoparasites, including high rates of cestodes (12.9%) and Toxocara cati (11.7%). While faecal samples showed no Toxoplasma gondii oocysts, the seroprevalence of T...
February 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29425245/unique-pharmacological-properties-of-serotonergic-g-protein-coupled-receptors-from-cestodes
#6
Federico Camicia, Ana M Celentano, Malcolm E Johns, John D Chan, Lucas Maldonado, Hugo Vaca, Nicolás Di Siervi, Laura Kamentezky, Ana M Gamo, Silvia Ortega-Gutierrez, Mar Martin-Fontecha, Carlos Davio, Jonathan S Marchant, Mara C Rosenzvit
BACKGROUND: Cestodes are a diverse group of parasites, some of them being agents of neglected diseases. In cestodes, little is known about the functional properties of G protein coupled receptors (GPCRs) which have proved to be highly druggable targets in other organisms. Notably, serotonergic G-protein coupled receptors (5-HT GPCRs) play major roles in key functions like movement, development and reproduction in parasites. METHODOLOGY/PRINCIPAL FINDINGS: Three 5-HT GPCRs from Echinococcus granulosus and Mesocestoides corti were cloned, sequenced, bioinformatically analyzed and functionally characterized...
February 9, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29424659/schistosomes-and-microfilarial-parasites-in-magellanic-penguins
#7
Ralph Vanstreels, Chris H Gardiner, Michael J Yabsley, Liandrie Swanepoel, Cristiane K M Kolesnikovas, Rodolfo P Silva-Filho, Ana C Ewbank, José L Catão-Dias
The Magellanic Penguin (Spheniscus magellanicus) is native to Argentina, Chile and the Falkland/Malvinas islands and is a regular winter migrant in Uruguayan and Brazilian coastal waters. The species is known to be susceptible to a variety of gastrointestinal nematodes, cestodes, trematodes and acanthocephalans, as well as renal trematodes and pulmonary nematodes. Schistosomes (Platyhelminthes, Trematoda, Schistosomatidae) and microfilariae (Nematoda, Secernentea, Onchocercidae) were histologically identified in Magellanic Penguins (Spheniscus magellanicus) that died while under care at rehabilitation centers in southern Brazil...
February 9, 2018: Journal of Parasitology
https://www.readbyqxmd.com/read/29409549/sclerocollum-saudii-al-jahdali-2010-acanthocephala-cavisomidae-as-a-sentinel-for-heavy-metal-pollution-in-the-red-sea
#8
R M El-S Hassanine, Z M Al-Hasawi, M S Hariri, H El-S Touliabah
Currently, fish helminth parasites, especially cestodes and acanthocephalans, are regarded as sentinel organisms to elucidate metal pollution in aquatic ecosystems. Here, 34 specimens of the fish Siganus rivulatus were collected in the Red Sea, from a seriously polluted, small lagoon named Sharm-Elmaya Bay, at Sharm El-Sheikh, South Sinai, Egypt; 22 (64.7%) were infected by Sclerocollum saudii (Acanthocephala: Cavisomidae). Thus, 22 natural infrapopulations (26-245 individuals) of this parasite were collected from infected fish...
February 7, 2018: Journal of Helminthology
https://www.readbyqxmd.com/read/29397438/parasites-of-skipjack-katsuwonus-pelamis-from-madeira-eastern-atlantic
#9
Margarida Hermida, Bárbara Cavaleiro, Lídia Gouveia, Aurélia Saraiva
Skipjack tuna, Katsuwonus pelamis, is a tropical species of economic importance for fisheries around the world. It occurs seasonally in subtropical waters around Madeira archipelago, in the warmer months. In this study, a parasitological analysis was carried out on a sample of 30 skipjack caught near Madeira Island. A total of 24 parasite taxa were found in this sample. The skipjack parasite community detected was characterized by a wide diversity of parasites, with a predominance of adult didymozoid trematodes, and high prevalences of Tentacularia coryphaenae cestode larvae and Anisakis sp...
February 3, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29395101/from-individual-heterogeneity-to-population-level-overdispersion-quantifying-the-relative-roles-of-host-exposure-and-parasite-establishment-in-driving-aggregated-helminth-distributions
#10
Elizabeth M Warburton, Maarten J Vonhof
In most host-parasite systems, variation in parasite burden among hosts drives transmission dynamics. Heavily infected individuals introduce disproportionate numbers of infective stages into host populations or surrounding environments, causing sharp increases in frequency of infection. Parasite aggregation within host populations may result from variation among hosts in exposure to infective propagules and probability of subsequent establishment of parasites in the host. This is because individual host heterogeneities contribute to a pattern of parasite overdispersion that emerges at the population level...
January 26, 2018: International Journal for Parasitology
https://www.readbyqxmd.com/read/29390318/hymenolepis-nana-a-case-report-of-a-perfect-ibd-camouflage-warrior
#11
Juergen Hench, Gieri Cathomas, Matthias S Dettmer
RATIONALE: There is evidence that parasitic helminths can ameliorate colitis in animal models and humans. Although infections with Hymenolepis sp. are clinically benign, the immunomodulatory interactions between host and parasite are largely unknown. PATIENT CONCERNS: In this study we examined the intestinal mucosa of an adult asymptomatic patient harboring adult and larval dwarf tapeworms (Hymenolepis nana) who underwent surgery for an unrelated reason. INTERVENTIONS: Routine histology and immunohistochemistry were performed to characterize the host's response to the parasite...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29386083/molecular-data-confirm-the-taxonomic-position-of-hymenolepis-erinacei-cyclophyllidea-hymenolepididae-and-host-switching-with-notes-on-cestodes-of-palaearctic-hedgehogs-erinaceidae
#12
R Binkienė, A Miliūtė, V Stunžėnas
The cestode Hymenolepis erinacei is regarded as a widely distributed parasite in European hedgehogs of the genus Erinaceus, although the taxonomic position of this hymenolepidid has been debated for a considerable period of time. We present the first molecular data for this cestode, including partial DNA sequences of mitochondrial 16S and nuclear 28S ribosomal genes. Molecular phylogenetic analysis clusters H. erinacei in one clade together with representatives of the genus Hymenolepis from rodents. Characteristic morphological features, including the oval embryophore without filaments and shape of the embryonic hooks of H...
February 1, 2018: Journal of Helminthology
https://www.readbyqxmd.com/read/29382410/influence-of-ligula-intestinalis-plerocercoids-cestoda-diphyllobothriidea-on-the-occurrence-of-eyeflukes-in-roach-rutilus-rutilus-from-a-lake-in-south-east-england
#13
N J Morley, J W Lewis
Vertebrate hosts commonly harbour concurrent infections of different helminth species which may interact with each other in a synergistic, antagonistic or negligible manner. Direct interactions between helminths that share a common site in the host have been regularly reported, but indirect interactions between species that occur in different sites are rarely described, especially in fish hosts. Plerocercoids of Ligula intestinalis are common infections of the peritoneal (body) cavity of roach (Rutilus rutilus) in freshwater habitats...
January 31, 2018: Journal of Helminthology
https://www.readbyqxmd.com/read/29351082/prevalence-of-endoparasitic-infections-of-birds-in-zoo-gardens-in-serbia
#14
Tamara Ilić, Zsolt Becskei, Bojan Gajić, József Özvegy, Predrag Stepanović, Katarina Nenadović, Sanda Dimitrijević
This report represents the prevalence of endoparasitic infections of birds in zoological gardens in Serbia. Coprological examination conducted during 2015 and 2016, involved samples from 318 individual birds belonging to 112 species, in three zoo gardens (Belgrade, Palić and Bor). Individual faeces samples were analysed by the flotation method in salt solution. The presence of endoparasites was established in 51.96% (Belgrade), 46.16% (Palić) and 16.66% (Bor) of the tested birds. We diagnosed coccidian oocysts, eggs of Capillaria spp, Heterakis spp, Trichostrongylus spp, Ascaridia spp, Syngamus trachea and eggs of yet unidentified trematode...
March 26, 2018: Acta Parasitologica
https://www.readbyqxmd.com/read/29350180/genetic-characterization-of-three-mitochondrial-gene-sequences-of-goat-sheep-derived-coenurus-cerebralis-and-cysticercus-tenuicollis-isolates-in-inner-mongolia-china
#15
Yichi Zhang, Wei Zhao, Di Yang, Yuan Tian, Weizhe Zhang, Aiqin Liu
Taenia multiceps and Taenia hydatigena are widely distributed tapeworms of canids. Due to a lack of genetic information on these two parasites in China, in this study we analyzed six coenurus cerebralis and two cysticercus tenuicollis cysts from goats or sheep in Inner Mongolia, northern China by amplifying three mitochondrial genes (cox1, nad4, and cytb). Two haplotypes were obtained at each locus for either of the two Taenia cestode species, with ten nucleotide sequences being novel. The degrees of genetic variations were 1...
2018: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/29335790/echinococcus-multilocularis-cestoda-cyclophyllidea-taeniidae-origin-differentiation-and-functional-ultrastructure-of-the-oncospheral-tegument-and-hook-region-membrane
#16
Zdzisław Świderski, Jordi Miquel, Samira Azzouz-Maache, Anne-Françoise Pétavy
Both the oncospheral tegument and the hook region membrane (HRM) of Echinococcus multilocularis hexacanths originate from a syncytial binucleate complex that appears in the early stage of morphogenesis and organogenesis of the hexacanth larva. The primordium of this binucleate complex forms a binucleate syncytial cap or "calotte" situated beneath the inner envelope at one pole of the developing embryo. During oncospheral differentiation, the binucleate perikaryon of the syncytial cap is sunk progressively deeper into the central part of the embryo, but remains always connected with the distal cytoplasm by a tendrillar cytoplasmic connection or bridge...
January 15, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29334823/a-new-genus-of-tapeworm-cestoda-onchoproteocephalidea-from-sawfish-elasmobranchii-pristidae
#17
Janine N Caira, Kirsten Jensen, Carolyn A Fyler
Collections from the dwarf sawfish, Pristis clavata, near Darwin, Australia in 1997 led to the discovery of the new onchoproteocephalidean genus Matticestus n. gen.-a taxon that has been referred to in molecular phylogenetic analyses in which it has been included as "New genus 8." Its type species, Matticestus anneae n. gen., n. sp., and a second species, Matticestus kathleenae n. sp. are described. Placement of this taxon in the Onchoproteocephalidea is supported morphologically in that both species bear a scolex with 4 bothridia each with a pair of bipronged hooks and spinitriches that extend throughout the length of the body...
January 15, 2018: Journal of Parasitology
https://www.readbyqxmd.com/read/29317886/new-record-of-brachylaima-sp-digenea-brachylaimidae-from-a-stray-dog-in-north-iran
#18
Iraj Mobedi, Mahdi Fakhar, Malik Irshadullah, Bahman Rahimi-Esboei, Shirzad Gholami, Natalia Fraija-Fernández
Background: Stray dogs are considered potential reservoirs for zoonotic diseases. Previous helminthic surveys in Iran, have accounted for mainly species of nematodes and cestodes, and rarely digeneans. Methods: We accessed 42 car-crashed stray dogs from the Farah Abad Region in the Mazandaran Province (North Iran) between Oct 2012 and Dec 2013, to be inspected for parasites. Helminths were collected from the intestine and they were morphologically studied. Results: We found five adult digeneans from the family Brachylaimidae, identified as Brachylaima sp...
October 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/29317356/comparative-proteomics-of-the-larval-and-adult-stages-of-the-model-cestode-parasite-mesocestoides-corti
#19
Jeferson Camargo de Lima, Karina Mariante Monteiro, Tatiana Noel Basika Cabrera, Gabriela Prado Paludo, Hercules Moura, John R Barr, Arnaldo Zaha, Henrique Bunselmeyer Ferreira
Mesocestoides corti is a widely used model for the study of cestode biology, and its transition from the larval tetrathyridium (TT) stage to the strobilated, adult worm (ST) stage can be induced and followed in vitro. Here, a proteomic approach was used to describe and compare M. corti TT and ST protein repertories. Overall, 571 proteins were identified, 238 proteins in TT samples and 333 proteins in ST samples. Among the identified proteins, 207 proteins were shared by TTs and STs, while 157 were stage-specific, being 31 exclusive from TTs, and 126 from STs...
January 6, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29304756/medical-treatment-of-an%C3%A2-unusual-cerebral-hydatid-disease
#20
Shu Chen, Ning Li, Feifei Yang, Jiqin Wu, Yuekai Hu, Shenglei Yu, Qi Chen, Xuan Wang, Xinyu Wang, Yuanyuan Liu, Jianming Zheng
BACKGROUND: Hydatid disease is a worldwide zoonosis produced by the larval stage of cestodes of the Echinococcus genus. Hydatid disease primarily involves the liver and lungs. The brain is involved in less than 2% of cases. Surgery has long been the only choice for the treatment, but chemotherapy has been successfully replaced surgery in some special cases. CASE PRESENTATION: We report a rare hydatid disease case which presented with multiple lesions in right frontal lobe, an uncommon site, and in the liver and lungs...
January 5, 2018: BMC Infectious Diseases
keyword
keyword
40439
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"