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https://www.readbyqxmd.com/read/28289269/epidemiological-investigation-of-parasitic-infection-of-schoolchildren-from-six-elementary-schools-in-sakon-nakhon-province-thailand
#1
Ryuichi Doi, Makoto Itoh, Somchai Chakhatrakan, Shoji Uga
We conducted an epidemiological study of intestinal parasitic infection in 572 schoolchildren aged 4 to 12 years old from six elementary schools in Sakon Nakhon Province, Thailand from June 2013 to August 2014. We collected fecal, blood, and urine samples to investigate parasitic infection and conducted a questionnaire survey. Soil samples were examined for egg contamination. Fecal examination, using the formalin-ether sedimentation method, revealed that 39% of schoolchildren were infected with eight genera and eight species of parasites; three nematodes, two trematodes, one cestode, and two protozoa...
February 15, 2017: Kobe Journal of Medical Sciences
https://www.readbyqxmd.com/read/28288753/proteomic-analysis-of-taenia-ovis-metacestodes-by-high-performance-liquid-chromatography-coupled-tandem-mass-spectrometry
#2
Yadong Zheng
Taenia ovis metacestodes reside in the muscle of sheep and goats, and may cause great economic loss due to condemnation of carcasses if not effectively controlled. Although advances have been made in the control of T. ovis infection, our knowledge of T. ovis biology is limited. Herein the protein profiling of T. ovis metacestodes was determined by liquid chromatography-linked tandem mass spectrometry. A total of 966 proteins were identified and 25.1% (188/748) were annotated to be associated with metabolic pathways...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28281100/helminth-parasitism-in-two-closely-related-south-african-rodents-abundance-prevalence-species-richness-and-impinging-factors
#3
Andrea Spickett, Kerstin Junker, Boris R Krasnov, Voitto Haukisalmi, Sonja Matthee
We investigated patterns of helminth infection in two closely related rodents (social Rhabdomys pumilio occurring mainly in xeric habitats and solitary R. dilectus occurring mainly in mesic habitats) at 20 localities in different biomes of South Africa and asked if between-species differences were mainly caused by difference in sociality or difference in environmental conditions of their respective habitats. Helminths recovered from the gastrointestinal tract totalled 11 nematode and 5 cestode species from R...
March 10, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28274289/transmission-ecology-of-taeniid-larval-cestodes-in-rodents-in-sweden-a-low-endemic-area-for-echinococcus-multilocularis
#4
Andrea L Miller, Gert E Olsson, Sofia Sollenberg, Marion R Walburg, Moa Skarin, Johan Höglund
Although local prevalence of Echinococcus multilocularis may be high, this zoonotic parasite has an overall low prevalence in foxes and rodents in Sweden. To better understand opportunities for E. multilocularis transmission in the Swedish environment, the aim of this study was to investigate other taeniid cestodes and to relate observed patterns to E. multilocularis. Cestode parasites were examined in fox feces and rodents caught in different habitats from four regions of Sweden. Arvicola amphibius and Microtus agrestis were parasitized with Versteria mustelae, Hydatigera taeniaeformis s...
March 9, 2017: Parasitology
https://www.readbyqxmd.com/read/28270242/to-see-or-not-to-see-non-invasive-imaging-for-improved-readout-of-drug-treatment-trials-in-the-murine-model-of-secondary-alveolar-echinococcosis
#5
D Gorgas, N Marreros, R Rufener, A Hemphill, B Lundström-Stadelmann
Alveolar echinococcosis (AE) is an emerging zoonotic disease caused by the cestode Echinococcus multilocularis. The secondary infection model of AE is based on intraperitoneal injection of disease-causing metacestodes into the peritoneal cavity of mice, which allows investigations on novel drugs or immunotherapeutical treatment options in vivo. So far, such in vivo studies assessed exclusively the parasite weight at the endpoint of a given treatment period. We here developed an ultrasound (US)-based scoring system that allows to follow-up parasite development in the living animal, and provides insights into parasite growth during the treatment phase...
March 8, 2017: Parasitology
https://www.readbyqxmd.com/read/28260533/an-updated-look-at-the-uneven-distribution-of-cryptic-diversity-among-parasitic-helminths
#6
G Pérez-Ponce de León, R Poulin
Cryptic parasite diversity is a major issue for taxonomy and systematics, and for attempts to control diseases of humans, domestic animals and wildlife. Here, we re-examine an earlier report that, after correcting for sampling effort, more cryptic species of trematodes are found per published study than for other helminth taxa. We performed a meta-analysis of 110 studies that used DNA sequences to search for cryptic species in parasitic helminth taxa. After correcting for study effort and accounting for the biogeographical region of origins, we found that more cryptic species tend to be uncovered among trematodes, and fewer among cestodes and animal-parasitic nematodes, than in other helminth groups...
March 6, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28260532/the-role-of-chewing-lice-phthiraptera-philopteridae-as-intermediate-hosts-in-the-transmission-of-hymenolepis-microps-cestoda-cyclophyllidea-from-the-willow-ptarmigan-lagopus-lagopus-aves-tetraonidae
#7
D Pistone, M Lindgren, P Holmstad, N K Ellingsen, H Kongshaug, F Nilsen, A Skorping
The cestode Hymenolepis microps is an intestinal parasite of tetraonid birds, including the willow ptarmigan (Lagopus lagopus). This parasite is able to maintain a high prevalence and intensity throughout the year, even in a subarctic environment in bird populations with relatively low host densities, indicating effective transmission routes. Willow ptarmigan consume mainly vegetal material and active consumption of invertebrates is confined to the first two or three weeks of life. Ptarmigan are infected by different species of ectoparasites, of which two species of feather lice, Lagopoecus affinis and Goniodes lagopi, are the most abundant...
March 6, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28257950/redescription-and-molecular-characterization-of-anoplocephala-manubriata-railliet-et-al-1914-cestoda-anoplocephalidae-from-a-sri-lankan-wild-elephant-elephas-maximus
#8
K U E Perera, Susiji Wickramasinghe, B V P Perera, K B A T Bandara, R P V J Rajapakse
The present work provides a detailed morphological and molecular description of Anoplocephala manubriata in elephants. Adult worms were recovered during an autopsy of a wild elephant in Elephant Transit Home, Udawalawe, Sri Lanka. Necropsy findings revealed a severe cestode infection in the small intestine. These tapeworms were tightly attached to the intestinal mucosae, resulted in hyperemic thickened intestinal mucosae, variable size irregular well-demarcated multifocal ulcerative regions sometimes covered with necrotic membranes and variable size, diffuse, well-demarcated raised nodular masses were evident in the small intestine...
February 28, 2017: Parasitology International
https://www.readbyqxmd.com/read/28246374/a-new-genus-with-two-new-species-of-lecanicephalidean-tapeworms-cestoda-from-the-mangrove-whipray-urogymnus-granulatus-myliobatiformes-dasyatidae-from-the-solomon-islands-and-northern-australia
#9
Kaylee S Herzog, Kirsten Jensen
A new lecanicephalidean genus is erected for cestodes previously recognised as "New Genus 12" (Polypocephalidae) in a phylogenetic analysis of the interrelationship of members of this order. Examination of the cestode fauna of the mangrove whipray, Urogymnus granulatus (Macleay) (Myliobatiformes: Dasyatidae) from the Solomon Islands and northern Australia revealed the existence of specimens representing two new species, consistent in morphology with "New Genus 12." Corollapex gen. n. is unique among the 24 valid lecanicephalidean genera in its possession of an apical organ in the form of an external retractable central disk surrounded by eight concave muscular, membrane-bound pads and an internal heterogeneous glandular component...
February 6, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/28241794/the-echinococcus-canadensis-g7-genome-a-key-knowledge-of-parasitic-platyhelminth-human-diseases
#10
Lucas L Maldonado, Juliana Assis, Flávio M Gomes Araújo, Anna C M Salim, Natalia Macchiaroli, Marcela Cucher, Federico Camicia, Adolfo Fox, Mara Rosenzvit, Guilherme Oliveira, Laura Kamenetzky
BACKGROUND: The parasite Echinococcus canadensis (G7) (phylum Platyhelminthes, class Cestoda) is one of the causative agents of echinococcosis. Echinococcosis is a worldwide chronic zoonosis affecting humans as well as domestic and wild mammals, which has been reported as a prioritized neglected disease by the World Health Organisation. No genomic data, comparative genomic analyses or efficient therapeutic and diagnostic tools are available for this severe disease. The information presented in this study will help to understand the peculiar biological characters and to design species-specific control tools...
February 27, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28236521/designing-a-minimal-intervention-strategy-to-control-taenia-solium
#11
REVIEW
Marshall W Lightowlers, Meritxell Donadeu
Neurocysticercosis is an important cause of epilepsy in many developing countries. The disease is a zoonosis caused by the cestode parasite Taenia solium. Many potential intervention strategies are available, however none has been able to be implemented and sustained. Here we predict the impact of some T. solium interventions that could be applied to prevent transmission through pigs, the parasite's natural animal intermediate host. These include minimal intervention strategies that are predicted to be effective and likely to be feasible...
February 21, 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/28220284/untangling-convoluted-taxonomy-of-chambriella-rego-chubb-pavanelli-1999-cestoda-proteocephalidae-with-erection-of-riggenbachiella-n-g-and-the-description-of-a-new-species-from-pimelodid-catfishes-in-the-neotropical-region
#12
Philippe Vieira Alves, Alain de Chambrier, José Luis Luque, Tomáš Scholz
As part of a complex revision of proteocephalid cestodes parasitic in freshwater bony fishes of the Neotropical Region, the genus Chambriella Rego, Chubb & Pavanelli, 1999 is redefined based on detailed examination of type-specimens and newly collected material of both nominal species of the genus. This examination revealed that the type-species C. agostinhoi (Pavanelli & Santos, 1992) from Zungaro jahu (Ihering) (type-host) and Z. zungaro (Humboldt) is indistinguishable from Lenhataenia megacephala (Woodland, 1934) from Sorubimichthys planiceps (Spix & Agassiz) (all hosts Siluriformes: Pimelodidae), the type- and only species of the genus...
March 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/28213655/molecular-characterization-of-the-unique-mesostephanus-appendiculatus-trematoda-cyathocotylidae-by-small-ribosomal-rna-from-egypt
#13
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/28212669/understanding-trophic-interactions-in-host-parasite-associations-using-stable-isotopes-of-carbon-and-nitrogen
#14
Milen Nachev, Maik A Jochmann, Friederike Walter, J Benjamin Wolbert, S Marcel Schulte, Torsten C Schmidt, Bernd Sures
BACKGROUND: Stable isotope analysis of carbon and nitrogen can deliver insights into trophic interactions between organisms. While many studies on free-living organisms are available, the number of those focusing on trophic interactions between hosts and their associated parasites still remains scarce. In some cases information about taxa (e.g. acanthocephalans) is completely missing. Additionally, available data revealed different and occasionally contrasting patterns, depending on the parasite's taxonomic position and its degree of development, which is most probably determined by its feeding strategy (absorption of nutrients through the tegument versus active feeding) and its localization in the host...
February 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28192542/functional-diversity-of-secreted-cestode-kunitz-proteins-inhibition-of-serine-peptidases-and-blockade-of-cation-channels
#15
Martín Fló, Mariana Margenat, Leonardo Pellizza, Martín Graña, Rosario Durán, Adriana Báez, Emilio Salceda, Enrique Soto, Beatriz Alvarez, Cecilia Fernández
We previously reported a multigene family of monodomain Kunitz proteins from Echinococcus granulosus (EgKU-1-EgKU-8), and provided evidence that some EgKUs are secreted by larval worms to the host interface. In addition, functional studies and homology modeling suggested that, similar to monodomain Kunitz families present in animal venoms, the E. granulosus family could include peptidase inhibitors as well as channel blockers. Using enzyme kinetics and whole-cell patch-clamp, we now demonstrate that the EgKUs are indeed functionally diverse...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28183584/monitoring-of-the-intraoperative-analgesia-by-pupillometry-during-laparoscopic-splenectomy-for-splenic-hydatid-cyst
#16
Ana Abad-Torrent, Albert Sueiras-Gil, Miquel Martínez-Vilalta, Josep Vallet-Fernández, María Guisasola-Rabés
Echinococcosis causes a hydatid cyst, a worldwide disease. Human beings are intermediate hosts, but dogs complete the life cycle of the cestode. The most common presentation sites are the liver and lungs. We present an unusual case of a primary splenic hydatid cyst. Open splenectomy has traditionally been the treatment of choice for splenic hydatid cysts. In recent years, minimally invasive laparoscopic surgery has been used in appropriate cases. A healthy 48-year-old woman was scheduled for laparoscopic splenectomy...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28177292/intestinal-helminth-fauna-of-the-shortfin-mako-isurus-oxyrinchus-elasmobranchii-lamnidae-in-the-northeast-atlantic-ocean
#17
Jaime Penadés-Suay, Jesús Tomás, Manuel Merchán, Francisco Javier Aznar
Large oceanic sharks represent a suitable model to investigate the influence of a host's oceanic conditions on the structure of its helminth communities. In this study, we describe the intestinal helminth fauna, and investigate determinants of infracommunity structure, in 39 specimens of shortfin mako Isurus oxyrinchus collected in the NE Atlantic. Six cestode species were found in the spiral valve of makos: 3 are typical from lamnid sharks, namely, gravid specimens of Clistobothrium montaukensis, Gymnorhynchus isuri and Ceratobothrium xanthocephalum, and 3 are immature specimens of cestode species common to several elasmobranchs, namely, Dinobothrium septaria, Nybelinia lingualis, and Phyllobothrium cf...
February 8, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28139530/neurocysticercosis-diagnostic-problems-current-therapeutic-strategies
#18
REVIEW
Vedantam Rajshekhar
Neurocysticercosis (NCC) is the most common single cause of seizures/epilepsy in India and several other endemic countries throughout the world. It is also the most common parasitic disease of the brain caused by the cestode Taenia solium or pork tapeworm. The diagnosis of NCC and the tapeworm carrier (taeniasis) can be relatively inaccessible and expensive for most of the patients. In spite of the introduction of several new immunological tests, neuroimaging remains the main diagnostic test for NCC. The treatment of NCC is also mired in controversy although, there is emerging evidence that albendazole (a cysticidal drug) may be beneficial for patients by reducing the number of seizures and hastening the resolution of live cysts...
September 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28130828/the-effect-of-echinococcus-granulosus-on-spleen-cells-and-tgf-%C3%AE-expression-in-the-peripheral-blood-of-balb-c-mice
#19
REVIEW
Shuanghong Yin, Xiaolin Chen, Junbo Zhang, Fangjie Xu, Hairui Fang, Jun Hou, Xuyong Zhang, Xiangwei Wu, Xueling Chen
Cystic echinococcosis (CE) caused by the cestode Echinococcus granulosus (E. granulosus) is a zoonotic parasitic disease. The effective immune evasion mechanisms of E. granulosus allow it to parasitise its hosts. However, the status of the innate and adaptive immune cells and their contributions to E. granulosus progression remain poorly understood. In this study, We aimed to determine the impact of E. granulosus infection on T cells, NK cell responses and TGF-β expression during the early infection phase in BALB/c mice...
January 28, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28128348/population-expansion-and-individual-age-affect-endoparasite-richness-and-diversity-in-a-recolonising-large-carnivore-population
#20
Ines Lesniak, Ilja Heckmann, Emanuel Heitlinger, Claudia A Szentiks, Carsten Nowak, Verena Harms, Anne Jarausch, Ilka Reinhardt, Gesa Kluth, Heribert Hofer, Oliver Krone
The recent recolonisation of the Central European lowland (CEL) by the grey wolf (Canis lupus) provides an excellent opportunity to study the effect of founder events on endoparasite diversity. Which role do prey and predator populations play in the re-establishment of endoparasite life cycles? Which intrinsic and extrinsic factors control individual endoparasite diversity in an expanding host population? In 53 individually known CEL wolves sampled in Germany, we revealed a community of four cestode, eight nematode, one trematode and 12 potential Sarcocystis species through molecular genetic techniques...
January 27, 2017: Scientific Reports
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