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Diphyllobothrium

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https://www.readbyqxmd.com/read/28877575/molecular-identification-of-diphyllobothrium-latum-from-a-pediatric-case-in-taiwan
#1
Yu-Chin An, Chia-Cheng Sung, Chih-Chien Wang, Hsin-Chung Lin, Kuang-Yao Chen, Fu-Man Ku, Ruei-Min Chen, Mei-Li Chen, Kuo-Yang Huang
Human diphyllobothriasis is a parasitic disease caused by ingestion of larvae (plerocercoids) in raw or undercooked fish and commonly found in temperate areas. Rare cases were reported in tropical or subtropical areas especially in children. The first documented case of pediatric diphyllobothriasis in Taiwan had been reported 11 years ago. Here, we report another 8-year-old girl case who presented with a live noodle-like worm hanging down from her anus, with no other detectable symptoms. We pulled the worm out and found the strobila being 260 cm in length...
August 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28780153/the-catholic-taste-of-broad-tapeworms-multiple-routes-to-human-infection
#2
Andrea Waeschenbach, Jan Brabec, Tomáš Scholz, D Timothy J Littlewood, Roman Kuchta
Broad tapeworms (Cestoda: Diphyllobothriidea) are the principal agents of widespread food-borne cestodosis. Diphyllobothriosis and diplogonoporosis, caused by members of the genera Diphyllobothrium, Diplogonoporus and Adenocephalus, are the most common fish cestodoses with an estimated 20million people infected worldwide, and has seen recent (re)emergences in Europe due to the increasing popularity of eating raw or undercooked fish. Sparganosis is a debilitating and potentially lethal disease caused by the larvae of the genus Spirometra, which occurs throughout much of the (sub)tropics and is caused by the consumption of raw snakes and frogs, and drinking water contaminated by infected copepods...
August 3, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28758219/plerocercoids-of-the-cestode-diphyllobothrium-ditremum-in-brown-trout-salmo-trutta-substantial-increase-in-infection-after-establishment-of-european-minnow-phoxinus-phoxinus
#3
R Borgstrøm, J Trømborg, T O Haugen, B O Rosseland
This study focuses on plerocercoids of the cestode Diphyllobothrium ditremum in brown trout Salmo trutta from the subalpine lake Øvre Heimdalsvatn in south-central Norway. Salmo trutta was the only fish species in this lake until European minnow Phoxinus phoxinus was registered in 1969. The P. phoxinus population increased substantially in the following years. In contrast with the 1969-1972 period, when plerocercoids of D. ditremum were practically absent in S. trutta, there was a high prevalence and intensity of infection in the 2013 S...
July 30, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28719957/four-human-cases-of-diphyllobothrium-nihonkaiense-eucestoda-diphyllobothriidae-in-china-with-a-brief-review-of-chinese-cases
#4
Yu-Chun Cai, Shao-Hong Chen, Hiroshi Yamasaki, Jia-Xu Chen, Yan Lu, Yong-Nian Zhang, Hao Li, Lin Ai, Hai-Ning Chen
We described 4 human infection cases of zoonotic fish-tapeworm, Diphyllobothrium nihonkaiense, identified with morphological and molecular characters and briefly reviewed Chinese cases in consideration of it as an emerging parasitic disease in China. The scolex and mature and gravid proglottids of some cases were seen, a rosette-shaped uterus was observed in the middle of the mature and gravid proglottids, and the diphyllobothriid eggs were yellowish-brown in color and displayed a small knob or abopercular protuberance on the opposite end of a lid-like opening...
June 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28647499/complete-sequence-and-characterization-of-the-mitochondrial-genome-of-diphyllobothrium-stemmacephalum-the-type-species-of-genus-diphyllobothrium-cestoda-diphyllobothriidae-using-next-generation-sequencing
#5
Hiroshi Yamasaki, Shinji Izumiyama, Tomoyoshi Nozaki
We first constructed and characterized the complete mitochondrial genome (mitogenome) sequence of Diphyllobothrium stemmacephalum, the type species of genus Diphyllobothrium, using next generation sequencing (NGS). The mitogenome of D. stemmacephalum was 13,716bp, including 12 protein-coding genes, 22 tRNA genes, 2 rRNA genes and 2 longer intergenic non-coding regions, and has features common to mitogenomes of other cestodes. Although it has been accepted that tRNA for serine (trnS2(UCN)) in Platyhelminthes lacks a D arm, the trnS2(UCN) of D...
June 22, 2017: Parasitology International
https://www.readbyqxmd.com/read/28606444/comparative-mitochondrial-genomics-among-spirometra-cestoda-diphyllobothriidae-and-the-molecular-phylogeny-of-related-tapeworms
#6
Xi Zhang, Jiang Yang Duan, Ya Li Shi, Peng Jiang, De Jun Zeng, Zhong Quan Wang, Jing Cui
The larva of Spirometra erinaceieuropaei can parasitize humans, causing a serious parasitic zoonosis known as sparganosis. Although it is medically important, our knowledge about the phylogenetic position of S. erinaceieuropaei and its evolutionary history is fragmentary. In this study, complete mitochondrial (mt) genomes of 4 geographically distinct isolates of S. erinaceieuropaei spargana collected from 4 frog hosts (Hylarana guentheri, Rana nigromaculata, R. rugulosa, R. temporaria) were characterized using an Illumina sequencing platform...
June 9, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28599671/is-there-a-difference-in-prevalence-of-helminths-between-households-using-ecological-sanitation-and-those-using-traditional-pit-latrines-a-latrine-based-cross-sectional-comparative-study-in-malawi
#7
Save Kumwenda, Chisomo Msefula, Wilfred Kadewa, Yohane Diness, Charles Kato, Tracy Morse, Bagrey Ngwira
BACKGROUND: Studies have shown that households using sludge from human excreta for agriculture are at an increased risk of soil transmitted helminths. However, while use of ecological sanitation (EcoSan) latrines is increasing in most African countries including Malawi, few studies have been done to check whether use of such sludge could potentially increase the prevalence of helminthic infections among household members as a results of exposure to faecal sludge/compared to use of traditional latrines...
June 9, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28484854/helminths-of-brown-bears-ursus-arctos-in-the-kola-peninsula
#8
S V Bugmyrin, K F Tirronen, D V Panchenko, A Kopatz, S B Hagen, H G Eiken, A S Kuznetsova
We present data on the species composition of helminths in brown bears (Ursus arctos) from the Murmansk Region, Russia. The absence of any information about helminths of brown bear in the region necessitated the conduct of these studies. Samples were collected in 2014 and 2015 in the southern part of the Kola Peninsula from the White Sea coastal habitats. Annually, in the study area, 1-3 bears are legally hunted and biological samples for examination are very difficult to obtain. Therefore, we used fecal samples...
May 8, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28445773/taxonomic-comments-on-diphyllobothrium-hottai-yazaki-fukumoto-abe-1988-cestoda-diphyllobothriidae
#9
EDITORIAL
Minoru Nakao, Tetsuya Yanagida
No abstract text is available yet for this article.
April 23, 2017: Parasitology International
https://www.readbyqxmd.com/read/28410387/mathematical-algorithm-for-the-automatic-recognition-of-intestinal-parasites
#10
Alicia Alva, Carla Cangalaya, Miguel Quiliano, Casey Krebs, Robert H Gilman, Patricia Sheen, Mirko Zimic
Parasitic infections are generally diagnosed by professionals trained to recognize the morphological characteristics of the eggs in microscopic images of fecal smears. However, this laboratory diagnosis requires medical specialists which are lacking in many of the areas where these infections are most prevalent. In response to this public health issue, we developed a software based on pattern recognition analysis from microscopi digital images of fecal smears, capable of automatically recognizing and diagnosing common human intestinal parasites...
2017: PloS One
https://www.readbyqxmd.com/read/28185895/using-the-small-subunit-of-nuclear-ribosomal-dna-to-reveal-the-phylogenetic-position-of-the-plerocercoid-larvae-of-spirometra-tapeworms
#11
Xi Zhang, Jiang Yang Duan, Zhong Quan Wang, Peng Jiang, Ruo Dan Liu, Jing Cui
Although medically important, the systematics of Spirometra and the taxonomic position of S. erinaceieuropaei remain unclear. In this study, the 18S rDNA gene of S. erinaceieuropaei sparganum from naturally infected frogs caught in 14 geographical locations of China was sequenced. In addition, all available 18S sequences of the family Diphyllobothriidae in the Genbank database were included to reconstruct the phylogeny of diphyllobothriid tapeworms. The secondary structure model of the 18S rDNA was also predicated to further explore the sequence variation...
April 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28137629/prostaglandins-e2-and-d2-regulators-of-host-immunity-in-the-model-parasite-diphyllobothrium-dendriticum-an-immunocytochemical-and-biochemical-study
#12
Ivan A Kutyrev, Natalia M Biserova, Daniil N Olennikov, Janetta V Korneva, Olga E Mazur
The spectrum of immunomodulating molecules produced by tapeworms is not yet well understood. The aims of this study, on the tapeworm Diphyllobothrium dendriticum, were: 1) detection and quantification of prostaglandins (PGs) E2 and D2 by high performance liquid chromatography; 2) visualization of PGE2 and PGD2 in specific cells, using methods of immunocytochemistry and confocal laser scanning microscopy; and 3) investigation of the ultrastructure of the cells potentially producing PGE2 and PGD2. The PGE2 immunoreaction (IR) was found in the apical terminals of the frontal glands and sensory organs in the tegument and in small neurons belonging to the main cords and commissures...
January 27, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28098540/diphyllobothrium-nihonkaiense-tapeworm-larvae-in-salmon-from-north-america
#13
Roman Kuchta, Mikuláš Oros, Jayde Ferguson, Tomáš Scholz
Diphyllobothriosis is reemerging because of global importation and increased popularity of eating raw fish. We detected Diphyllobothrium nihonkaiense plerocercoids in the musculature of wild pink salmon (Oncorhynchus gorbuscha) from Alaska, USA. Therefore, salmon from the American and Asian Pacific coasts and elsewhere pose potential dangers for persons who eat these fish raw.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28043382/protozoan-and-helminth-parasite-fauna-of-free-living-croatian-wild-wolves-canis-lupus-analyzed-by-scat-collection
#14
Carlos Hermosilla, Sonja Kleinertz, Liliana M R Silva, Jörg Hirzmann, Djuro Huber, Josip Kusak, Anja Taubert
The European wolf (Canis lupus) is a large carnivore species present in limited areas of Europe with several small populations still being considered as endangered. Wolves can be infected by a wide range of protozoan and metazoan parasites with some of them affecting free-living wolf health condition. On this account, an epidemiological survey was conducted to analyze the actual parasite fauna in Croatian wild wolves. In total, 400 individual faecal samples were collected during field studies on wolf ecology in the years 2002-2011...
January 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/27853295/rapid-identification-of-nine-species-of-diphyllobothriidean-tapeworms-by-pyrosequencing
#15
Tongjit Thanchomnang, Chairat Tantrawatpan, Pewpan M Intapan, Oranuch Sanpool, Viraphong Lulitanond, Somjintana Tourtip, Hiroshi Yamasaki, Wanchai Maleewong
The identification of diphyllobothriidean tapeworms (Cestoda: Diphyllobothriidea) that infect humans and intermediate/paratenic hosts is extremely difficult due to their morphological similarities, particularly in the case of Diphyllobothrium and Spirometra species. A pyrosequencing method for the molecular identification of pathogenic agents has recently been developed, but as of yet there have been no reports of pyrosequencing approaches that are able to discriminate among diphyllobothriidean species. This study, therefore, set out to establish a pyrosequencing method for differentiating among nine diphyllobothriidean species, Diphyllobothrium dendriticum, Diphyllobothrium ditremum, Diphyllobothrium latum, Diphyllobothrium nihonkaiense, Diphyllobothrium stemmacephalum, Diplogonoporus balaenopterae, Adenocephalus pacificus, Spirometra decipiens and Sparganum proliferum, based on the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene as a molecular marker...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27853118/traditional-living-habits-of-the-taz-tundra-population-a-paleoparasitological-study
#16
Sergey Mikhailovich Slepchenko, Sergey Nikolaevich Ivanov, Bagashev Anatoly Nikolaevich, Tsybankov Alexander Alekseevich, Slavinsky Vyacheslav Sergeyevich
An excavation of the Vesakoyakha II-IV and Nyamboyto I burial grounds was conducted during the 2014 field season, and soil samples from intact burials dating from the 19th and 20th centuries, respectively, were analyzed to determine interactions between parasites and host/vectors. Considering the discovery of Diphyllobothrium sp. and Taenia sp. eggs in soil samples from the pelvic region, diphyllobothriasis was the most frequent helminthic infection among the Taz Nenets. The Nyamboyto Nenets mainly consumed uncooked fish, while the Vesakoyakha Nenets had a bigger variety in food choices, including reindeer meat...
October 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/27734504/a-simplified-method-to-estimate-diphyllobothrium-spp-infection-in-salmonids
#17
J A Kuhn, R Knudsen, R Kristoffersen, P-A Amundsen
Some fish parasites constitute severe management problems as they may cause mortality of their fish host or are important zoonoses of humans. Parasite assessments are therefore critical to keep track of infections. If conventional sampling techniques can be simplified, parasite assessments might be easier to obtain, less time-consuming and more extensive. In this study, we compare the assessed number of Diphyllobothrium spp. cysts (CYST) with the counted number of Diphyllobothrium spp. plerocercoid larvae recovered using a conventional digestive technique (LARV)...
October 13, 2016: Journal of Fish Diseases
https://www.readbyqxmd.com/read/27658603/molecular-detection-of-spirometra-decipiens-in-the-united-states
#18
Hyeong-Kyu Jeon, Hansol Park, Dongmin Lee, Seongjun Choe, Woon-Mok Sohn, Keeseon S Eom
The genus Spirometra belongs to the family Diphyllobothriidae and order Pseudophyllidea, and includes intestinal parasites of cats and dogs. In this study, a plerocercoid labeled as Spirometra mansonoides from the USA was examined for species identification and phylogenetic analysis using 2 complete mitochondrial genes, cytochrome c oxidase I (cox1) and NADH dehydrogenase subunit 3 (nad3). The cox1 sequences (1,566 bp) of the plerocercoid specimen (USA) showed 99.2% similarity to the reference sequences of the plerocercoid of Korean Spirometra decipiens (GenBank no...
August 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/27491055/prevalence-of-diphyllobothrium-latum-cestoda-diphyllobothriidae-plerocercoids-in-fish-species-from-four-italian-lakes-and-risk-for-the-consumers
#19
Andrea Gustinelli, Vasco Menconi, Marino Prearo, Monica Caffara, Marzia Righetti, Tommaso Scanzio, Annibale Raglio, Maria Letizia Fioravanti
In recent years there has been a re-emergence of diphyllobothriasis by Diphyllobothrium latum (Cestoda: Diphyllobothriidae) in Italy, France and Switzerland, where in the past this fish-borne zoonosis was widespread and then virtually disappeared. A change in eating habits such as the consumption of raw/undercooked freshwater fish, has led to an increased risk for consumers of ingesting infective larvae of D. latum. A survey on the factors responsible for the re-emergence of human diphyllobothriasis in Italy was carried out from March 2013 to December 2014...
October 17, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27353020/invalidation-of-diphyllobothrium-hottai-cestoda-diphyllobothriidae-based-on-morphological-and-molecular-phylogenetic-analyses
#20
Azusa Banzai-Umehara, Mika Suzuki, Takahiro Akiyama, Hong-Kean Ooi, Yasushi Kawakami
Diphyllobothrium hottai Yazaki, Fukumoto & Abe, 1988 was described based on the morphology of adult worms recovered from golden hamsters that had been experimentally infected with plerocercoids obtained from Japanese surf smelts (Hypomesus pretiosus japonicus) and olive rainbow smelts (Osmerus eperlanus mordax). Although D. hottai was considered to be distinct from Diphyllobothrium ditremum (Creplin, 1825), their taxonomic relationship requires further clarification. In our study, D. hottai and D. ditremum obtained from hamsters experimentally infected with plerocercoids isolated from Japanese surf smelts were compared using morphological and molecular methods...
October 2016: Parasitology International
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