Shiwanthi L Ranasinghe, Vanessa Rivera, Glen M Boyle, Donald P McManus
Modulating the tumor microenvironment to promote an effective immune response is critical in managing any type of tumor. Melanoma is an aggressive skin cancer and the incidence rate is increasing worldwide. Potent protease inhibitors have recently been extensively researched as potential therapeutic agents against various cancers. EgKI-1 is a potent Kunitz type protease inhibitor identified from the canine tapeworm Echinococcus granulosus that has shown anti-cancer activities in vivo. In this study we show that EgKI-1 significantly reduced the growth of melanoma in the B16-F0 mouse model and was not toxic to normal surrounding tissue...
November 7, 2019: Scientific Reports
D Ramos-Sarmiento, V Chiluisa-Utreras
Echinococcosis is a zoonotic parasitic illness that can cause significant disabilities, and even death for sick people. The disease is caused by the larval stage of cestodes belonging to the Echinococcus genus. In this study, multiple hydatid cysts were excised from an infected porcine liver. The identification of the parasitic species was made by the morphometric assessment of rostellar hooks and molecular detection of ribosomal DNA extant in protoscoleces of the hydatid sand. Rostellar hooks presented an average length of 27...
November 4, 2019: Journal of Helminthology
A Radačovská, E Bazsalovicsová, I Králová-Hromadová
Diphyllobothriosis is a fish-borne parasitic zoonosis caused by so-called "broad tapeworms" or "fish tapeworms" of different genera of the order Diphyllobothriidea. Dibothriocephalus latus (Linnaeus 1758), (syn. Diphyllobothrium latum) , is a medically important type species of the genus, whose occurrence in various European regions is either regular, e.g. in the Alpine lakes region, or occasional and sporadic, e. g. in the Danube River region. For the latter, data on the detection of D...
September 2019: Helminthologia
T Mačák Kubašková, D Mudroňová, M Gergeľ-Čechová, G Hrčková
The metacestode stage of the tapeworm Mesocestoides vogae ( M. vogae ) has the ability of asexual growth in the peritoneal cavity of rodents and other intermediate hosts without restriction. Early immunological events have decisive role in the establishment of infection. In the present study we investigated the kinetic of myeloid and lymphoid cell populations and the proportions of cells undergoing apoptosis in peritoneal cavities of mice within the first month after oral infection with M. vogae larvae. Proportions of cell phenotypes and apoptotic cells were examined by flow cytometry and by microscopical analysis of cells following May/Grünwald staining and fluorescent stain Hoechst 33234, respectively...
September 2019: Helminthologia
R K Schuster
During a survey on tapeworm larval stages in Artemia franciscana from an artificial pond in Dubai, United Arab Emirates, a high prevalence of Eurycestus avoceti -like cysticercoids was established. Adult male and female crustaceans showed a prevalence of 61.9 and 62.7 %, respectively. The intensity ranged from one to four and one to three cyst, respectively. Out of 215 examined cysticercoids, 207 specimens had morphological features matching with E. avoceti . The flaky structure of the surrounding capsule, the elongated shape of the cysticercoid and the larger number of hooklets on the suckers suggest that the eight further larval cestodes belonged to another species of the genus Eurycestus ...
June 2019: Helminthologia
Tomáš Scholz, Anindo Choudhury, Lucie Uhrová, Jan Brabec
In the present paper, species of the Proteocephalus -aggregate de Chambrier, Zehnder, Vaucher, and Mariaux, 2004 (Cestoda: Proteocephalidae) reported from centrarchid and percid fishes in North America are reviewed, and their taxonomic status is critically assessed based on a study of type specimens and new material from Canada and the United States. The following 3 species, supposedly strictly specific to their fish definitive hosts, are recognized as valid: (1) Proteocephalus fluviatilis Bangham, 1925 (new synonyms Proteocephalus osburni Bangham, 1925 and Proteocephalus microcephalus Haderlie, 1953 ; Proteocephalus ' robustus ' nomen nudum) from the smallmouth and largemouth bass, Micropterus dolomieu (Lacépède) (type host) and Micropterus salmoides (Lacépède) (both Centrarchidae); (2) Proteocephalus luciopercae Wardle, 1932 (new synonym Proteocephalus stizostethi Hunter and Bangham, 1933 ) from the walleye, Sander vitreus (Mitchill) (type host), and sauger, Sander canadensis (Griffith et Smith) (Percidae); and (3) Proteocephalus pearsei La Rue, 1919 , a parasite of the yellow perch, Perca flavescens Mitchill (Percidae)...
October 2019: Journal of Parasitology
Tran Thi Tam, Nguyen Thi Kim Lan, Pham Ngoc Doanh
Moniezia expansa and M. benedeni are two common tapeworm species of domestic ruminants over the world. However, their morphological and molecular data are available for limited specimens from a few countries. In the present study, we compared morphological characteristics of these two species collected from goats and cattle in northern Vietnam and analyzed their phylogenetic relationship based on the 5.8S and second internal transcribed spacer (ITS2) of nuclear ribosomal DNA and the mitochondrial cytochrome c oxidase subunit I gene (cox1)...
October 18, 2019: Parasitology International
Roman Kuchta, Alžbeta Radačovská, Eva Bazsalovicsová, Gustavo Viozzi, Liliana Semenas, Marina Arbetman, Tomáš Scholz
Diphyllobothriosis is a reemerging zoonotic disease because of global trade and increased popularity of eating raw fish. We present molecular evidence of host switching of a human-infecting broad fish tapeworm, Dibothriocephalus latus, and use of salmonids as intermediate or paratenic hosts and thus a source of human infection in South America.
November 2019: Emerging Infectious Diseases
Guo-Qiang Zhu, Li Li, John Asekhaen Ohiolei, Yan-Tao Wu, Wen-Hui Li, Nian-Zhang Zhang, Bao-Quan Fu, Hong-Bin Yan, Wan-Zhong Jia
BACKGROUND: Taenia hydatigena, T. multiceps, T. pisiformis, and Dipylidium caninum are four common large and medium-sized tapeworms parasitizing the small intestine of dogs and other canids. These parasites cause serious impact on the health and development of livestock. However, there are, so far, no commercially available molecular diagnostic kits capable of simultaneously detecting all four parasites in dogs. The aim of the study was therefore to develop a multiplex PCR assay that will accurately detect all four cestode infections in one reaction...
October 16, 2019: BMC Infectious Diseases
Shuichi Miyamoto, Shuhei Hayasaka, Yoshimasa Kudo, Yuta Sasaoka, Sonoe Yoshida, Kenji Kinoshita, Jun Ito, Taiki Kudo, Kazuteru Hatanaka, Yoshiya Yamamoto, Hirohito Naruse, Naoya Sakamoto
No abstract text is available yet for this article.
June 2019: ACG Case Reports Journal
Wang Guan, Xiaoqin Zhang, Xiao Wang, Shun Lu, Jun Yin, Jinxin Zhang
Cystic echinococcosis (CE), a devastating zoonotic condition caused by the tapeworm Echinococcus granulosus , remain a significant public health problem worldwide. However, after a negative correlation between solid tumor and CE has been incidentally discovered, accumulating evidence have suggested that this parasite may induce anticancer effect through activating host immune response and secreting molecules with anticancer potential, which may provide some new understanding for immunotherapy. This article will review the evidence supporting the anticancer effect of E...
2019: Frontiers in Pharmacology
Ehsan Ahmadpour, Zahra Godrati-Azar, Adel Spotin, Roghayeh Norouzi, Hamed Hamishehkar, Sanam Nami, Peyman Heydarian, Saba Rajabi, Maryam Mohammadi, Gregorio Perez-Cordon
BACKGROUND: The larval stage of the tapeworm Echinococcus granulosus is the causative agent of hydatid disease in humans. This zoonotic parasitic infection remains a major health problem in certain areas of the world where is still endemic. In view of the ineffectiveness of some drug treatments, the surgical removal of cysts remains the preferred treatment option together with the administration of albendazole and mebendazole. However, severe side effects of these drugs have been reported which demands developing new scolicidal agents that confer suitable efficacy and fewer side effects during surgery...
October 10, 2019: Parasites & Vectors
Katarzyna Królaczyk, Katarzyna M. Kavetska, Vadim V. Kornyushin
During the parasitological examination of 288 wild ducks from north-western Poland, 18 tapeworms were found in the intestines (jejunum, ileum and rectum) of six birds, which, based on the structure of the scolex, internal organs and the presence of cirrus with an internal additional sac, were determinated as Dicranotaenia stenosacculata Macko, 1988. Tapeworms were found in two young females Bucephala clangula, one young female Aythya marila as well as two adult males Aythya fuligula. The aim of the study was to present the morphological and ecological characteristics of the species, recently discovered for the first time in the fauna of Poland...
2019: Annals of Parasitology
Marta Juszczak, Nikola Sadowska, Jan Udała
The aim of the study was to determine the prevalence and intensity of parasite infection of the digestive tract in sheep and goats from the West Pomerania region following anti-parasite treatment. Feces were freely collected from sheep and goats kept on organic farms and subjected to analysis by the Willis-Schlaf and McMaster’s flotation methods. The mean extensity of infection by gastrointestinal parasites in both sheep and goats was found to be 100%. Both sheep and goats displayed the presence of gastrointestinal nematodes, Eimeria protozoa and Moniezia spp...
2019: Annals of Parasitology
Chandni Verma, Anshu Chaudhary, Bindu Sharma, Hridaya Shanker Singh
INTRODUCTION: During an investigation, a rare cestode species belonging to the genus, Oochoristica were found in Meerut, UP, India, from the intestine of the host, Hemidactylus brookii Gray, 1845 (Reptilia: Gekkonidae). The tapeworms were found to be similar in their morphological characters with Oochoristica hemidactyli Johri, 1955 (Cestoda: Linstowiidae). MATERIALS AND METHODS: The host Hemidactylus brookii used in this analysis was caught from May to July 2018 from Department of Zoology, Chaudhary Charan Singh University, Meerut (UP), India...
September 30, 2019: Acta Parasitologica
Michael Reinehr, Charlotte Micheloud, Felix Grimm, Philipp A Kronenberg, Johannes Grimm, Annika Beck, Juliane Nell, Cordula Meyer Zu Schwabedissen, Eva Furrer, Beat Müllhaupt, Thomas F E Barth, Peter Deplazes, Achim Weber
Infection of humans by the larval stage of the tapeworms Echinococcus granulosus sensu lato or Echinococcus multilocularis causes the life-threatening zoonoses cystic echinococcosis (CE) and alveolar echinococcosis (AE). Although cystic liver lesions are a hallmark of both diseases, course, prognosis, and patients' management decisively differ between the two. The wide and overlapping spectrum of morphologies and the limited availability of ancillary tools are challenges for pathologists to reliably diagnose and subtype echinococcosis...
September 20, 2019: American Journal of Surgical Pathology
Kamal Chtira, Lamia Benantar, Houssaine Aitlhaj, Hasna Abdourafiq, Yassine Elallouchi, Khalid Aniba
Intra-orbital hydatid cyst is a very rare pathological entity that affects children and the young adults; it is secondary to the development in the orbit of the echinococcus granulosis tapeworm. Its frequency does not exceed 1% of all cases of hydatid disease. Clinical presentation of intra-orbital hydatid cyst is dominated by proptosis and a decrease in visual acuity, complete surgical excision is difficult, evolution is generally better when the treatment is early before the installation of irreversible optic atrophy...
2019: Pan African Medical Journal
Tania Rozario, Edward B Quinn, Jianbin Wang, Richard E Davis, Phillip A Newmark
Tapeworms grow at rates rivaling the fastest-growing metazoan tissues. To propagate they shed large parts of their body; to replace these lost tissues they regenerate proglottids (segments) as part of normal homeostasis. Their remarkable growth and regeneration are fueled by adult somatic stem cells that have yet to be characterized molecularly. Using the rat intestinal tapeworm, Hymenolepis diminuta , we find that regenerative potential is regionally limited to the neck, where head-dependent extrinsic signals create a permissive microenvironment for stem cell-driven regeneration...
September 24, 2019: ELife
Haobing Zhang, Congshan Liu, Qi Zheng
China was once a country plagued by parasitic diseases. At the beginning of the founding of the People's Republic of China, nearly 80% of the population suffered from parasitic diseases because of poverty and poor sanitary conditions. After nearly 70 years of development, China has made remarkable achievements in the prevention and control of parasitic diseases, and the prevalence of parasitic diseases has been greatly reduced. In addition to organizational leadership from the government and various preventive measures, drug treatment and drug research & development are important and irreplaceable links in prevention and control work...
December 2019: Acta Tropica
Xue-Yong Zhang, Ying-Na Jian, Hong Duo, Xiu-Ying Shen, Yi-Juan Ma, Yong Fu, Zhi-Hong Guo
Coenurosis is an important zoonotic helminthic disease caused by the larval stage of the tapeworm Taenia multiceps. This parasite typically infects the brain of the intermediate hosts, including sheep, goat, cattle and even humans. We report a case of T. multiceps infection in a yak confirmed by clinical symptoms, morphological characteristics, and molecular and phylogenetic analyses. The coenurus was thin-walled, whitish, and spherical in shape with a diameter of 10 cm. The parasite species was identified as T...
August 2019: Korean Journal of Parasitology
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