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https://www.readbyqxmd.com/read/27894908/implication-of-artemisinin-nematocidal-activity-on-experimental-trichinellosis-in-vitro-and-in-vivo-studies
#1
Dina M Abou Rayia, Abeer E Saad, Dalia S Ashour, Radwa M Oreiby
Benzimidazole drugs are used for treatment of trichinellosis, but they have a limited effect against encapsulated larval stages of Trichinella spiralis. Hence, there is a considerable interest in developing new anthelmintic drugs. Our aim is to investigate the possible effect of artemisinin on T. spiralis in in vitro and in vivo studies. T. spiralis worms were isolated from infected mice and transferred to 3 culture media; group I: with no drugs, group II: contained artemisinin and group III: contained mebendazole, then they were subjected to electron microscopic study...
November 25, 2016: Parasitology International
https://www.readbyqxmd.com/read/27884442/the-induction-of-the-collagen-capsule-synthesis-by-trichinella-spiralis-is-closely-related-to-protease-activated-receptor-2
#2
Mi Kyung Park, Min Kyoung Cho, Shin Ae Kang, Bo Young Kim, Hak Sun Yu
The muscle-stage larvae of the parasite Trichinella spiralis have the ability to survive within host muscle tissue by virtue of the formation a nurse cell-parasite complex, which is surrounded by collagen. The formation of the complex is initiated by excretory-secretory (ES) proteins produced by the parasite. To determine the mechanisms underlying collagen capsule formation, we investigated the expression levels of several types of collagen genes and TGF-βI signaling-related genes (Smad2 and Smad3) in muscle cells...
October 30, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27882479/albendazole-microcrystal-formulations-based-on-chitosan-and-cellulose-derivatives-physicochemical-characterization-and-in-vitro-parasiticidal-activity-in-trichinella-spiralis-adult-worms
#3
Josefina Priotti, Ana V Codina, Darío Leonardi, María D Vasconi, Lucila I Hinrichsen, María C Lamas
The oral route has notable advantages to administering dosage forms. One of the most important questions to solve is the poor solubility of most drugs which produces low bioavailability and delivery problems, a major challenge for the pharmaceutical industry. Albendazole is a benzimidazole carbamate extensively used in oral chemotherapy against intestinal parasites, due to its extended spectrum activity and low cost. Nevertheless, the main disadvantage is the poor bioavailability due to its very low solubility in water...
November 23, 2016: AAPS PharmSciTech
https://www.readbyqxmd.com/read/27882304/metabolic-and-adaptive-immune-responses-induced-in-mice-infected-with-tissue-dwelling-nematode-trichinella-zimbabwensis
#4
N Onkoba, M J Chimbari, J M Kamau, S Mukaratirwa
Tissue-dwelling helminths are known to induce intestinal and systemic inflammation accompanied with host compensatory mechanisms to counter balance nutritional and metabolic deficiencies. The metabolic and immune responses of the host depend on parasite species and tissues affected by the parasite. This study investigated metabolic and immuno-inflammatory responses of mice infected with tissue-dwelling larvae of Trichinella zimbabwensis and explored the relationship between infection, metabolic parameters and Th1/Th17 immune responses...
2016: Open veterinary journal
https://www.readbyqxmd.com/read/27870901/ubiquitin-dependent-modification-of-skeletal-muscle-by-the-parasitic-nematode-trichinella-spiralis
#5
Rhiannon R White, Amy H Ponsford, Michael P Weekes, Rachel B Rodrigues, David B Ascher, Marco Mol, Murray E Selkirk, Steven P Gygi, Christopher M Sanderson, Katerina Artavanis-Tsakonas
Trichinella spiralis is a muscle-specific parasitic worm that is uniquely intracellular. T. spiralis reprograms terminally differentiated skeletal muscle cells causing them to de-differentiate and re-enter the cell cycle, a process that cannot occur naturally in mammalian skeletal muscle cells, but one that holds great therapeutic potential. Although the host ubiquitin pathway is a common target for viruses and bacteria during infection, its role in parasite pathogenesis has been largely overlooked. Here we demonstrate that the secreted proteins of T...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27870858/first-report-of-the-occurrence-of-trichinella-specific-antibodies-in-domestic-pigs-in-central-and-eastern-uganda
#6
Kristina Roesel, Karsten Nöckler, Maximilian P O Baumann, Reinhard Fries, Michel M Dione, Peter-Henning Clausen, Delia Grace
Previous research on trichinellosis in Africa focused on isolating Trichinella from wildlife while the role of domestic pigs has remained highly under-researched. Pig keeping in Uganda is historically recent, and evidence on zoonotic pig diseases, including infection with Trichinella species, is scarce. A cross-sectional survey on Trichinella seroprevalence in pigs was conducted in three districts in Central and Eastern Uganda from April 2013 to January 2015. Serum from a random sample of 1125 pigs from 22 villages in Eastern and Central Uganda was examined to detect immunoglobulin G (IgG) against any Trichinella spp...
2016: PloS One
https://www.readbyqxmd.com/read/27853121/immune-correlates-of-resistance-to-trichinella-spiralis-reinfection-in-mice
#7
Ki-Back Chu, Sang-Soo Kim, Su-Hwa Lee, Dong-Hun Lee, Ah-Ra Kim, Fu-Shi Quan
The immune correlate of host resistance induced by reinfection of Trichinella spiralis remains unclear. In this study, we investigated immune correlates between the resistance and serum IgG antibody level, CD23(+) IgM(+) B cells, and eosinophil responses induced by T. spiralis reinfection. Mice were primarily infected with 10 or 100 T. spiralis larvae (10 TS, 100 TS), respectively, and after 4 weeks, they were challenge infected with 100 T. spiralis larvae (10-100 TS, 100-100 TS). Upon challenge infections, 10-100 TS mice induced significantly higher levels of T...
October 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/27816842/parasite-to-patient-a-quantitative-risk-model-for-trichinella-spp-in-pork-and-wild-boar-meat
#8
Frits Franssen, Arno Swart, Joke van der Giessen, Arie Havelaar, Katsuhisa Takumi
Consumption of raw or inadequately cooked pork meat may result in trichinellosis, a human disease due to nematodes of the genus Trichinella. In many countries worldwide, individual control of pig carcasses at meat inspection is mandatory but incurs high costs in relation to absence of positive carcasses from pigs reared under controlled housing. EU regulation 2015/1375 implements an alternative risk-based approach, in view of absence of positive findings in pigs under controlled housing conditions. Moreover, Codex Alimentarius guidelines for the control of Trichinella spp...
October 26, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27809983/seroepidemiologic-study-on-the-prevalence-of-toxoplasma-gondii-and-trichinella-spp-infections-in-black-bears-ursus-americanus-in-pennsylvania-usa
#9
Jitender P Dubey, Justin Brown, Mark Ternent, Shiv K Verma, Dolores E Hill, Camila K Cerqueira-Cézar, Oliver C H Kwok, Rafael Calero-Bernal, Jan G Humphreys
The protozoan Toxoplasma gondii and the metazoan Trichinella spp. infect virtually all warm-blooded animals, including birds, humans, livestock, and marine mammals. Both parasitic infections can cause serious illness in human beings and can be acquired by ingesting under-cooked meat harboring infective stages. Approximately 3500 black bears (Ursus americanus) are legally-harvested each year in Pennsylvania, USA during the November hunting season. Among animals found infected with T. gondii, the prevalence of T...
October 15, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27809931/trichinella-spiralis-paramyosin-activates-mouse-bone-marrow-derived-dendritic-cells-and-induces-regulatory-t-cells
#10
Kai Guo, Ximeng Sun, Yuan Gu, Zixia Wang, Jingjing Huang, Xinping Zhu
BACKGROUND: Dendritic cells (DCs) are antigen-presenting cells that regulate T cell responses for many infectious diseases. The tissue-dwelling nematode Trichinella spiralis expresses paramyosin (TsPmy) not only as a structural protein but also as an immunomodulator to alleviate complement attack by binding to some host complement components. Whether TsPmy is involved in other immunomodulatory pathway and how TsPmy interacts with host DCs is still unknown. METHODS: Mouse bone marrow-derived DCs were incubated with recombinant TsPmy (rTsPmy) for activation...
November 4, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27802332/anti-arthritic-activity-of-schistosoma-mansoni-and-trichinella-spiralis-derived-antigens-in-adjuvant-arthritis-in-rats-role-of-foxp3-treg-cells
#11
Maha M Eissa, Dalia K Mostafa, Amany A Ghazy, Mervat Z El Azzouni, Laila M Boulos, Layla K Younis
A growing body of evidence supports the concept of helminths therapy in a variety of autoimmune diseases. Here, we aimed to investigate the protective effects of autoclaved Schistosoma mansoni antigen (ASMA) and Trichinella spiralis antigen (ATSA) on the clinical and immunopathological features of rheumatoid arthritis (RA). Adjuvant arthritis was induced by subcutaneous and intradermal injections of complete Freund's adjuvant into the plantar surface of the right hind paw and the root of the tail, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27796563/development-of-an-immunodiagnosis-method-using-recombinant-pscp-for-detection-of-paragonimus-skrjabini-infection-in-human
#12
Shasha Yu, Xilin Zhang, Wenbi Chen, Hong Zheng, Guoping Ai, Nan Ye, Ying Wang
Paragonimiasis skrjabini is a kind of zoonosis and prevalent in 16 provinces in China, such as Chongqing, Fujian, Sichuan, and Yunnan. However, sensitive and efficient diagnostic methods for the infection are limited. In order to provide a more convenient and simple method for serologic diagnosis, the recombinant P. skrjabini cysteine protease (PsCP) was expressed, purified, and then used to develop an indirect enzyme-linked immunosorbent assay (ELISA) for detecting anti-PsCP antibodies in human. Given the positive/negative cutoff value as 0...
October 28, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27780019/regulatory-issues-associated-with-preharvest-food-safety-european-union-perspective
#13
Lis Alban
Free movement of safe and wholesome food is an essential aspect of any society. This article contains an updated description of the regulatory issues associated with preharvest food safety within the European Union. Salmonella, Campylobacter, Trichinella, antimicrobial resistance, and bovine spongiform encephalopathy are dealt with in detail. Moreover, Cysticercus bovis/Taenia saginata, Toxoplasma, Yersinia, verotoxigenic/shigatoxigenic Escherichia coli, Listeria, and foodborne viruses are briefly covered. The article describes how the focus in the European Union is changing to involve a supply chain view with a focus on cost-effectiveness...
October 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/27773519/immunomodulatory-potential-of-particular-trichinella-spiralis-muscle-larvae-excretory-secretory-components
#14
J Cvetkovic, Lj Sofronic-Milosavljevic, N Ilic, M Gnjatovic, I Nagano, A Gruden-Movsesijan
Excretory-secretory antigens of Trichinella spiralis muscle larvae can induce the semi-matured status of rat dendritic cells. This may at least partly be the consequence of transient activation of extracellular signal-regulated kinases 1/2 (ERK1/2). Here we investigated the potential of several components of excretory-secretory antigens (native fraction containing 45, 49 and 53kDa proteins and recombinant Tsp53, representing one of the constituents of this fraction) to demonstrate previously observed effects of excretory-secretory antigens on dendritic cells in vitro, characterised by establishment of a particular phenotype (very low MHC II expression, moderate CD86 expression and significant ICAM-1 expression) and functional properties (low production of pro-inflammatory cytokine IL-12p70, and high production of IL-10 and TGF-β)...
December 2016: International Journal for Parasitology
https://www.readbyqxmd.com/read/27771802/evaluation-of-the-infectivity-and-the-persistence-of-trichinella-patagoniensis-in-muscle-tissue-of-decomposing-guinea-pig-cavia-porcellus
#15
F Fariña, M Pasqualetti, J Ilgová, N Cardillo, M Ercole, T Aronowicz, S Krivokapich, M Kašný, M Ribicich
Trichinella patagoniensis, a new species of Trichinella, is widespread in Argentina. The success of parasite transmission depends, among other factors, on the resistance of L1 larvae present in the muscle tissue (ML) of dead hosts undergoing the decomposition process in different environmental conditions. The aim of the present work was to study the infectivity of T. patagoniensis muscle larvae in Cavia porcellus and the capability of the parasite to survive in decomposed muscle tissue of guinea pigs subjected to different environmental conditions...
October 22, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27760716/proteomic-analysis-of-trichinella-spiralis-adult-worm-excretory-secretory-proteins-recognized-by-early-infection-sera
#16
Ruo Dan Liu, Xin Qi, Ge Ge Sun, Peng Jiang, Xi Zhang, Li Ang Wang, Xiao Lin Liu, Zhong Quan Wang, Jing Cui
At the intestinal stage of a Trichinella spiralis (T. spiralis) infection, the excretory-secretory (ES) antigens produced by adult worms (AWs) result in an early exposure to the host's immune system and elicit the production of specific antibodies; the AW ES proteins might provide early diagnostic markers of trichinellosis. The aim of this study was to identify early serodiagnostic markers from T. spiralis AW ES antigens. T. spiralis AWs were collected at 72h post infection, and their ES antigens were analysed by SDS-PAGE and Western blot...
October 11, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27747155/first-findings-of-trichinella-spiralis-and-dna-of-echinococcus-multilocularis-in-wild-raccoon-dogs-in-the-netherlands
#17
Miriam Maas, Sanne van den End, Annika van Roon, Jaap Mulder, Frits Franssen, Cecile Dam-Deisz, Margriet Montizaan, Joke van der Giessen
The recent invasion of the raccoon dog in the Netherlands may be associated with the risk of introduction and spread of zoonotic pathogens. The aim of this study was to assess whether Echinococcus multilocularis and Trichinella spp. infections are present in Dutch raccoon dogs. Between 2013 and 2014, nine raccoon dogs, mainly road kills, were collected for necropsies. One raccoon dog tested repeatedly positive in the qPCR for E. multilocularis. The positive raccoon dog was collected in the province of Flevoland, which is not a known endemic region for E...
December 2016: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/27743486/resiniferatoxin-lowers-tnf-%C3%AE-no-and-pge2-in-the-intestinal-phase-and-the-parasite-burden-in-the-muscular-phase-of-t-spiralis-infection
#18
José Luis Muñoz-Carrillo, José Jesús Muñoz-Escobedo, Claudia H Maldonado-Tapia, Francisca Chávez-Ruvalcaba, María Alejandra Moreno-García
During the course of infection with Trichinella spiralis, an inflammatory response is triggered at the intestinal level in the host, playing a crucial role in the expulsion and elimination of the parasite. However, several studies have demonstrated that this inflammatory response is harmful to the host; hence the importance of studying molecules with therapeutic potential like resiniferatoxin, which is known to have an anti-inflammatory effect both in-vitro and in-vivo. In this article, we evaluated the anti-inflammatory activity of resiniferatoxin during the intestinal phase of T...
October 15, 2016: Parasite Immunology
https://www.readbyqxmd.com/read/27736779/nonencapsulated-trichinella-pseudospiralis-infection-impairs-follicular-helper-t-cell-differentiation-with-subclass-selective-decreases-in-antibody-responses
#19
Kazunobu Asano, Zhiliang Wu, Piyarat Srinontong, Takahide Ikeda, Isao Nagano, Hirokuyi Morita, Yoichi Maekawa
Infectious microorganisms often modify host immunity to escape from immune elimination. Trichinella is a unique nematode of the helminth family, whose members parasitize the muscle cells inside the host without robust eliminative reactions. There are several species of Trichinella; some develop in muscle cells that become encapsulated (e.g., Trichinella spiralis) and others in cells that do not encapsulate (e.g., Trichinella pseudospiralis). It has already been established that Trichinella infection affects host immune responses in several experimental immune diseases in animal models; however, most of those studies were done using T...
December 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27723790/serological-evidence-of-exposure-to-globally-relevant-zoonotic-parasites-in-the-estonian-population
#20
Brian Lassen, Marilin Janson, Arvo Viltrop, Kädi Neare, Pirje Hütt, Irina Golovljova, Lea Tummeleht, Pikka Jokelainen
We investigated Estonian population and its selected subgroups for serological evidence of exposure to Ascaris lumbricoides, Echinococcus spp., Taenia solium, Toxocara canis, Toxoplasma gondii, and Trichinella spiralis. Serum samples from 999 adults representing general population, 248 children aged 14-18, 158 veterinarians, 375 animal caretakers, and 144 hunters were tested for specific immunoglobulin G antibodies against the selected parasites using commercial enzyme immunoassays (ELISA). Sera yielding positive or twice grey zone Echinococcus spp, T...
2016: PloS One
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