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https://www.readbyqxmd.com/read/28329274/trichinella-nativa-outbreak-with-rare-thrombotic-complications-associated-with-meat-from-a-black-bear-hunted-in-northern-ontario
#1
Daniel Dalcin, Dante S Zarlenga, Nicholas C Larter, Eric Hoberg, Daniel A Boucher, Samuel Merrifield, Rachel Lau, Filip Ralevski, Karamjit Cheema, Kevin L Schwartz, Andrea K Boggild
Background: Although trichinellosis is known to cause thrombotic disease, serious thrombotic events are rare and have not been previously associated with Trichinella nativa infection. Methods: Patient interviews and medical chart reviews were conducted on 10 men who became ill following consumption of a common source of black bear meat. Trichinella serology on patient sera as well as PCR and larval identification of the meat samples was conducted. Results: All 10 exposed individuals developed an acute illness clinically compatible with trichinellosis, characterized by fever, abdominal pain, and diarrhea, along with eosinophilia ranging from 0...
February 22, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28320455/a-systematic-review-of-taeniasis-cysticercosis-and-trichinellosis-in-vietnam
#2
REVIEW
Dinh Ng-Nguyen, Mark A Stevenson, Rebecca J Traub
Taeniasis, cysticercosis and trichinellosis have been ranked as the most important food-borne parasites of humans in terms of public health, socioeconomic and trade impact. Despite this, information on these food-borne zoonoses in Vietnam is scarce and fragmented, and many local reports remain inaccessible to the international research community. This study aims to conduct comprehensive literature searches to report on the incidence and estimate the true prevalence of taeniasis in humans and T. solium cysticercosis in humans and pigs in Vietnam utilizing Bayesian models; in addition, to report the incidence and the distribution of trichinellosis...
March 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28287594/magnetic-stirrer-method-for-the-detection-of-trichinella-larvae-in-muscle-samples
#3
Anne Mayer-Scholl, Edoardo Pozio, Jennifer Gayda, Nora Thaben, Peter Bahn, Karsten Nöckler
Trichinellosis is a debilitating disease in humans and is caused by the consumption of raw or undercooked meat of animals infected with the nematode larvae of the genus Trichinella. The most important sources of human infections worldwide are game meat and pork or pork products. In many countries, the prevention of human trichinellosis is based on the identification of infected animals by means of the artificial digestion of muscle samples from susceptible animal carcasses. There are several methods based on the digestion of meat but the magnetic stirrer method is considered the gold standard...
March 3, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28229221/the-raccoon-dog-nyctereutes-procyonoides-and-the-raccoon-procyon-lotor-their-role-and-impact-of-maintaining-and-transmitting-zoonotic-diseases-in-austria-central-europe
#4
Tanja Duscher, Adnan Hodžić, Walter Glawischnig, Georg G Duscher
The neozoan species raccoon dog (Nyctereutes procyonoides) and raccoon (Procyon lotor) are widespread in Europe and potential vectors of many diseases that can threaten human and domestic animal health. Facing a further spread of these species, it is important to know about (i) pathogens imported and/or (ii) pathogens acquired in the new habitat. Thus, we investigated the parasite fauna of wild raccoon dogs and raccoons from Austria, at the edge of their new distribution range. The eight examined raccoons were nearly free of pathogens including Baylisascaris procyonis, and thus assumed to have a low epidemiological impact, so far...
February 23, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28219418/new-insights-on-serodiagnosis-of-trichinellosis-during-window-period-early-diagnostic-antigens-from-trichinella-spiralis-intestinal-worms
#5
Zhong-Quan Wang, Ya-Li Shi, Rou-Dan Liu, Peng Jiang, Ya-Yi Guan, Ying-Dan Chen, Jing Cui
The clinical diagnosis of trichinellosis is difficult because its clinical manifestations are nonspecific. Detection of anti-Trichinella IgG by ELISA using T. spiralis muscle larval excretory-secretory (ES) antigens is the most commonly used serological method for diagnosis of trichinellosis, but the main disadvantage is false negativity during the early stage of infection. There is an obvious window period between Trichinella infection and antibody positivity.During the intestinal stage of Trichinella infection, the ES antigens of intestinal worms (intestinal infective larvae and adults) are exposed to host's immune system at the earliest time and elicit the production of specific anti-Trichinella antibodies...
February 20, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28213036/meat-sources-of-infection-for-outbreaks-of-human-trichinellosis
#6
REVIEW
Ali Rostami, H Ray Gamble, Jean Dupouy-Camet, Hooshang Khazan, Fabrizio Bruschi
Trichinellosis is one of the most important foodborne zoonotic diseases, with worldwide distribution. While human risk for trichinellosis has historically been linked to pork, modern pork production systems and slaughter inspection programs have reduced or eliminated pork as a source for trichinellosis in many countries. While pork may no longer pose a significant risk for trichinellosis, many other animal species may be hosts for Trichinella species nematodes and when human consume meat from these animal species, there may be risk for acquiring trichinellosis...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28193842/experimental-arthritis-is-dependent-on-mouse-mast-cell-protease-5
#7
Richard L Stevens, H Patrick McNeil, Lislaine A Wensing, Kichul Shin, G William Wong, Philip M Hansbro, Steven A Krilis
The constitutive heparin+ (HP) mast cells (MCs) in mice express mouse MC protease (mMCP)-5 and carboxypeptidase A (mMC CPA). The amino acid sequence of mMCP-5 is most similar to that of human chymase-1, as is the nucleotide sequences of their genes and transcripts. Using a homologous recombination approach, a C57BL/6 mouse line was created that possessed a disrupted mMCP-5 gene. The resulting mice were fertile and had no obvious developmental abnormality. Lack of mMCP-5 protein did not alter the granulation of the IL-3/IL-9-dependent mMCP 2+ MCs in the jejunal mucosa of Trichinella spiralis-infected mice...
February 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28130490/duplication-of-drosophila-melanogaster-mitochondrial-ef-tu-pre-adaptation-to-t-arm-truncation-and-exclusion-of-bulky-aminoacyl-residues
#8
Aya Sato, Takuma Suematsu, Koh-Ki Aihara, Kiyoshi Kita, Tsutomu Suzuki, Kimitsuna Watanabe, Takashi Ohtsuki, Yoh-Ichi Watanabe
Translation elongation factor Tu (EF-Tu) delivers aminoacyl-tRNA to ribosomes in protein synthesis. EF-Tu generally recognizes aminoacyl moieties and acceptor- and T-stems of aminoacyl-tRNAs. However, nematode mitochondrial (mt) tRNAs frequently lack all or part of the T-arm that is recognized by canonical EF-Tu. We previously reported that two distinct EF-Tu species, EF-Tu1 and EF-Tu2, respectively recognize mt tRNAs lacking T-arms and D-arms in the mitochondria of the chromadorean nematode Caenorhabditis elegans C...
January 27, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28128348/population-expansion-and-individual-age-affect-endoparasite-richness-and-diversity-in-a-recolonising-large-carnivore-population
#9
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
https://www.readbyqxmd.com/read/28127344/helminth-parasites-of-wild-boars-sus-scrofa-in-bushehr-province-southwestern-iran
#10
Majid Mansouri, Bahador Sarkari, Gholam Reza Mowlavi
BACKGROUND: Wild boars, Sus scrofa, of wide distribution considered as a potential source of zoonotic parasites. The current study aimed to assess the prevalence of helminth infections in wild boars in the Persian Gulf coastal area (Bushehr Province), Southwestern Iran. METHODS: Twenty-five wild boars, including 11 males and 14 females, were collected during a course of vertebrate pest control in the Bushehr Province, southwestern Iran in 2013. The specimen were immediately dissected and carefully searched for the parasites...
July 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28106258/t-cell-clones-in-human-trichinellosis-evidence-for-a-mixed-th1-th2-response
#11
C Della Bella, M Benagiano, M De Gennaro, M A Gomez-Morales, A Ludovisi, S D'Elios, S Luchi, E Pozio, M M D'Elios, F Bruschi
In humans, studies on the cellular immune response against Trichinella are scarce. Aim of this study was to characterize the cytokine profile of T cells specific for Trichinella britovi in trichinellosis patients. PATIENTS AND METHODS: Peripheral blood mononuclear cells (PBMC) were obtained from five patients involved in a trichinellosis outbreak caused by Trichinella britovi, which occurred in 2013 in Tuscany (Italy). All the patients resulted positive for Trichinella-specific IgG, IgE and presented eosinophilia...
January 20, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28103386/paraoxonase-1-activity-is-related-to-trichinella-spiralis-induced-hepatitis-in-rats
#12
Ayman Samir Farid, Eman Mohamed Fath, Shogo Mido, Nariaki Nonaka, Yoichiro Horii
BACKGROUND: Little is known about the potential adverse effects of a chronic zoonotic nematode Trichinella spiralis infection on hepatic inflammation and its relationship to paraoxonase (PON)-1 and butyrylcholinesterase (BuChE) activities. Therefore, we aimed to examine the effects of T. spiralis infection on hepatic synthesis of PON1. METHODS: Wistar rats were infected with 2500 first-stage larvae (L1) of T. spiralis, and serum PON1 and BuChE activities were evaluated...
January 19, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28094606/trichinella-surveillance-in-black-bears-ursus-americanus-from-the-dehcho-region-northwest-territories-canada-2002-2015
#13
Nicholas C Larter, Brett T Elkin, Lorry B Forbes, Brent Wagner, Danny G Allaire
We used muscle digestion to test black bears ( Ursus americanus ) from the southwestern Northwest Territories, Canada, for Trichinella. Results showed a prevalence of 4.1%. Some bears had infection intensities of more than one larva per gram (LPG) of muscle tissue; this level in meat is considered to pose a human consumption safety risk.
January 17, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28073393/study-on-the-mitochondrial-apoptosis-pathways-of-small-cell-lung-cancer-h446-cells-induced-by-trichinella-spiralis-muscle-larvae-esps
#14
Jingmei Luo, L I Yu, Guangcheng Xie, Dan Li, Meng Su, Xuerong Zhao, Luanying DU
Trichinella spiralis (T.spiralis) muscle-larva (ML) excretory-secretory proteins (ESPs) contain antitumour-active substances. ESPs have been shown to inhibit tumour growth. To explore the effects of these proteins on small cell lung cancer cells and the possible mechanisms of their antineoplastic action, H446 SCLC cells were co-cultured with different concentrations of T. spiralis ML ESPs for 12, 24 and 48 h. Our results showed that T. spiralis ML ESPs significantly inhibited H446 cell proliferation, which was dose-and time-dependent...
January 11, 2017: Parasitology
https://www.readbyqxmd.com/read/28069101/immune-responses-in-mice-vaccinated-with-a-dna-vaccine-expressing-serine-protease-like-protein-from-the-new-born-larval-stage-of-trichinella-spiralis
#15
Jing Xu, Xue Bai, Li Bo Wang, Hai Ning Shi, Joke W B VAN DER Giessen, Pascal Boireau, Ming Yuan Liu, Xiao Lei Liu
Trichinella spiralis is a parasitic helminth that can infect almost all mammals, including humans. Trichinella spiralis infection elicits a typical type 2 immune responses, while suppresses type 1 immune responses, which is in favour of their parasitism. DNA vaccines have been shown to be capable of eliciting balanced CD4+ and CD8+ T cell responses as well as humoral immune responses in small-animal models, which will be advantage to induce protective immune response against helminth infection. In this study, serine protease (Ts-NBLsp) was encoded by a cDNA fragment of new-born T...
January 10, 2017: Parasitology
https://www.readbyqxmd.com/read/28044050/piezo2-a-candidate-biomarker-for-visceral-hypersensitivity-in-irritable-bowel-syndrome
#16
Tao Bai, Ying Li, Jing Xia, Yudong Jiang, Lei Zhang, Huan Wang, Wei Qian, Jun Song, Xiaohua Hou
Background/Aim: Currently, there exists no biomarker for visceral hypersensitivity in Irritable Bowel Syndrome (IBS). Piezo proteins have been proven to play an important role in the mechanical stimulation to induce visceral pain in other tissues and may also be a biomarker candidate. The aim of this study was to test the expressions of Piezo1 and Piezo2 proteins in the intestinal epithelial cells from different intestinal segments and to explore the correlation between Piezo proteins expression and visceral pain threshold...
January 2, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/27983972/early-detection-of-trichinella-spiralis-dna-in-the-feces-of-experimentally-infected-mice-by-using-pcr
#17
Xiao Lin Liu, Hua Nan Ren, Ya Li Shi, Chen Xi Hu, Yan Yan Song, Jiang Yang Duan, Hui Ping Zhang, Xin Rui Du, Ruo Dan Liu, Peng Jiang, Zhong Quan Wang, Jing Cui
The aim of this study was to detect Trichinella spiralis DNA in mouse feces during the early stages of infection using PCR. The target gene fragment, a 1.6kb repetitive sequence of T. spiralis genome, was amplified by PCR from feces of mice infected with 100 or 300 larvae at 3-24h post infection (hpi) and 2-28dpi. The sensitivity of PCR was 0.016 larvae in feces. The primers used were highly specific for T. spiralis. No cross-reactivity was observed with the DNA of other intestinal helminths. T. spiralis DNA was detected in 100% (12/12) of feces of mice infected with 100 or 300 larvae as early as 3hpi, with the peak detection lasting to 12-24hpi, and then fluctuating before declining gradually...
February 2017: Acta Tropica
https://www.readbyqxmd.com/read/27894908/implication-of-artemisinin-nematocidal-activity-on-experimental-trichinellosis-in-vitro-and-in-vivo-studies
#18
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...
April 2017: 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
#19
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
#20
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
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