keyword
MENU ▼
Read by QxMD icon Read
search

Toxoplasmosis gondii

keyword
https://www.readbyqxmd.com/read/28214536/t-cell-immunoregulation-in-active-ocular-toxoplasmosis
#1
Cynthia A Cordeiro, Erica L M Vieira, Vinicius M Castro, Walderez O Dutra, Rogerio A Costa, Juliana L Orefice, Wesley R Campos, Fernando Orefice, Lucy H Young, Antonio Lucio Teixeira
Toxoplasma gondii infection is an important cause of infectious ocular disease. The physiopathology of retinochoroidal lesions associated with this infection is not completely understood. The present study was undertaken to investigate cytokine production by T cells from individuals with active toxoplasmic retinochoroiditis (TR) comparing with controls. Eighteen patients with active TR and 15 healthy controls (6 controls IgG(+) to Toxoplasma and 9 negative controls) were included in the study. Peripheral blood mononuclear cells were incubated in the presence or absence of T...
February 15, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28212681/toxoplasma-gondii-survey-in-cats-from-two-environments-of-the-city-of-rio-de-janeiro-brazil-by-modified-agglutination-test-on-sera-and-filter-paper
#2
Paula F Bolais, Philippe Vignoles, Pamela F Pereira, Rafael Keim, Abdelkrim Aroussi, Khadja Ismail, Marie-Laure Dardé, Maria Regina Amendoeira, Aurélien Mercier
BACKGROUND: Toxoplasma gondii is a protozoan with a worldwide distribution, in warm-blood animals, including humans. Local conditions and environmental disturbances may influence transmission dynamics of a zoonotic agent. This study evaluates the epidemiology of T. gondii based on toxoplasmosis prevalence in two populations of cats living in distinct urbanization conditions in Rio de Janeiro, Brazil. METHODS: Among 372 domestic cats sampled, 265 were from a public shelter located downtown Rio and 107 from a relatively preserved wild environment in a residential area...
February 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28209732/direct-measurement-of-cortical-force-generation-and-polarization-in-a-living-parasite
#3
Rachel V Stadler, Lauren A White, Ke Hu, Brian P Helmke, William H Guilford
Apicomplexa is a large phylum of intracellular parasites that are notable for the diseases they cause, including toxoplasmosis, malaria and cryptosporidiosis. A conserved motile system is critical to their lifecycles as it drives directional gliding motility between cells, as well as invasion of and egress from host cells. However, our understanding of this system is limited by a lack of measurements of the forces driving parasite motion. We used a laser trap to measure the function of the motility apparatus of living Toxoplasma gondii by adhering a microsphere to the surface of an immobilized parasite...
February 16, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28207292/occurrence-of-toxoplasma-gondii-in-carcasses-of-pigs-reared-in-intensive-systems-in-northern-italy
#4
Roberto Papini, Pierluigi di Ciccio, Marianna Marangi, Sergio Ghidini, Emanuela Zanardi, Alberto Vergara, Annunziata Giangaspero, Simona Nardoni, Guido Rocchigiani, Francesca Mancianti, Adriana Ianieri
To evaluate the occurrence of Toxoplasma gondii and to genetically characterize its isolates in carcasses of industrial fattening pigs, blood, diaphragm, and heart samples were collected from 375 carcasses of pigs slaughtered to be processed for Parma ham production. Pigs had been bred on approved farms (n = 75) located in the so-called Food Valley in Italy. Sera were examined for immunoglobulin G antibodies to T. gondii by modified agglutination test (MAT). Both heart and diaphragm samples from seropositive carcasses were processed for the presence of T...
February 16, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28202940/mitochondrial-behaviour-throughout-the-lytic-cycle-of-toxoplasma-gondii
#5
Jana Ovciarikova, Leandro Lemgruber, Krista L Stilger, William J Sullivan, Lilach Sheiner
Mitochondria distribution in cells controls cellular physiology in health and disease. Here we describe the mitochondrial morphology and positioning found in the different stages of the lytic cycle of the eukaryotic single-cell parasite Toxoplasma gondii. The lytic cycle, driven by the tachyzoite life stage, is responsible for acute toxoplasmosis. It is known that whilst inside a host cell the tachyzoite maintains its single mitochondrion at its periphery. We found that upon parasite transition from the host cell to the extracellular matrix, mitochondrion morphology radically changes, resulting in a reduction in peripheral proximity...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28191447/reexamining-chronic-toxoplasma-gondii-infection-surprising-activity-for-a-dormant-parasite
#6
Anthony P Sinai, Elizabeth A Watts, Animesh Dhara, Robert D Murphy, Matthew S Gentry, Abhijit Patwardhan
PURPOSE OF REVIEW: Despite over a third of the world's population being chronically infected with Toxoplasma gondii, little is known about this largely asymptomatic phase of infection. This stage is mediated in vivo by bradyzoites within tissue cysts. The absence of overt symptoms has been attributed to the dormancy of bradyzoites. In this review, we reexamine the conventional view of chronic toxoplasmosis in light of emerging evidence challenging both the nature of dormancy and the consequences of infection in the CNS...
December 2016: Current Clinical Microbiology Reports
https://www.readbyqxmd.com/read/28186325/evaluation-of-the-immune-response-in-balb-c-mice-induced-by-a-novel-dna-vaccine-expressing-gra14-against-toxoplasma-gondii
#7
Ehsan Ahmadpour, Shahabeddin Sarvi, Mohammad Bagher Hashemi Soteh, Mehdi Sharif, Mohammad Taghi Rahimi, Reza Valadan, Mohsen Tehrani, Alireza Khalilian, Mahbobeh Montazeri, Ahmad Daryani
Toxoplasma gondii can cause severe and even fatal disease in human beings and animals. Effective vaccines may contribute to control toxoplasmosis. GRA14, a novel secreted dense granule protein of T. gondii, has been proposed as a vaccine candidate due to its intervacuolar transport and unique topology in the parasitophorous vacuole membrane. In this study, we constructed a DNA vaccine encoding GRA14 of T. gondii. BALB/c mice were immunized intramuscularly three times at 2 week intervals and challenged with T...
February 10, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28183362/predictors-of-toxoplasma-gondii-infection-in-czech-and-slovak-populations-the-possible-role-of-cat-related-injuries-and-risky-sexual-behavior-in-the-parasite-transmission
#8
J Flegr
The protozoan Toxoplasma gondii infects about one-third of the world's population. The consumption of raw meat, contact with cats, contact with soil, and ingestion of food or water contaminated with soil are considered to be the most important sources of infection. Still in most women who were infected during pregnancy, no definitive source of infection is found. In 2014-2016, independent sources of T. gondii infection were searched for by gathering epidemiological data from 1865 (519 infected) responders. Touching garden soil (odds ratio (OR) 3·14, 95% confidence interval (CI) 1·3-6·35), sustaining cat-related injuries (OR 2·16, 95% CI 1·25-3·74), and eating improperly washed root vegetables (OR 1·71, 95% CI 1·02-2·87), but not risky sexual behavior (OR 1·22, 95% CI 0·79-1·90), were the predictors of infection...
February 10, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28182168/drugs-in-development-for-toxoplasmosis-advances-challenges-and-current-status
#9
REVIEW
P Holland Alday, Joseph Stone Doggett
Toxoplasma gondii causes fatal and debilitating brain and eye diseases. Medicines that are currently used to treat toxoplasmosis commonly have toxic side effects and require prolonged courses that range from weeks to more than a year. The need for long treatment durations and the risk of relapsing disease are in part due to the lack of efficacy against T. gondii tissue cysts. The challenges for developing a more effective treatment for toxoplasmosis include decreasing toxicity, achieving therapeutic concentrations in the brain and eye, shortening duration, eliminating tissue cysts from the host, safety in pregnancy, and creating a formulation that is inexpensive and practical for use in resource-poor areas of the world...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28170109/modulation-of-host-immune-responses-to-toxoplasma-gondii-by-micrornas
#10
Yihong Cai, Jilong Shen
To survive successfully, Toxoplasma counteracts the strictly regulated host innate response to downregulate inflammation that could be deleterious for the parasite. MicroRNAs are vital regulators of both innate and adaptive immunity, controlling the maintenance and development of immune progenitors as well as the differentiation and the functions of host mature immune cells. Thus the complexity of mechanisms underlying the connection between Toxoplasma and host immunity has led to investigations of miRNAs as additional key molecular players...
February 7, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28168222/tgprelid-a-mitochondrial-protein-linked-to-multidrug-resistance-in-the-parasite-toxoplasma-gondii
#11
Victoria Jeffers, Edwin T Kamau, Ananth R Srinivasan, Jonathan Harper, Preethi Sankaran, Sarah E Post, Joseph M Varberg, William J Sullivan, Jon P Boyle
New drugs to control infection with the protozoan parasite Toxoplasma gondii are needed as current treatments exert toxic side effects on patients. Approaches to develop novel compounds for drug development include screening of compound libraries and targeted inhibition of essential cellular pathways. We identified two distinct compounds that display inhibitory activity against the parasite's replicative stage: F3215-0002, which we previously identified during a compound library screen, and I-BET151, an inhibitor of bromodomains, the "reader" module of acetylated lysines...
January 2017: MSphere
https://www.readbyqxmd.com/read/28163699/a-systematic-review-of-in-vitro-and-in-vivo-activities-of-anti-toxoplasma-drugs-and-compounds-2006-2016
#12
REVIEW
Mahbobeh Montazeri, Mehdi Sharif, Shahabeddin Sarvi, Saeed Mehrzadi, Ehsan Ahmadpour, Ahmad Daryani
The currently available anti-Toxoplasma agents have serious limitations. This systematic review was performed to evaluate drugs and new compounds used for the treatment of toxoplasmosis. Data was systematically collected from published papers on the efficacy of drugs/compounds used against Toxoplasma gondii (T. gondii) globally during 2006-2016. The searched databases were PubMed, Google Scholar, Science Direct, ISI Web of Science, EBSCO, and Scopus. One hundred and eighteen papers were eligible for inclusion in this systematic review, which were both in vitro and in vivo studies...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28153801/on-the-determination-of-toxoplasma-gondii-virulence-in-mice
#13
REVIEW
Pooja Saraf, E Keats Shwab, Jitender P Dubey, Chunlei Su
Toxoplasma gondii is one of the most successful pathogens on earth, capable of infecting an extremely broad range of mammals and birds and causing potentially fatal disease in humans. The house mouse (Mus musculus) has been used as the primary laboratory animal model for determining the virulence of T. gondii strains. Epidemiological evidence also suggests a potential association between virulence in mice and disease severity in human toxoplasmosis. However, many factors can affect virulence measurements, including route of infection, life stage of the parasite, number of passages of the parasite in mice or cell culture, and the mouse host line used...
January 30, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28148907/seroprevalence-of-toxoplasma-gondii-in-hunted-wild-boars-sus-scrofa-from-southeastern-france
#14
Cedric Roqueplo, Radu Blaga, Marie Jean-Lou, Isabelle Vallee, Bernard Davoust
Toxoplasma gondii (Nicolle et Manceaux, 1908) is an obligate intracellular, parasitic protozoan within the phylum Apicomplexa that causes toxoplasmosis in mammalian hosts (including humans) and birds. Since meat of wild boar, Sus scrofa (Linnaeus), has been demonstrated to be a potential source of human infection, a careful evaluation of the prevalence of infection with T. gondii in hunted animals is needed to protect public health. In the Var area in southeastern France, we performed a spatio-temporal survey in order to investigate the prevalence of IgG antibodies in wild boars shot by hunters in the Canjuers military camp during two subsequent hunting seasons...
January 25, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/28148555/targeting-toxoplasma-gondii-cpsf3-as-a-new-approach-to-control-toxoplasmosis
#15
Andrés Palencia, Alexandre Bougdour, Marie-Pierre Brenier-Pinchart, Bastien Touquet, Rose-Laurence Bertini, Cristina Sensi, Gabrielle Gay, Julien Vollaire, Véronique Josserand, Eric Easom, Yvonne R Freund, Hervé Pelloux, Philip J Rosenthal, Stephen Cusack, Mohamed-Ali Hakimi
Toxoplasma gondii is an important food and waterborne pathogen causing toxoplasmosis, a potentially severe disease in immunocompromised or congenitally infected humans. Available therapeutic agents are limited by suboptimal efficacy and frequent side effects that can lead to treatment discontinuation. Here we report that the benzoxaborole AN3661 had potent in vitro activity against T. gondii Parasites selected to be resistant to AN3661 had mutations in TgCPSF3, which encodes a homologue of cleavage and polyadenylation specificity factor subunit 3 (CPSF-73 or CPSF3), an endonuclease involved in mRNA processing in eukaryotes...
February 1, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28145222/protective-immunity-against-toxoplasmosis-in-mice-induced-by-single-dose-immunization-with-rsag1-2-protein-released-from-poly-lactide-co-glycolide-microparticles
#16
Shu-Chun Chuang, Yao-Chi Chung, Chung-Da Yang
Triphasic sustained release of tachyzoite chimeric protein, rSAG1/2, from poly(lactide-co-glycolide) (PLG)-encapsulated rSAG1/2 (PLG-rSAG1/2) microparticles (MPs) is a promising characteristic for developing a single-dose vaccine against Toxoplasma gondii in domestic animals. In the present study, we aimed to evaluate whether single immunization with PLG-rSAG1/2 MPs in BALB/c mice would achieve effective immunity and protection against T. gondii. Peritoneal immunization of mice with a single dose of PLG-rSAG1/2 MPs enhanced serum IgG titers and lymphocyte proliferation in a triphasic model over a long 12-week period...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28138769/molecular-and-virulence-characterization-of-toxoplasma-gondii-strains-isolated-from-humans-in-portugal
#17
Anabela Vilares, Maria João Gargaté, Idalina Ferreira, Susana Martins, João Paulo Gomes
Toxoplasma gondii is an apicomplexan parasite responsible for toxoplasmosis which infects all warm-blooded vertebrates, including mammals and birds. The majority of studies conducted in Europe have revealed that more than 80 % of strains isolated from human infections belong to genotype II, whereas genotypes I and III are responsible for a small number of cases. Atypical and recombinant strains are generally associated with more severe infections. In Portugal, there is a lack of data concerning genetic diversity as the classical typing studies in humans have never been performed...
March 2017: Parasitology Research
https://www.readbyqxmd.com/read/28138052/estimating-burdens-of-neglected-tropical-zoonotic-diseases-on-islands-with-introduced-mammals
#18
Luz A de Wit, Donald A Croll, Bernie Tershy, Kelly M Newton, Dena Spatz, Nick D Holmes, A Marm Kilpatrick
Many neglected tropical zoonotic diseases are maintained by introduced mammals, and on islands the most common introduced species are rodents, cats, and dogs. Management of introduced mammals, including control or eradication of feral populations, which is frequently done for ecological restoration, could also reduce or eliminate the diseases these animals carry. Understanding the burden of these zoonotic diseases is crucial for quantifying the potential public health benefits of introduced mammal management...
January 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28127354/dna-amplification-techniques-for-the-detection-of-toxoplasma-gondii-tissue-cysts-in-meat-producing-animals-a-narrative-review-article
#19
REVIEW
Farooq Riaz, Imran Rashid, Haroon Akbar, Wasim Shehzad, Saher Islam, Amna Arshad Bajwa, Khalid Saeed, Kamran Ashraf
BACKGROUND: Toxoplasma gondii is an intracellular parasite, which infects one-third population of world. Humans and animals acquire infection by ingesting oocytes from feces of cats or by meat of other animals having cysts that may lead to congenital, ocular or cephalic toxoplasmosis. Either it is important to detect T. gondii from meat of food animals from retail shops or directly at slaughterhouses, which is meant for export. METHODS: The current research was done without time limitation using such terms as follows: "Toxoplasma gondii", "Meat", "Tissue cyst", "PCR", "LAMP", "Screening" and "Immunological assay" alone or in combination, in English language...
October 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28127336/genotyping-of-toxoplasma-gondii-strains-isolated-from-patients-with-ocular-toxoplasmosis-in-iran
#20
Maryam Norouzi, Seyyed Javad Seyyed Tabaei, Maryam Niyyati, Vafa Saber, Hamed Behniafar
BACKGROUND: Toxoplasma gondii is an obligate, intracellular protozoon that develops its sexual stage in cat's intestinal epithelial cells as definitive host and develops its asexual stage in different tissues of a wide range hosts called intermediate host. The protozoon is a food-borne and worldwide parasite that can cause serious complications such as abortion in pregnant women, encephalitis, and ocular toxoplasmosis. The present study aimed to genotype T. gondii strains isolated from patients with toxoplasmic retinochoroiditis...
July 2016: Iranian Journal of Parasitology
keyword
keyword
42533
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"