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https://www.readbyqxmd.com/read/29145405/drivers-of-house-invasion-by-sylvatic-chagas-disease-vectors-in-the-amazon-cerrado-transition-a-multi-year-state-wide-assessment-of-municipality-aggregated-surveillance-data
#1
Raíssa N Brito, David E Gorla, Liléia Diotaiuti, Anália C F Gomes, Rita C M Souza, Fernando Abad-Franch
BACKGROUND: Insecticide spraying efficiently controls house infestation by triatomine bugs, the vectors of Trypanosoma cruzi. The strategy, however, is ineffective against sylvatic triatomines, which can transmit Chagas disease by invading (without colonizing) man-made structures. Despite growing awareness of the relevance of these transmission dynamics, the drivers of house invasion by sylvatic triatomines remain poorly understood. METHODS/FINDINGS: About 12,000 sylvatic triatomines were caught during routine surveillance in houses of Tocantins state, Brazil, in 2005-2013...
November 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29144219/trypanosoma-sp-diversity-in-amazonian-bats-chiroptera-mammalia-from-acre-state-brazil
#2
Francisco C B Dos Santos, Cristiane V Lisboa, Samanta C C Xavier, Maria A Dario, Rair de S Verde, Armando M Calouro, André Luiz R Roque, Ana M Jansen
Bats are ancient hosts of Trypanosoma species and their flying ability, longevity and adaptability to distinct environments indicate that they are efficient dispersers of parasites. Bats from Acre state (Amazon Biome) were collected in four expeditions conducted in an urban forest (Parque Zoobotânico) and one relatively more preserved area (Seringal Cahoeira) in Rio Branco and Xapuri municipalities. Trypanosoma sp. infection was detected by hemoculture and fresh blood examination. Isolated parasite species were identified by the similarity of the obtained DNA sequence from 18S rDNA polymerase chain reaction and reference strains...
November 16, 2017: Parasitology
https://www.readbyqxmd.com/read/29141857/contemporary-characteristics-and-outcomes-in-chagasic-heart-failure-compared-with-other-nonischemic-and-ischemic-cardiomyopathy
#3
Li Shen, Felix Ramires, Felipe Martinez, Luiz Carlos Bodanese, Luis Eduardo Echeverría, Efraín A Gómez, William T Abraham, Kenneth Dickstein, Lars Køber, Milton Packer, Jean L Rouleau, Scott D Solomon, Karl Swedberg, Michael R Zile, Pardeep S Jhund, Claudio R Gimpelewicz, John J V McMurray
BACKGROUND: Chagas' disease is an important cause of cardiomyopathy in Latin America. We aimed to compare clinical characteristics and outcomes in patients with heart failure (HF) with reduced ejection fraction caused by Chagas' disease, with other etiologies, in the era of modern HF therapies. METHODS AND RESULTS: This study included 2552 Latin American patients randomized in the PARADIGM-HF (Prospective Comparison of ARNI With ACEI to Determine Impact on Global Mortality and Morbidity in Heart Failure) and ATMOSPHERE (Aliskiren Trial to Minimize Outcomes in Patients With Heart Failure) trials...
November 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/29141765/bionomics-and-spatial-distribution-of-triatomine-vectors-of-trypanosoma-cruzi-in-texas-and-other-southern-states-usa
#4
Rachel Curtis-Robles, Sarah A Hamer, Sage Lane, Michael Z Levy, Gabriel L Hamer
Defining spatial and temporal occurrences of triatomine vectors of Trypanosoma cruzi, the agent of Chagas disease, in the US is critical for public health protection. Through a citizen science program and field collections from 2012 to 2016, we collected 3,215 triatomines, mainly from Texas. Using morphological and molecular approaches, we identified seven Triatoma species and report sex, length, and blood engorgement status. Many citizen-collected triatomines (92.9%) were encountered indoors, in peridomestic settings, or in dog kennels and represent spillover transmission risk of T...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29141748/trypanosoma-cruzi-infection-induces-pannexin-1-channel-opening-in-cardiac-myocytes
#5
Iván Barría, Juan Güiza, Fredi Cifuentes, Pedro Zamorano, Juan C Sáez, Jorge González, José L Vega
Trypanosoma cruzi, the etiological agent of Chagas diseases, invades the cardiac tissue causing acute myocarditis and heart electrical disturbances. In T. cruzi invasion, the parasite induces [Ca(2+)]i transients in the host cells, an essential phenomenon for invasion. To date, knowledge on the mechanism that elicits transients of [Ca(2+)]i during the infection of cardiac myocytes has not been fully characterized. Pannexin1 (Panx1) channel are poorly selective channels found in all vertebrates that serve as a pathway for ATP release...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29141513/alternative-scapular-stabilization-exercises-to-target-strength-endurance-and-function-of-shoulders-in-tetraplegia-a-prospective-time-series-study
#6
Carolina Lins, Alex Castro, Giovanna I S Medina, Eliza R F B M Azevedo, Bruno S Donato, Marina S S Chagas, Janaína Roland Tancredo, Letícia Vargas de Almeida, Alberto Cliquet
OBJECTIVE: Scapular stabilization exercises (SSE) are well-established for the able-bodies. The aim of the current study is to access the potential benefits of SSE on isometric internal and external rotator strength, endurance and function of the shoulder in persons with tetraplegia, throughout a 12-week exercise program consisting of five resisted movements with elastic bands. DESIGN: Prospective non-controlled intervention study. Setting/Participants/Interventions: A convenience sample of 17 subjects (age, 40...
November 16, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29140309/biosensors-to-diagnose-chagas-disease-a-brief-review
#7
REVIEW
María-Isabel Rocha-Gaso, Luis-Jesús Villarreal-Gómez, Denis Beyssen, Frédéric Sarry, Marco-Antonio Reyna, Carlos-Napoleón Ibarra-Cerdeña
Chagas disease (CD), which mostly affects those living in deprived areas, has become one of Latin America's main public health problems. Effective prevention of the disease requires early diagnosis, initiation of therapy, and regular blood monitoring of the infected individual. However, the majority of the Trypanosoma cruzi infections go undiagnosed because of mild symptoms, limited access to medical attention and to a high variability in the sensitivity and specificity of diagnostic tests. Consequently, more affordable and accessible detection technologies capable of providing early diagnosis and T...
November 15, 2017: Sensors
https://www.readbyqxmd.com/read/29140098/surface-roughness-of-methacrylate-and-silorane-based-composites-after-finishing-and-polishing-procedures
#8
M Jacinta Santos, Heleine Maria Chagas Rêgo, Leticia Linares, Amin S Rizkalla, Gildo C Santos
OBJECTIVE: To compare the effect of surface finishing and polishing protocols on the surface roughness (Ra) of methacrylate-based and silorane-based resin composites. METHODS AND MATERIALS: Fifty specimens (5 mm x 2 mm) of each composite material were prepared using a split mold: Filtek™ Supreme Ultra (3M ESPE), Tetric EvoCeram® (Ivoclar Vivadent), Tetric Ceram™ HB (Ivoclar Vivadent), and Filtek™ LS Low Shrink (3M ESPE). Specimens were divided into five groups (n = 10) according to the following procedures: G1 - 15-µm fine diamond bur (FDB); G2 - 15-µm FDB followed by a 20-fluted tungsten carbide bur; G3 - 15-µm FDB followed by diamond-impregnated micropolishing points (D-FINE Double Diamond Polishing System, Clinician's Choice); G4 - 15-µm FDB followed by diamond-impregnated micropolishing points (Flame Point Pre-polisher and Shine, Brassseler USA); and G5 - 15-µm FDB followed by the application of a surface sealer (PermaSeal®, Ultradent Products, Inc...
November 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29137663/patent-landscape-of-neglected-tropical-diseases-an-analysis-of-worldwide-patent-families
#9
Folahanmi Tomiwa Akinsolu, Vitor Nobre de Paiva, Samuel Santos Souza, Orsolya Varga
BACKGROUND: "Neglected Tropical Diseases" (NTDs) affect millions of people in Africa, Asia and South America. The two primary ways of strategic interventions are "preventive chemotherapy and transmission control" (PCT), and "innovative and intensified disease management" (IDM). In the last 5 years, phenomenal progress has been achieved. However, it is crucial to intensify research effort into NTDs, because of the emerging drug resistance. According to the World Health Organization (WHO), the term NTDs covers 17 diseases, namely buruli ulcer, Chagas disease, dengue, dracunculiasis, echinococcosis, trematodiasis, human African trypanosomiasis, leishmaniasis, leprosy, lymphatic filariasis, onchocerciasis, rabies, schistosomiasis, soil-transmitted helminthes, taeniasis, trachoma, and yaws...
November 14, 2017: Globalization and Health
https://www.readbyqxmd.com/read/29136773/the-potential-use-of-melatonin-to-treat-protozoan-parasitic-infections-a-review
#10
REVIEW
Ahmad Daryani, Mahbobeh Montazeri, Abdol Satar Pagheh, Mehdi Sharif, Shahabeddin Sarvi, Azam Hosseinzadeh, Russel J Reiter, Ramtin Hadighi, Mohammad Taghi Joghataei, Habib Ghaznavi, Saeed Mehrzadi
Melatonin (N-acetyl-5-methoxytryptamine) is a circadian hormone produced in vertebrates by the pineal gland and other organs. Melatonin is believed to influence immune cells leading to modulation of the proliferative response of stimulated lymphocytes as well as cytokine production. Due to the antioxidant and immunomodulatory effects of melatonin, it is suggested that this molecule could be a therapeutic alternative agent to fight bacterial, viral, and parasitic infections by a variety of mechanisms. Herein, we review the effects of melatonin on the cell biology of protozoan parasites and host's immune response...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29136640/long-term-outcomes-of-the-atypical-hemolytic-uremic-syndrome-after-kidney-transplantation-treated-with-eculizumab-as-first-choice
#11
Luis Gustavo Modelli de Andrade, Mariana Moraes Contti, Hong Si Nga, Ariane Moyses Bravin, Henrique Mochida Takase, Rosa Marlene Viero, Trycia Nunes da Silva, Kelem De Nardi Chagas, Lilian Monteiro Pereira Palma
INTRODUCTION: The treatment of choice for Atypical Hemolytic Uremic Syndrome (aHUS) is the monoclonal antibody eculizumab. The objective of this study was to assess the efficacy and safety of eculizumab in a cohort of kidney transplant patients suffering from aHUS. METHODS: Description of the prospective cohort of all the patients primarily treated with eculizumab after transplantation and divided into the therapeutic (onset of aHUS after transplantation) and prophylactic use (patients with previous diagnosis of aHUS undergoing kidney transplantation)...
2017: PloS One
https://www.readbyqxmd.com/read/29134797/the-importance-of-collaboration-between-industry-academics-and-nonprofits-in-tropical-disease-drug-discovery
#12
Lori Ferrins, Michael P Pollastri
Collaborations between academic, industrial, and nonprofit companies can provide sufficient impetus to propel projects that have little economic return; such projects are prevalent in tropical disease drug discovery. In these collaborations, each partner contributes a unique set of skills and technical expertise which is advantageous to the project as a whole. Highly product-focused processes and specialized expertise sets dominate industry groups. When coupled with the strategic guidance from public-private partnerships and the academic tendency to work on high-risk projects with low financial rewards, a powerful combination results...
November 14, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29132413/germacranolide-type-sesquiterpene-lactones-from-smallanthus-sonchifolius-with-promising-activity-against-leishmania-mexicana-and-trypanosoma-cruzi
#13
Jerónimo L Ulloa, Renata Spina, Agustina Casasco, Patricia B Petray, Virginia Martino, Miguel A Sosa, Fernanda M Frank, Liliana V Muschietti
BACKGROUND: Leishmaniasis and Chagas disease are life-threatening illnesses caused by the protozoan parasites Leishmania spp. and Trypanosoma cruzi, respectively. They are known as "neglected diseases" due to the lack of effective drug treatments and the scarcity of research work devoted to them. Therefore, the development of novel and effective drugs is an important and urgent need. Natural products are an important source of bioactive molecules for the development of new drugs. In this study, we evaluated the activity of enhydrin, uvedalin and polymatin B, three sesquiterpene lactones (STLs) isolated from Smallanthus sonchifolius, on Leishmania mexicana (MNYC/BZ/62/M) and Trypanosoma cruzi (Dm28c)...
November 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29129149/anaesthetic-and-cardiorespiratory-effects-of-ketamine-plus-dexmedetomidine-for-chemical-restraint-in-black-capuchin-monkeys-sapajus-nigritus
#14
J A B Chagas, L C P Santos, J R Silva Filho, C Bondan
AIMS: To evaluate the quality of anaesthesia and cardiorespiratory effects of ketamine and two doses of dexmedetomidine in captive black capuchin monkeys (Sapajus nigritus) undergoing routine clinical examination. METHODS: Twenty-four animals undergoing routine clinical examination were enrolled in the study. Animals were briefly physically restrained and examined to ensure no obvious illness was present and that they were healthy. Monkeys were randomly allocated to two groups (n=12 per group) and then treated with a combination of I/M 7...
November 12, 2017: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29123924/in-vitro-evaluation-of-essential-oils-derived-from-piper-nigrum-piperaceae-and-citrus-limonum-rutaceae-against-the-tick-rhipicephalus-boophilus-microplus-acari-ixodidae
#15
Rafaelle Vinturelle, Camila Mattos, Jéssica Meloni, Jeane Nogueira, Maria Júlia Nunes, Itabajara S Vaz, Leandro Rocha, Viviane Lione, Helena C Castro, Evelize Folly das Chagas
The present research aimed to study the chemical composition and acaricidal activity of Citrus limonum and Piper nigrum essential oils against the cattle tick Rhipicephalus microplus. GC-MS analysis of C. limonum essential oil showed limonene (50.3%), β-pinene (14.4%), and γ-terpinene (11.7%) as the major components; P. nigrum oil was mainly composed of β-caryophyllene (26.2%), σ-ocymene (5.8%), and α-pinene (5.5%). Acaricide activity was evaluated at concentrations of 2.5, 5.0, and 10.0% (v/v) of each plant oil, as well as 1 : 1 combination of both oils (5% : 5%, 2...
2017: Biochemistry Research International
https://www.readbyqxmd.com/read/29121981/intrinsic-dna-curvature-in-trypanosomes
#16
Pablo Smircich, Najib M El-Sayed, Beatriz Garat
BACKGROUND: Trypanosoma cruzi and Trypanosoma brucei are protozoan parasites causing Chagas disease and African sleeping sickness, displaying unique features of cellular and molecular biology. Remarkably, no canonical signals for RNA polymerase II promoters, which drive protein coding genes transcription, have been identified so far. The secondary structure of DNA has long been recognized as a signal in biological processes and more recently, its involvement in transcription initiation in Leishmania was proposed...
November 9, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29121659/polyclonal-antibodies-for-the-detection-of-trypanosoma-cruzi-circulating-antigens
#17
Edith S Málaga-Machaca, Alessandra Romero-Ramirez, Robert H Gilman, Sofía Astupiña-Figueroa, Noelia Angulo, Alejandro Florentini, Cinthya J Lovon-Luque, Remo A Gonza, Ada Del Carpio-Sanz, Inés Cabello, Rosina Camargo, Fernando Recuenco, Liliam A Barrueta-Soria, Manuela R Verastegui, Maritza Calderon, Holger Mayta
BACKGROUND: Detection of Trypanosoma cruzi antigens in clinical samples is considered an important diagnostic tool for Chagas disease. The production and use of polyclonal antibodies may contribute to an increase in the sensitivity of immunodiagnosis of Chagas disease. METHODOLOGY/PRINCIPAL FINDINGS: Polyclonal antibodies were raised in alpacas, rabbits, and hens immunized with trypomastigote excreted-secreted antigen, membrane proteins, trypomastigote lysate antigen and recombinant 1F8 to produce polyclonal antibodies...
November 9, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29121016/spanish-group-defeats-shkreli-in-chagas-voucher-race
#18
Lisa Melton
No abstract text is available yet for this article.
November 9, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/29119655/targeting-host-mitochondria-a-role-for-the-trypanosoma-cruzi-amastigote-flagellum
#19
Gaelle Lentini, Nicolas Dos Santos Pacheco, Barbara A Burleigh
Trypanosoma cruzi is the kinetoplastid protozoan parasite that causes human Chagas disease, a chronic disease with complex outcomes including severe cardiomyopathy and sudden death. In mammalian hosts, T. cruzi colonizes a wide range of tissues and cell types where it replicates within the host cell cytoplasm. Like all intracellular pathogens, T. cruzi amastigotes must interact with its immediate host cell environment in a manner that facilitates access to nutrients and promotes a suitable niche for replication and survival...
November 8, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/29118740/response-to-trypanosoma-cruzi-by-human-blood-cells-enriched-with-dentritic-cells-is-controlled-by-cyclooxygenase-2-pathway
#20
Sandra C H Lonien, Aparecida D Malvezi, Helena T Suzukawa, Lucy M Yamauchi, Sueli F Yamada-Ogatta, Luiz V Rizzo, Juliano Bordignon, Phileno Pinge-Filho
Chagas disease (Cd) or American human trypanosomiasis is caused by Trypanosoma cruzi and affects ~7 million people, mostly in Latin America. The infective trypomastigote forms of the parasite can invade several human blood cell populations, including monocytes and dendritic cells (DC). Although these cells display a wide functional diversity, their interactions with T. cruzi via cyclooxygenase (COX) and cyclic adenosine monophosphate (cAMP) dependent pathways have not been analyzed. To exploiting this mechanism, DC-enriched peripheral human blood mononuclear cell populations (DC-PBMC) were used as our model...
2017: Frontiers in Microbiology
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