22 results on '"Miyoko Massago"'
Search Results
2. Applicability of machine learning algorithm to predict the therapeutic intervention success in Brazilian smokers
- Author
-
Miyoko Massago, Mamoru Massago, Pedro Henrique Iora, Sanderland José Tavares Gurgel, Celso Ivam Conegero, Idalina Diair Regla Carolino, Maria Muzanila Mushi, Giane Aparecida Chaves Forato, João Vitor Perez de Souza, Thiago Augusto Hernandes Rocha, Samile Bonfim, Catherine Ann Staton, Oscar Kenji Nihei, João Ricardo Nickenig Vissoci, and Luciano de Andrade
- Subjects
Medicine ,Science - Published
- 2024
3. Designing, development and validation of an app to reduce the response time of the emergency medical services.
- Author
-
Júlia Loverde Gabella, Iago Amado Peres Gualda, Isadora Laguila Altoé, Matheus Henrique Arruda Beltrame, Pedro Henrique Aguillar da Silva, Dalton Breno Costa, Fernando César Grossi Paggi, Sérgio Sanches Fabres Filho, Miyoko Massago, Luiz Gustavo de Paulo, Marcos Rogério Bitencourt, Anjni Patel Joiner, João Ricardo Nickenig Vissoci, and Luciano de Andrade
- Subjects
Medicine ,Science - Abstract
IntroductionDelays in prehospital care attributable to the call-taking process can often be traced back to miscommunication, including uncertainty around the call location. Geolocation applications have the potential to streamline the call-taking process by accurately identifying the caller's location.ObjectiveTo develop and validate an application to geolocate emergency calls and compare the response time of calls made via the application with those of conventional calls made to the Brazilian Medical Emergency System (Serviço de Atendimento Médico de Urgência-SAMU).MethodsThis study was conducted in two stages. First, a geolocating application for SAMU emergency calls (CHAMU192) was developed using a mixed methods approach based on design thinking and subsequently validated using the System Usability Scale (SUS). In the second stage, sending time of the geolocation information of the app was compared with the time taken to process information through conventional calls. For this, a hypothetical case control study was conducted with SAMU in the Maringá, Paraná, Brazil. A control group of 350 audio recordings of emergency calls from 2019 was compared to a set of test calls made through the CHAMU192 app. The CHAMU192 group consisted of 201 test calls in Maringá. In test calls, the location was obtained by GPS and sent to the SAMU communication system. Comparative analysis between groups was performed using the Mann-Whitney test.ResultsCHAMU192 had a SUS score of 90, corresponding to a "best imaginable" usability rating. The control group had a median response time of 35.67 seconds (26.00-48.12). The response time of the CHAMU192 group was 0.20 (0.15-0.24).ConclusionThe use of the CHAMU192 app by emergency medical services could significantly reduce response time. The results demonstrate the potential of app improving the quality and patient outcomes related to the prehospital emergency care services.
- Published
- 2024
- Full Text
- View/download PDF
4. Impact of socioeconomic factors and health determinants on preterm birth in Brazil: a register-based study
- Author
-
Luciano de Andrade, Arthi S. Kozhumam, Thiago Augusto Hernandes Rocha, Dante Grapiuna de Almeida, Núbia Cristina da Silva, Rejane Christine de Souza Queiroz, Miyoko Massago, Sharla Rent, Luiz Augusto Facchini, Antônio Augusto Moura da Silva, Catherine Ann Staton, João Ricardo Nickenig Vissoci, and Erika Barbara Abreu Fonseca Thomaz
- Subjects
Brazil ,Preterm birth ,Child health ,Maternal health ,Primary health care or Primary health care ,Gynecology and obstetrics ,RG1-991 - Abstract
Abstract Background More than 15 million children are born preterm annually. While preterm survival rates have increased in high-income countries. Low- and middle-income countries, like Brazil, continue to battle high neonatal mortality rates due to a lack of adequate postnatal care. Globally, neonatal mortality is higher for preterm infants compared to those born at term. Our study aims to map and analyze the spatial, socioeconomic, and health coverage determinants related to preterm birth in Brazil in order to understand how spatial variations in demographics and access to primary care may affect preterm birth occurrences. Methods Using publicly available national-level data from the Brazilian health system for 2008–2017, we conducted an ecological study to visualize the spatial distributions of preterm birth along with socioeconomic status, the structure of health services, and primary care work process, each consisting of multiple variables reduced via principal component analysis. Regression models were created to determine predictive effects of numeric and spatial variation of these scores on preterm birth rates. Results In Brazil, preterm birth rates increased from 2008–2017, with small and rural municipalities frequently exhibiting higher rates than urban areas. Scores in socioeconomic status and work process were significant predictors of preterm birth rates, without taking into account spatial adjustment, with more positive scores in socioeconomic status predicting higher preterm birth rates (coefficient 0.001145) and higher scores in work process predicting lower preterm birth rates (coefficient -0.002416). Geographically weighted regression showed socioeconomic status to be a more significant predictor in the North, with the work process indicators being most significant in the Northeast. Conclusions Results support that primary care work process indicators are more significant in estimating preterm birth rates than physical structures available for care. These results emphasize the importance of ensuring the presence of the minimum human resources needed, especially in the most deprived areas of Brazil. The association between social determinants of health and preterm birth rates raises questions regarding the importance of policies dedicated to foster equity in the accessibility of healthcare services, and improve income as protective proxies for preterm birth.
- Published
- 2022
- Full Text
- View/download PDF
5. Mortality in Women with Coronary Artery Disease in Paraná State, Brazil: A Bayesian Spatiotemporal Analysis
- Author
-
Marcelo Puzzi, Miyoko Massago, Júlia Loverde Gabella, Samile Bonfim de Oliveira, Daniel Augusto Message dos Santos, Fernanda Shizue Nishida Carignano, Sandra Marisa Pelloso, Lincoln Luis Silva, Oscar Kenji Nihei, Maria Dalva de Barros Carvalho, Amanda de Carvalho Dutra, and Luciano de Andrade
- Subjects
coronary artery disease ,health disparities ,women’s health ,epidemiology ,spatiotemporal analysis ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Mortality resulting from coronary artery disease (CAD) among women is a complex issue influenced by many factors that encompass not only biological distinctions but also sociocultural, economic, and healthcare-related components. Understanding these factors is crucial to enhance healthcare provisions. Therefore, this study seeks to identify the social and clinical variables related to the risk of mortality caused by CAD in women aged 50 to 79 years old in Paraná state, Brazil, between 2010 and 2019. Methods: This is an ecological study based on secondary data sourced from E-Gestor, IPARDES, and DATASUS. We developed a model that integrates both raw and standardized coronary artery disease (CAD) mortality rates, along with sociodemographic and healthcare service variables. We employed Bayesian spatiotemporal analysis with Markov Chain Monte Carlo simulations to assess the relative risk of CAD mortality, focusing specifically on women across the state of Paraná. Results: A total of 14,603 deaths from CAD occurred between 2010 and 2019. Overall, temporal analysis indicates that the risk of CAD mortality decreased by around 22.6% between 2010 (RR of 1.06) and 2019 (RR of 0.82). This decline was most prominent after 2014. The exercise stress testing rate, accessibility of cardiology centers, and IPARDES municipal performance index contributed to the reduction of CAD mortality by approximately 4%, 8%, and 34%, respectively. However, locally, regions in the Central-West, Central-South, Central-East, and Southern regions of the Central-North parts of the state exhibited risks higher-than-expected. Conclusion: In the last decade, CAD-related deaths among women in Paraná state decreased. This was influenced by more exercise stress testing, better access to cardiology centers, improved municipal performance index. Yet, elevated risks of deaths persist in certain regions due to medical disparities and varying municipal development. Therefore, prioritizing strategies to enhance women’s access to cardiovascular healthcare in less developed regions is crucial.
- Published
- 2024
- Full Text
- View/download PDF
6. Exploring regional disparities in lung cancer mortality in a Brazilian state: A cross-sectional ecological study.
- Author
-
Vlaudimir Dias Marques, Miyoko Massago, Mariana Teixeira da Silva, Igor Roskowski, Daniel Augusto Nunes de Lima, Lander Dos Santos, Estela Louro, Simone Tomás Gonçalves, Raissa Bocchi Pedroso, Armstrong Mbi Obale, Sandra Marisa Pelloso, João Ricardo Nickenig Vissoci, Catherine Ann Staton, Oscar Kenji Nihei, Maria Dalva de Barros Carvalho, Amanda de Carvalho Dutra, and Luciano de Andrade
- Subjects
Medicine ,Science - Abstract
BackgroundLung cancer (LC) is one of the main causes of mortality in Brazil; geographic, cultural, socioeconomic and health access factors can affect the development of the disease. We explored the geospatial distribution of LC mortality, and associated factors, between 2015 and 2019, in Parana state, Brazil.Methods and findingsWe obtained mortality (from the Brazilian Health Informatics Department) and population rates (from the Brazilian Institute of Geography and Statistics [IBGE]) in people over 40 years old, accessibility of oncology centers by municipality, disease diagnosis rate (from Brazilian Ministry of Health), the tobacco production rate (IBGE) and Parana Municipal Performance Index (IPDM) (from Parana Institute for Economic and Social Development). Global Moran's Index and Local Indicators of Spatial Association were performed to evaluate the spatial distribution of LC mortality in Parana state. Ordinary Least Squares Regression and Geographically Weighted Regression were used to verify spatial association between LC mortality and socioeconomic indicators and health service coverage. A strong spatial autocorrelation of LC mortality was observed, with the detection of a large cluster of high LC mortality in the South of Parana state. Spatial regression analysis showed that all independent variables analyzed were directly related to LC mortality by municipality in Paraná.ConclusionsThere is a disparity in the LC mortality in Parana state, and inequality of socioeconomic and accessibility to health care services could be associated with it. Our findings may help health managers to intensify actions in regions with vulnerability in the detection and treatment of LC.
- Published
- 2023
- Full Text
- View/download PDF
7. Applicability of machine learning technique in the screening of patients with mild traumatic brain injury
- Author
-
Miriam Leiko Terabe, Miyoko Massago, Pedro Henrique Iora, Thiago Augusto Hernandes Rocha, João Vitor Perez de Souza, Lily Huo, Mamoru Massago, Dalton Makoto Senda, Elisabete Mitiko Kobayashi, João Ricardo Vissoci, Catherine Ann Staton, and Luciano de Andrade
- Subjects
Medicine ,Science - Abstract
Even though the demand of head computed tomography (CT) in patients with mild traumatic brain injury (TBI) has progressively increased worldwide, only a small number of individuals have intracranial lesions that require neurosurgical intervention. As such, this study aims to evaluate the applicability of a machine learning (ML) technique in the screening of patients with mild TBI in the Regional University Hospital of Maringá, Paraná state, Brazil. This is an observational, descriptive, cross-sectional, and retrospective study using ML technique to develop a protocol that predicts which patients with an initial diagnosis of mild TBI should be recommended for a head CT. Among the tested models, he linear extreme gradient boosting was the best algorithm, with the highest sensitivity (0.70 ± 0.06). Our predictive model can assist in the screening of mild TBI patients, assisting health professionals to manage the resource utilization, and improve the quality and safety of patient care.
- Published
- 2023
8. Correction: Applicability of machine learning technique in the screening of patients with mild traumatic brain injury.
- Author
-
Miriam Leiko Terabe, Miyoko Massago, Pedro Henrique Iora, Thiago Augusto Hernandes Rocha, João Vitor Perez de Souza, Lily Huo, Mamoru Massago, Dalton Makoto Senda, Elisabete Mitiko Kobayashi, João Ricardo Vissoci, Catherine Ann Staton, and Luciano de Andrade
- Subjects
Medicine ,Science - Abstract
[This corrects the article DOI: 10.1371/journal.pone.0290721.].
- Published
- 2023
- Full Text
- View/download PDF
9. AVALIAÇÃO HIGIÊNICO-SANITÁRIA DE CARNE MOÍDA COMERCIALIZADA EM AÇOUGUES DA CIDADE DE SARANDI, PR, BRASIL
- Author
-
Caroline Rodrigues de ALMEIDA, Miyoko MASSAGO, and Sara Macente BONI
- Subjects
microbiological analysis ,bacteria ,ground beef ,Medicine ,Pharmacy and materia medica ,RS1-441 - Abstract
The beef consumption by Brazilian population has increased in recent years. However, the processing of this product can facilitate its contamination by microorganisms and trigger outbreaks of food infections. Based on the previous information, the present study aimed to evaluate the hygienic sanitary quality of ground beef marketed in 20 butcheries in the city of Sarandi, PR. Samples of 50 grams of the product were collected in each establishment. Then, the presence of total and thermotolerant coliforms was evaluated by Most Probable Number technique and Salmonella spp. by the growth in a specific medium. The presence of thermotolerant coliform was observed in all sample analyzed, but in none of them had growth of Salmonella spp. The presence of Escherichia coli in foods indicate a failure in the hygienic sanitary procedures, emphasizing the importance of implementing tools that promote improvement in the good hygiene practices, to reduce the contamination index of these products and to increase the quality of customer’s life.
- Published
- 2018
- Full Text
- View/download PDF
10. Efeitos transgeracionais do tabagismo materno durante a gestação e amamentação
- Author
-
Miyoko MASSAGO and Elaine Schultz DWORAK
- Subjects
crianças ,tabagismo ,gravidez ,Medicine ,Pharmacy and materia medica ,RS1-441 - Abstract
Mundialmente, aproximadamente 250 milhões de mulheres são fumantes, inclusive na gravidez podendo ocasionar graves consequências às suas proles. Diante disso, o presente trabalho objetivou-se realizar uma revisão de literatura sobre os efeitos transgeracionais do tabagismo materno durante a gestação e amamentação, usando como banco de dados o Lilacs, Pubmed e Scielo. Foi possível observar que o tabagismo materno durante a gestação pode levar a alterações fisiológicas, biológicas e hábitos alimentares nas diferentes fases do desenvolvimento do indivíduo ocasionando danos irreversíveis ao mesmo devido às programações cardiometabólicas durante as etapas cruciais do seu desenvolvimento.
- Published
- 2018
- Full Text
- View/download PDF
11. Sympatry influence in the interaction of Trypanosoma cruzi with triatomine
- Author
-
Elaine Schultz Dworak, Silvana Marques de Araújo, Mônica Lúcia Gomes, Miyoko Massago, Érika Cristina Ferreira, and Max Jean de Ornelas Toledo
- Subjects
Trypanosoma cruzi DTU ,Rhodnius robustus ,Triatoma sordida ,Sympatric coevolution ,Non-sympatric coevolution ,Arctic medicine. Tropical medicine ,RC955-962 - Abstract
Abstract INTRODUCTION: Trypanosoma cruzi, the etiologic agent of Chagas disease, is widely distributed in nature, circulating between triatomine bugs and sylvatic mammals, and has large genetic diversity. Both the vector species and the genetic lineages of T. cruzi present a varied geographical distribution. This study aimed to verify the influence of sympatry in the interaction of T. cruzi with triatomines. Methods: The behavior of the strains PR2256 (T. cruzi II) and AM14 (T. cruzi IV) was studied in Triatoma sordida (TS) and Rhodnius robustus (RR). Eleven fifth-stage nymphs were fed by artificial xenodiagnosis with 5.6 × 103 blood trypomastigotes/0.1mL of each T. cruzi strain. Every 20 days, their excreta were examined for up to 100 days, and every 30 days, the intestinal content was examined for up to 120 days, by parasitological (fresh examination and differential count with Giemsa-stained smears) and molecular (PCR) methods. Rates of infectivity, metacyclogenesis and mortality, and mean number of parasites per insect and of excreted parasites were determined. RESULTS: Sympatric groups RR+AM14 and TS+PR2256 showed higher values of the four parameters, except for mortality rate, which was higher (27.3%) in the TS+AM14 group. General infectivity was 72.7%, which was mainly proven by PCR, showing the following decreasing order: RR+AM14 (100%), TS+PR2256 (81.8%), RR+PR2256 (72.7%) and TS+AM14 (36.4%). CONCLUSIONS: Our working hypothesis was confirmed once higher infectivity and vector capacity (flagellate production and elimination of infective metacyclic forms) were recorded in the groups that contained sympatric T. cruzi lineages and triatomine species.
- Full Text
- View/download PDF
12. Built environment influence on the incidence of elderly pedestrian collisions in a medium-large city in southern Brazil: a spatial analysis
- Author
-
Mariana Teixeira da Silva, Pedro Henrique Iora, Miyoko Massago, Amanda de Carvalho Dutra, Júlia Loverde Gabella, Lincoln Luís Silva, Fernanda Shizue Nishida Carignano, Eniuce Menezes de Souza, Armstrong Mbi Obale, João Ricardo Nickenig Vissoci, Anjni Patel Joiner, Catherine Ann Staton, Oscar Kenji Nihei, and Luciano de Andrade
- Subjects
Public Health, Environmental and Occupational Health ,Safety Research - Published
- 2023
- Full Text
- View/download PDF
13. Redução do uso de medicação em praticantes de meditação transcendental
- Author
-
Marco Antonio Costa, Alliny Ayumi Yoshida Yamada, Miyoko Massago, Indra Karina Zubieta Merubia Merubia, Vitória Dekkers Carneiro, and Celso Ivam Conegero
- Subjects
General Medicine - Abstract
Ao proporcionar o relaxamento do corpo e da mente, a prática regular de Meditação Transcendental (MT) pode reduzir o uso de fármacos. O objetivo do trabalho foi avaliar a redução do uso de medicação em praticantes regulares de Meditação Transcendental Sidhi, na cidade de Maringá, noroeste do Paraná. No final de 2021, um questionário estruturado foi respondido por 46 meditantes Shida de um projeto de extensão universitária desenvolvido na Universidade Estadual de Maringá, campus sede. Observou-se que ao aprender a meditar, 23,9% dos entrevistados deixaram de utilizar fármacos, principalmente psicotrópicos; 21,7% diminuíram a dosagem de analgésicos e/ou anti-inflamatórios e 6,5% incitaram o tratamento farmacológico de doenças crônicas de base. Do total dos respondentes, 60,9% relataram terem se automedicado durante as suas vidas, e 17,4% das possíveis combinações farmacológicas apresentavam a possibilidade de interação medicamentosa, principalmente entre os psicotrópicos e/ou analgésicos com eles mesmos ou com outros fármacos. Fatores psíquicos, fisiológicos, sociais e ambientais podem influenciar o desenvolvimento e tratamento das patologias. Conclui-se que ao reduzir o uso de fármacos e possíveis interações medicamentosas, a MT é uma possível alternativa para complementar o tratamento de doenças relacionadas principalmente ao sistema nervoso central e evitar o uso indiscriminado de fármacos de venda livre.
- Published
- 2023
- Full Text
- View/download PDF
14. Perfil das bactérias patogênicas nas águas minerais comercializadas no Brasil: um panorama de 2010 a 2019
- Author
-
Miyoko Massago, Rosana Hogaha Leite Machado, and Celso Ivam Conegero
- Abstract
Introdução: Apesar do aumento na procura pela água mineral (AM) no Brasil, nem sempre ela apresenta a qualidade adequada para o consumo humano, visto que pode estar contaminada por patógenos. Objetivos: Realizar uma revisão sistemática da literatura sobre o perfil das bactérias patogénicas (BP) nas AM comercializadas no Brasil. Métodos: Foram selecionados artigos originais publicados entre 2010 e 2019, no SciELO, PUBMED e/ou LILACS, utilizando os seguintes descritores em Ciências da Saúde: “água mineral”, “bactérias”, “patógenos”, “controle microbiológico” e “Brasil”, e logística borealiana “E” e “OU”. Resultados: Treze artigos descreviam a contaminação por BP em pelo menos uma das amostras analisadas, e das 381 amostras avaliadas, 51,5% apresentavam estes microrganismos. Além disso, em alguns casos, ocorria a sobreposição de bactérias, sendo que os patógenos mais descritos foram os coliformes totais (13/13 artigos) e fecais (12/13 artigos). Entretanto, em percentual, as mais prevalentes foram os coliformes totais (30,2% das amostras) e Pseudomonas aeruginosa (22,8% das amostras). Discussão: A alta taxa de bactérias patogênicas nas amostras de AM descritas pela literatura representa um risco à saúde do consumidor, pois, é um gatilho para a ocorrência de inúmeras patologias. Conclusão: Há a necessidade de se reavaliar as legislações vigentes e maior fiscalização dos produtos e comerciantes de água mineral no Brasil, visto que, embora exista uma legislação estabelecendo os limites máximos aceitáveis microrganismos, a literatura relata que há uma elevada taxa de contaminação por bactérias patogênicas. Portanto, impróprio para a venda e o consumo humano.
- Published
- 2022
- Full Text
- View/download PDF
15. ÁGUA MINERAL COMERCIALIZADA NO BRASIL: CARACTERIZAÇÃO, CONSUMO E QUALIDADE MICROBIOLÓGICA
- Author
-
Idalina Diair Regla Carolino, Rosana Hogaha Leite Machado, Luiz Felipe Carvalho Marinho, Elaine Schultz Dworak, Miyoko Massago, and Celso Ivam Conegero
- Subjects
0303 health sciences ,03 medical and health sciences ,030306 microbiology ,General Medicine ,030304 developmental biology - Abstract
Devido à preocupação com a qualidade da água distribuída pelas redes públicas de saneamento, muitos brasileiros têm recorrido àquela denominada mineral, mas nem sempre ela é mais saudável. Diante do exposto, o objetivo do presente estudo foi realizar uma revisão integrativa de literatura sobre caracterização, consumo e qualidade microbiológica da água mineral comercializada no Brasil, por meio da busca de legislações e normas governamentais brasileiras, bem como artigos publicados nos principais sites científicos. Observou-se que de forma geral, água mineral é aquela extraída do subsolo e que tenha uma composição definida, e que para que ela seja considerada potável, deve estar isenta de patógenos e toxinas. Para se avaliar se há ou não os microrganismos patogênicos nestas amostras podem ser utilizados a técnica dos tubos múltiplos, teste C, contagem de bactérias heterotróficas e método do substrato cromogênico. Neste contexto observou-se que a maioria dos artigos analisados descrevia a presença de pelo menos um microrganismo contaminante. Quase todos os autores realizam apenas uma avaliação dos produtos e apesar do estado de São Paulo ser o maior produtor e consumidor de água mineral no Brasil, não foram encontrados artigos originais sobre o assunto, publicados entre os anos de 2014 e 2018.
- Published
- 2021
- Full Text
- View/download PDF
16. DESLOCAMENTO ESPACIAL E TEMPO DE TRANSFERÊNCIA PRIMÁRIA DOS PACIENTES TRAUMATIZADOS NAS RODOVIAS DO ESTADO DO PARANÁ, BRASIL
- Author
-
Luiz Gustavo de Paulo, Miyoko Massago, Julia Loverde Gabella, and Luciano de Andrade
- Published
- 2022
- Full Text
- View/download PDF
17. Mice Intragastric Infected with Insect and Blood Trypomastigotes of Trypanosoma cruzi IV: Differences and Similarities on the Evolution Profile and Response to Etiological Treatment
- Author
-
Max Jean de Ornelas Toledo, Miyoko Massago, Alexandre Tadachi Morey, Gerson Zanusso Junior, Elisama Loubak da Silva, Mônica Lúcia Gomes, and Elaine Schultz Dworak
- Subjects
medicine.medical_specialty ,Insecta ,Cyclophosphamide ,Trypanosoma cruzi ,030231 tropical medicine ,Parasitemia ,030308 mycology & parasitology ,Microbiology ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Medical microbiology ,parasitic diseases ,medicine ,Animals ,Chagas Disease ,Infectivity ,0303 health sciences ,biology ,Inoculation ,biology.organism_classification ,medicine.disease ,Parasitology ,Benznidazole ,medicine.drug - Abstract
Our goal was to analyze the outcome of infection and response to benznidazole (BZ) treatment in mice intragastrically inoculated with trypomastigotes forms of Trypanosoma cruzi from different origins. Twenty-four Swiss mice were divided in two groups and inoculated, by gavage, with 1 × 104 blood trypomastigotes (BT) or insect-derived metacyclic trypomastigotes (IT) of AM14 strain (T. cruzi IV). Half of the animals of each group were treated with BZ (TBZ), from 10 to 30th days after the inoculation, and the other constituted the untreated control groups (NT). After the etiological treatment, all mice were immunosuppressed with cyclophosphamide for three weeks. Parasitological and molecular parameters, infectivity, cumulative mortality, and reactivation post-immunosuppression rates were obtained. Animals inoculated with BT showed lower pre-patent period and early day of the maximum parasitemia, as well as a higher maximum peak of parasitemia than the IT animals. However, both, BT and IT animals, did not respond to BZ treatment (0.0% of cure). We conclude that the infective form influences in the outcome of infection, but not the response to the etiological treatment in mice intragastrically infected with the T. cruzi IV strain studied.
- Published
- 2020
18. Efficacy of essential oil of Syzygium aromaticum alone and in combination with benznidazole on murine oral infection with Trypanosoma cruzi IV
- Author
-
Gerson Zanusso Junior, Miyoko Massago, Danielle Kian, and Max Jean de Ornelas Toledo
- Subjects
Male ,0301 basic medicine ,Chagas disease ,Syzygium ,Trypanosoma cruzi ,medicine.medical_treatment ,030231 tropical medicine ,030106 microbiology ,Immunology ,Parasitemia ,Pharmacology ,law.invention ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Pharmacotherapy ,law ,Oils, Volatile ,medicine ,Animals ,Humans ,Plant Oils ,Chagas Disease ,Cyclophosphamide ,Essential oil ,Immunosuppression Therapy ,Chemotherapy ,biology ,Inoculation ,General Medicine ,biology.organism_classification ,medicine.disease ,Trypanocidal Agents ,Insect Vectors ,Infectious Diseases ,Nitroimidazoles ,Benznidazole ,Rhodnius ,Drug Therapy, Combination ,Parasitology ,Immunosuppressive Agents ,medicine.drug - Abstract
Chagas disease (CD), caused by Trypanosoma cruzi, remains a serious public health problem. One of the causes of the high morbidity and mortality in patients is the lack of an effective drug therapy. Thus, the aim of this study was to evaluate the efficacy of the essential oil of Syzygium aromaticum alone and in combination with benznidazole (BZ) in mice orally inoculated with strain of T. cruzi IV obtained from oral CD outbreak occurred in Western Brazilian Amazonia. All the animals inoculated with metacyclic trypomastigote forms (AM14 strain, BZ resistant), derived from the insect Rhodnius robustus, became infected and there was no difference in the mortality rate between the experimental groups. When compared with untreated control animals (UTC), the treatment with essential oil of S. aromaticum (EOSA) alone promoted reduction in 1/5 parameters derived from the parasitemia curve, whereas the treatments with BZ alone or in combination (BZ + EOSA) promoted reduction in 4/5 of those parameters, presenting similar profiles of parasitemia curve. The animals treated with BZ and with the combination BZ + EOSA presented lower patency periods in comparison with the animals in EOSA group, and lower positivity of blood cultures when compared with the UTC group. The results of molecular analysis by qPCR in both blood and cardiac tissue did not show differences between the groups. The cure rates obtained with the different treatments presented the following ascending order: EOSA = 12.5% (1/8), BZ = 25.0% (2/8) and BZ + EOSA = 37.5% (3/8). Although there are no significant differences between them, these results claims that the use of this essential oil could be of interest for treatment of Chagas disease.
- Published
- 2018
- Full Text
- View/download PDF
19. Experimental infection of Rhodnius robustus Larrousse, 1927 (Hemiptera, Reduviidae, Triatominae) with Trypanosoma cruzi (Chagas, 1909) (Kinetoplastida, Trypanosomatidae) IV
- Author
-
Carolina Dale, Max Jean de Ornelas Toledo, Miyoko Massago, Silvana Marques de Araújo, Nilma de Souza Fernandes, Ana Paula de Abreu, Cleber Galvão, Ana Paula Margioto Teston, Hevillyn Fernanda Lucas da Silva, and Érika Cristina Ferreira
- Subjects
Nymph ,biology ,Trypanosoma cruzi ,Immunology ,Zoology ,Kinetoplastida ,General Medicine ,biology.organism_classification ,Polymerase Chain Reaction ,Hemiptera ,Insect Vectors ,Mice ,Infectious Diseases ,Reduviidae ,Rhodnius ,Rhodnius robustus ,Animals ,Humans ,Chagas Disease ,Parasitology ,Triatominae - Abstract
Vector competence of triatomines (kissing bugs) for Trypanosoma cruzi transmission depends on the parasite-vector interaction and the genetic constitution of both. This study evaluates the susceptibility and vector competence of Rhodnius robustus experimentally infected with T. cruzi IV (TcIV). Nymphs were fed on infected mice or an artificial feeder with blood containing culture-derived metacyclic trypomastigotes (CMT) or blood trypomastigotes (BT). The intestinal contents (IC) and excreta of the insects were examined by fresh examination and kDNA-PCR. The rate of metacyclogenesis was also determined by differential counts. Fifth instar nymphs fed with CMT ingested a greater blood volume (mean of 74.5 μL) and a greater amount of parasites (mean of 149,000 CMT/μL), and had higher positivity in the fresh examination of the IC. Third instar nymphs fed with CMT had higher positivity (33.3%) in the fresh examination of the excreta. On the 20th day after infection (dai), infective metacyclic trypomastigote (MT) forms were predominant in the excreta of 3/4 experimental groups, and on the 30th dai, the different parasitic forms were observed in the IC of all the groups. Higher percentages of MT were observed in the excreta of the 5th instar nymphs group (84.1%) and in the IC of the 3rd instar nymphs group (80.0%). Rhodnius robustus presented high susceptibility to infection since all nymphs were infected, regardless of the method used for blood meal, in addition these insects demonstrated vector competence for TcIV with high rates of metacyclogenesis being evident.
- Published
- 2022
- Full Text
- View/download PDF
20. USO DE FÁRMACOS PROMOVE AUMENTO NA CESSAÇÃO DO TABAGISMO
- Author
-
Idalina Diair Regla Carolino, Maria Lúcia Dantas, Miyoko Massago, and Celso Ivam Conegero
- Published
- 2019
- Full Text
- View/download PDF
21. Impact of Benznidazole on Infection Course in Mice Experimentally Infected with Trypanosoma cruzi I, II, and IV
- Author
-
Wuelton Marcelo Monteiro, Silvana Marques de Araújo, Edilson Nobuyoshi Kaneshima, Ana Paula Gruendling, Ana Paula Margioto Teston, Maria das Graças V. Barbosa, Miyoko Massago, Max Jean de Ornelas Toledo, and Mônica Lúcia Gomes
- Subjects
Male ,Chagas disease ,Trypanosoma cruzi ,Parasitemia ,Real-Time Polymerase Chain Reaction ,Mice ,Virology ,parasitic diseases ,medicine ,Animals ,Parasite hosting ,Chagas Disease ,Typing ,Infectivity ,biology ,Zoonosis ,Articles ,DNA, Protozoan ,medicine.disease ,biology.organism_classification ,Trypanocidal Agents ,Infectious Diseases ,Nitroimidazoles ,Benznidazole ,Parasitology ,medicine.drug - Abstract
American trypanosomiasis is an emerging zoonosis in the Brazilian Amazon. Studies on benznidazole (BZ) chemotherapy with Trypanosoma cruzi from this region have great relevance, given the different discrete typing units (DTUs) that infect humans in the Amazon and other regions of Brazil. We performed a parasitological, histopathological, and molecular analysis of mice inoculated with strains of T. cruzi I, II, and IV that were BZ-treated during the acute phase of infection. Groups of Swiss mice were inoculated; 13 received oral BZ, whereas the other 13 comprised the untreated controls. Unlike parasitemia, the infectivity and mortality did not vary among the DTUs. Trypanosoma cruzi DNA was detected in all tissues analyzed and the proportion of organs parasitized varied with the parasite DTU. The BZ treatment reduced the most parasitological parameters, tissue parasitism and the inflammatory processes at all infection stages and for all DTUs. However, the number of significant reductions varied according to the DTU and infection phase.
- Published
- 2015
- Full Text
- View/download PDF
22. Efficacy of some essential oils in mice infected with Trypanosoma cruzi
- Author
-
Alexandre Tadachi Morey, Gerson Zanusso Junior, Ana Paula Margioto Teston, Max Jean de Ornelas Toledo, and Miyoko Massago
- Subjects
0301 basic medicine ,Chagas disease ,Traditional medicine ,Inoculation ,030231 tropical medicine ,Pharmaceutical Science ,Parasitemia ,030108 mycology & parasitology ,Biology ,medicine.disease ,biology.organism_classification ,Microbiology ,03 medical and health sciences ,0302 clinical medicine ,Benznidazole ,Syzygium ,Cymbopogon citratus ,parasitic diseases ,medicine ,Pharmacology (medical) ,Zingiber officinale ,Trypanosoma cruzi ,medicine.drug - Abstract
Purpose: To evaluate the efficacy of orally administered Cymbopogon citratus , Zingiber officinale and Syzygium aromaticum essential oils (EOs) in mice infected with Trypanosoma cruzi . Methods: Three experiments were conducted with 48 Swiss mice each. The animals were inoculated with 2 x 10 6 metacyclic trypomastigotes of T. Cruzi Y-strain and allocated into the following groups ( N = 12): 1) untreated control; 2) treated with benznidazole (BZ); 3) treated with EO 100 mg/kg; and 4) treated with EO 250 mg/kg. The groups were evaluated by fresh blood test, blood culture, conventional polymerase chain reaction (PCR), real-time PCR and cure rate (CR). Results: All the animals were completely infected with T. cruzi . Treatment with C. citratus and Z. officinale EOs altered some of the parameters derived from the parasitemia curve, but CRs did not differ from BZ. Treatment with S. Aromaticum EO, on the other hand, not only altered all the parameters derived from the parasitemia curve, similar to BZ, but at the dose of 100 mg/kg, CR was also significantly higher than BZ. Conclusion: The results indicate that the essential oils tested, especially S . aromaticum , exhibited anti- Trypanosoma cruzi effect and therefore should be investigated for the treatment of Chagas disease. Keywords: Chagas disease, Trypanosoma cruzi , Cymbopogon citratus , Zingiber officinale , Syzygium aromaticum , Essential oils, Chemotherapy
- Published
- 2017
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.