21 results on '"Correia AF"'
Search Results
2. 124 Anaesthetic approach in pregnants infected with COVID-19 in a tertiary maternity
- Author
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Correia, AF, primary, Ramos, S, additional, Vilhena, I, additional, Martins, I, additional, Sá, S, additional, Melo, L, additional, and Silva, I, additional
- Published
- 2021
- Full Text
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3. A influência de bactérias patogênicas na transportabilidade do escarro e na qualidade de vida de portadores de bronquiectasia
- Author
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Zanchet, RC, Magalhães, AC, Correia, AF, and Feijó, G
- Subjects
bronquiectasia ,quality of life ,bronchiectasis ,qualidade de vida ,depuração mucociliar ,mucociliary clearance ,sputum ,escarro - Abstract
INTRODUÇÃO: A qualidade de vida pode estar relacionada com o estado clínico do paciente, com o nível de infecção e com o microorganismo que o infecta. OBJETIVO: Analisar o perfil bacteriológico do escarro de pacientes com bronquiectasia e avaliar seu efeito no transporte in vitro e na qualidade de vida dos pacientes. MÉTODOS: Pacientes com bronquiectasia foram avaliados por questionários de qualidade de vida, cultura bacteriana e transporte in vitro do escarro. RESULTADOS: Foram incluídos 19 pacientes com bronquiectasia, com média de idade de 38,6 ± 16 anos. O grupo de portadores de bactérias potencialmente patogênicas, com 10 pacientes (grupo I), foi comparado ao grupo de portadores de bactérias não patogênicas, com 9 pacientes (grupo II). O grupo I teve menor velocidade relativa e maior deslocamento por tosse que o grupo II (p < 0,05). Pelo questionário do Hospital Saint George, na doença respiratória, o grupo I apresentou pior qualidade de vida (domínio impacto) (p < 0,05). Pelo World Health Organization Quality of Life - abreviado, o grupo I também apresentou pior qualidade de vida (domínio físico). Em relação à cor do escarro, quanto mais escuro, menor a velocidade relativa de transporte ciliar (r = -0,646; p = 0,007) e maior o deslocamento por tosse (r = 0,756; p = 0,001). CONCLUSÃO: Pacientes com bronquiectasia portadores de bactérias potencialmente patogênicas no escarro apresentam pior qualidade de vida e pior transporte ciliar no palato de rã, porém têm melhor deslocamento do escarro na máquina de tosse quando comparados àqueles sem bactérias potencialmente patogênicas. INTRODUCTION: Patients' quality of life may be related to their clinical status and level of infection, and to the infecting microorganism. OBJECTIVE: To analyze the bacteriological profile of sputum from patients with bronchiectasis and to determine the effect of such bacteria on in vitro transport and patients' quality of life. METHODS: Patients with bronchiectasis were evaluated by means of quality-of-life questionnaires and sputum bacterial culturing and in vitro transport. RESULTS: Nineteen patients with bronchiectasis (mean age: 38.6 ± 16 years) were included in the study. A group of 10 patients with potentially pathogenic bacteria (group I) was compared with a group of 9 patients with nonpathogenic bacteria (group II). Group I presented lower relative transport velocity and greater displacement per cough maneuver than did group II (p < 0.05). Using the St. George's Hospital respiratory questionnaire, group I presented poorer quality of life in the impact domain (p < 0.05). Using the World Health Organization's Quality-of-Life brief questionnaire, group I also presented poorer quality of life in the physical domain. Regarding sputum color, the darker the sputum was, the lower the relative mucociliary transport velocity was (r = -0.695; p = 0.007) and the greater the displacement per cough maneuver was (r = 0.756; p = 0.001). CONCLUSION: Patients with bronchiectasis and potentially pathogenic bacteria in sputum present poorer quality of life and worse mucociliary transport in the frog palate, but better sputum displacement in the cough mechanism, in comparison with patients without potentially pathogenic bacteria.
- Published
- 2006
4. A influência de bactérias patogênicas na transportabilidade do escarro e na qualidade de vida de portadores de bronquiectasia
- Author
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Zanchet, RC, primary, Magalhães, AC, additional, Correia, AF, additional, and Feijó, G, additional
- Published
- 2006
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5. Circulating Interleukin-22 in Patients with Acute Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention.
- Author
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Correia AF, Oliveira CGC, Oliveira DC Jr, Pereira MC, Carvalho FA, Martins ECC, and Oliveira DC
- Abstract
Acute coronary syndrome (ACS) represents an important clinical manifestation of coronary artery disease (CAD) and is characterized by a particularly poor prognosis. Myocardial reperfusion through primary percutaneous coronary intervention (PPCI) is imperative in the event of acute ST elevation myocardial infarction (STEMI). Interleukin-22 (IL-22) regulates immune and inflammatory responses. This interleukin has been described in the scenario of the CAD, but there are no data in patients with STEMI undergoing PPCI. Objectives : The goals of this study were to investigate the differences in circulating IL-22 levels between patients with STEMI undergoing PPCI and healthy controls and to determine whether these differences were associated with the culprit coronary artery, door-to-balloon time (DBT), final angiographic result, CAD classification, and presence of diabetes mellitus (DM). Methods : A total of 280 participants were recruited, comprising 210 STEMI cases and 70 healthy controls. Participants underwent clinical and angiographic evaluations, and serum IL-22 levels were measured using an enzyme-linked immunosorbent assay (ELISA). Data analysis was performed using the Mann-Whitney and Fisher tests, with p < 0.05 indicating significance. Results : Serum IL-22 levels were lower in cases (149.63, 84.99-294.56) than in the controls (482.67, 344.33-641.00); p < 0.001. Lower IL-22 levels were associated with the right coronary artery (RCA) (144.57, 70.84-242.43; 146.00, 63.60-279.67; 191.71, 121.80-388.97); p = 0.033. IL-22 was lower with shorter DBT (≤60 min, 106.00, 49.60-171.71; >60 min, 153.00, 88.86-313.60); p = 0.043. Conclusions : IL-22 levels were significantly lower in patients with STEMI than in healthy controls.
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- 2024
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6. Production and Chemical Characterization of Silage from Saccharine Sorghum Fertirrigated with Sugarcane Vinasse.
- Author
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Correia AF, Godoy AC, Scardua MP, Oxford JH, de Oliveira PSR, Fukumoto N, and Feiden A
- Abstract
Background: Distillery vinasse is one of the promising bio-fertilizers, as it contains significant amounts of essential chemical elements, allied with sorghum that is widely used in the diet of ruminant animals and has been considered as an alternative to the production of other cereals or forages. This study aimed to evaluate saccharin sorghum silage from fertilization with vinasse., Methods: The research was conducted using the BRS-511, CR-1339, and CR-1342 geno-types. The silage was held for 170 days after sowing, with experimental design in blocks with triple factorial (genotypes x fertilization x inoculation) totaling 54 installments. At 95 days, the silos were opened for sample collection and analysis bromatological analysis., Results: The results indicate the primary source of variation was genotype, characterizing them with different potentials in productivity and better results for BRS-511, CR-1339, and CR-1342. The bromatological results indicate good quality for CR-1339 and CR-1342 hybrids, however, better digestability for BRS-511. There was no observable difference between the factors of fertilization. The inoculation additive assists in the reduction of lignin appears to be high. PCA analysis showed differences between cultivars (BRS-511, CR-1339, and CR-1342) and fertili-zation. However, the PCAs showed the genotypes show similar results with conventional ferti-lization and sugarcane vinasse., Conclusion: The study reflected the possibility of producing sweet sorghum silage with soil sugarcane vinasse fertilization as fertilizer., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2024
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7. Hyperpigmentation induced by ECG electrodes: unexpected finding one year after surgical intervention.
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Correia AF and Silva L
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- Humans, Electrodes, Electrocardiography, Hyperpigmentation etiology
- Published
- 2023
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8. Images that speak: A Portuguese Photovoice study on the psychosocial experience of a migrant population from Cape Verde after a first episode of psychosis.
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Xavier SM, Barbosa S, Correia AF, Dindo V, Sequeira M, Maia T, and Goes AR
- Abstract
Several migrant populations have been identified worldwide as high-risk groups for psychosis because of their experience of social adversity. Recent evidence suggests that the local contexts in which these populations live should be addressed in their complexity to take into account individual and larger societal environmental aspects. This study aimed to assess the lived experiences of a group of migrant Cape Verdean patients, who had been recently hospitalized for a first episode of psychosis in a mental health service on the outskirts of Lisbon, Portugal. The study used Photovoice, a qualitative participatory research method in which people's experiences are documented through photography. Six individuals were recruited, and five weekly sessions were conducted to collect data that were analyzed thematically. Emergent themes addressed two main categories of well-being and illness. Participant concepts of well-being were rooted in a definition of freedom encompassing cultural expression, conveyed by familiar environments and supporting communities. Cultural differences may be experienced as important obstacles for well-being and can be associated with feelings of oppression and guilt. Participants' accounts focused on positive aspects of life despite illness and on personal concepts of recovery. The study findings contribute to knowledge of the dynamics of migrants' social experience and underscore the importance of socially and culturally informed mental healthcare institutions.
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- 2023
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9. Lycorine Alkaloid and Crinum americanum L. (Amaryllidaceae) Extracts Display Antifungal Activity on Clinically Relevant Candida Species.
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Silva LC, Correia AF, Gomes JVD, Romão W, Motta LC, Fagg CW, Magalhães PO, Silveira D, and Fonseca-Bazzo YM
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- Antifungal Agents chemistry, Antifungal Agents pharmacology, Candida, Humans, Phenanthridines, Plant Extracts chemistry, Plant Extracts pharmacology, Alkaloids chemistry, Alkaloids pharmacology, Amaryllidaceae, Amaryllidaceae Alkaloids chemistry, Amaryllidaceae Alkaloids pharmacology, Crinum chemistry
- Abstract
Candida species are the main fungal agents causing infectious conditions in hospital patients. The development of new drugs with antifungal potential, increased efficacy, and reduced toxicity is essential to face the challenge of fungal resistance to standard treatments. The aim of this study is to evaluate the in vitro antifungal effects of two crude extracts of Crinum americanum L., a rich alkaloid fraction and lycorine alkaloid, on the Candida species. As such, we used a disk diffusion susceptibility test, determined the minimum inhibitory concentration (MIC), and characterized the components of the extracts using Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (ESI FT-ICR MS). The extracts were found to have antifungal activity against various Candida species. The chemical characterization of the extracts indicated the presence of alkaloids such as lycorine and crinine. The Amaryllidaceae family has a promising antifungal potential. Furthermore, it was found that the alkaloid lycorine directly contributes to the effects that were observed for the extracts and fraction of C. americanum .
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- 2022
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10. Faster Cryptococcus Melanization Increases Virulence in Experimental and Human Cryptococcosis.
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de Sousa HR, de Oliveira GP Jr, Frazão SO, Gorgonha KCM, Rosa CP, Garcez EM, Lucas J Jr, Correia AF, de Freitas WF, Borges HM, Brito Alves LG, Paes HC, Trilles L, Lazera MDS, Teixeira MM, Pinto VL Jr, Felipe MSS, Casadevall A, Silva-Pereira I, Albuquerque P, and Nicola AM
- Abstract
Cryptococcus spp. are human pathogens that cause 181,000 deaths per year. In this work, we systematically investigated the virulence attributes of Cryptococcus spp. clinical isolates and correlated them with patient data to better understand cryptococcosis. We collected 66 C. neoformans and 19 C. gattii clinical isolates and analyzed multiple virulence phenotypes and host-pathogen interaction outcomes. C. neoformans isolates tended to melanize faster and more intensely and produce thinner capsules in comparison with C. gattii . We also observed correlations that match previous studies, such as that between secreted laccase and disease outcome in patients. We measured Cryptococcus colony melanization kinetics, which followed a sigmoidal curve for most isolates, and showed that faster melanization correlated positively with LC3-associated phagocytosis evasion, virulence in Galleria mellonella and worse prognosis in humans. These results suggest that the speed of melanization, more than the total amount of melanin Cryptococcus spp. produces, is crucial for virulence.
- Published
- 2022
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11. Inhibitory effects of Lactobacillus casei Shirota against both Candida auris and Candida spp. isolates that cause vulvovaginal candidiasis and are resistant to antifungals.
- Author
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Paniágua AL, Correia AF, Pereira LC, de Alencar BM, Silva FBA, Almeida RM, and de Medeiros Nóbrega YK
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- Biofilms, Brazil, Candida albicans drug effects, Candida auris drug effects, Female, Humans, Antifungal Agents pharmacology, Candida drug effects, Candidiasis, Vulvovaginal drug therapy, Lactic Acid pharmacology, Lacticaseibacillus casei
- Abstract
Background: Vulvovaginal candidiasis (VVC), the second leading cause of genital infection in women of reproductive age, is caused by yeasts of the genus Candida. Treatment is usually empirical and performed with azoles, which have shown increasing ineffectiveness due to resistance from these species. This therapeutic challenge has led to the search for new treatment strategies. Lactobacillus spp. produce several components with microbicidal effects, such as lactic acid. These species are the main components of a healthy vaginal microbiota and have been used as probiotics. The aim of this work was to investigate the in vitro inhibitory effects of Lactobacillus casei Shirota on both the Candida spp. that cause VVC and on C. auris., Methods: The microbicidal effects of L. casei Shirota on the main VVC-causing species, C. albicans, C. tropicalis, C. norvegensis and C. parapsilosis, in addition to C. auris were investigated by counting the Colony-forming Units (CFUs) after cocultivation. The antifungal activity of lactic acid against these Candida strains was assessed using the microtiter broth dilution method to determine the minimum inhibitory concentrations (MICs). The effects of L. casei Shirota on hyphal and early biofilm formation was measured by optical microscopy., Results: L. casei Shirota showed inhibitory action against all tested Candida spp., ranging from 66.9 to 95.6% inhibition depending on the species. This inhibition is possibly related to the production of lactic acid, since lactic acid has shown microbicidal action against these same Candida spp. at a concentration of 5 mg/mL, which corresponds to half of the normal physiological concentration. In addition, L. casei Shirota was able to reduce the formation of C. albicans hyphae and early biofilms, showing strong anti-Candida effects., Conclusions: These results suggest that L. casei Shirota has antifungal activity against the Candida species that cause VVC. L. casei also has microbicidal action against C. auris., (© 2021. The Author(s).)
- Published
- 2021
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12. Vulvovaginal candidiasis and current perspectives: new risk factors and laboratory diagnosis by using MALDI TOF for identifying species in primary infection and recurrence.
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Pereira LC, Correia AF, da Silva ZDL, de Resende CN, Brandão F, Almeida RM, and de Medeiros Nóbrega YK
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- Adult, Candida classification, Female, Humans, Middle Aged, Recurrence, Risk Factors, Young Adult, Candida isolation & purification, Candidiasis, Vulvovaginal microbiology, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization methods
- Abstract
Vulvovaginal candidiasis (VVC), considered the second cause of genital infection among women, has pathogenic mechanisms still to be elucidated and unknown risk factors. Prevalence studies with laboratory diagnosis (at first diagnosis and recurrence) are uncommon, especially using MALDI TOF, used in this clinical, epidemiological, and laboratory study for evaluating candidiasis, and identifying unknown risk factors. To obtain clinical and epidemiological data, patients were questioned, and there was material collection. Samples collected were identified by using phenotypic and presumptive methods and confirmed by MALDI TOF. This study analyzed 278 patients, divided into symptomatic (n = 173) and asymptomatic (n = 105) groups. Regarding the main candidiasis symptoms (discharge, itching, and burning), only 50.3% of patients described these concomitant symptoms, showing a positive predictive value of 67.8%. Regarding the risk factors investigated, there was a statistical correlation between candidiasis and dairy products, gut transit, contraceptive use, respiratory allergy, and panty liners, describing new risk factors related to intestinal and vaginal dysbiosis. After Candida species analysis and confirmation, the primary prevalence was 80.9% (Candida albicans), 15.2% (non-albicans), 1% (Rhodotorula mucilaginosa), and 1.9% (unidentified species). In recurrence, the prevalence was 66.7% (C. albicans) and 33.3% (non-albicans). The presence of symptoms has low positive predictive value for the diagnosis of candidiasis, even when considering the classic triad of symptoms. Laboratory identification of yeast species is essential for correct treatment, preventing the resistance to antifungals and the high recurrence. In addition, dairy products and bowel habits, both related to intestinal and vaginal dysbiosis, may be associated with VVC., (© 2021. The Author(s).)
- Published
- 2021
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13. Short and long-term effects of water-based aerobic and concurrent training on cardiorespiratory capacity and strength of older women.
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Reichert T, Costa RR, Preissler AAB, Oliveira HB, Bracht CG, Barroso BM, de Mello Bones da Rocha V, Correia AF, and Kruel LFM
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- Aged, Exercise Test, Female, Humans, Muscle Strength, Oxygen Consumption, Resistance Training, Water
- Abstract
Studies show that, in the short term, water-based aerobic training (WAT) promotes the same strength gains as water-based concurrent training (WCT). In addition, it is known that some training progression strategy must be employed after the first weeks of training in order to continue stimulating neuromuscular gains. The aim of this paper was to compare the effects of three water-based training on cardiorespiratory capacity and strength of older women in short and long-terms. Fifty-seven participants were randomized into the groups: 1) aerobic training (AT); 2) concurrent training whose resistance training progressed to the use of resistive equipment (CTRE); and 3) concurrent training whose resistance training progressed to multiple sets (CTMS). Participants trained twice a week for 16 weeks. An incremental treadmill test and the one-repetition maximal test of knee extensors were performed before and after 8 and 16 weeks. Peak oxygen consumption showed similar increases from pre to post-16 weeks (AT: 9%, CTRE: 11%, CTMS: 5%). Oxygen consumption at the second ventilatory threshold and strength were increased from pre to post-8 weeks (AT: 15%, CTRE: 16%, CTMS: 3% and AT: 9%, CTRE: 5%, CTMS: 9%, respectively) and from post-8 to post-16 weeks (AT: 6%, CTRE: 3%, CTMS: 12% and AT: 4%, CTRE: 8%, CTMS: 4%, respectively). In conclusion, the three training programs promoted similar increases in the cardiorespiratory capacity and WAT promoted similar strength gains as WCT in short and long terms. Moreover, the use of resistive equipment and the increase in the number of sets are effective progression strategies., (Copyright © 2020 Elsevier Inc. All rights reserved.)
- Published
- 2020
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14. Coronary Artery Thromboses, Stent Thrombosis and Antiphospholipid Antibody Syndrome: Case Report.
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Correia AF, Oliveira DC, and Sanctos M
- Abstract
The antiphospholipid antibody syndrome (APS) is defined by a state of hypercoagulability secondary to an autoimmune disorder. There are evidences that approximately 2.8-5.5% of cases of acute myocardial infarction (AMI) in young individuals are secondary to APS. In this case report, three coronary artery thromboses occurring within a short period are described. Initially, there was an ST-segment elevation (STEMI) in the presence of coronary artery disease (CAD), with the vessel being treated with stent implantation. Thereafter, a subacute stent thrombosis occurred (high thrombotic load in almost all coronary arteries), which was treated with implantation of two stents. Subsequently, there was a new infarction owing to a new thrombosis in the native coronary artery. The treatment of APS in patients who developed thrombotic events is full anticoagulation from the initial stages maintained throughout life. The standard anticoagulant therapy is administration of vitamin K antagonists, such as warfarin.
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- 2018
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15. The in vivo performance of an alkali-free bioactive glass for bone grafting, FastOs ® BG, assessed with an ovine model.
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Cortez PP, Brito AF, Kapoor S, Correia AF, Atayde LM, Dias-Pereira P, Maurício AC, Afonso A, Goel A, and Ferreira JM
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- Animals, Sheep, Bone Substitutes chemistry, Bone Substitutes pharmacology, Ceramics chemistry, Ceramics pharmacology, Femur metabolism, Femur pathology, Materials Testing
- Abstract
Although bioactive glasses are successfully used as bone substitutes, recent studies have revealed that the high alkali content in these glasses leads to fast in vivo degradation rates that may not match the rate of new bone ingrowth. This prompted us to design and develop novel bioactive glasses that are devoid of alkali but still demonstrate high bioactivity in vitro. This article describes the in vivo performance of an alkali-free bioactive glass with the following composition (Wt %): 13.03 MgO-33.98 CaO-13.37 P
2 O5 -38.84 SiO2 -0.77 CaF2 (labelled as FastOs® BG). An animal model was used to assess the in vivo performance of FastOs® BG, using 45S5 Bioglass® as control. The evaluation was performed through implantation of FastOs® BG and 45S5 Bioglass® , during one month, in femoral bone defects in sheep. Subcutaneous implantation of both glasses was also performed in order to assess tissue response through a standardized method. Histological and scanning electron microscopy assessment of retrieved subcutaneous and bone samples demonstrated that FastOs® BG is biocompatible, osteoconductive, that it can be osteointegrated, and that it is more slowly resorbed than 45S5 Bioglass® . These features suggest that FastOs® BG is a potential candidate for bone grafting. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 30-38, 2017., (© 2015 Wiley Periodicals, Inc.)- Published
- 2017
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16. Activity of crude extracts from Brazilian cerrado plants against clinically relevant Candida species.
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Correia AF, Silveira D, Fonseca-Bazzo YM, Magalhães PO, Fagg CW, da Silva EC, Gomes SM, Gandolfi L, Pratesi R, and de Medeiros Nóbrega YK
- Subjects
- Antifungal Agents chemistry, Brazil, Microbial Sensitivity Tests, Plant Extracts chemistry, Antifungal Agents pharmacology, Candida drug effects, Eugenia chemistry, Plant Extracts pharmacology, Plants, Medicinal chemistry, Pouteria chemistry
- Abstract
Background: Medicinal plants have traditionally been used in many parts of the world as alternative medicine. Many extracts and essential oils isolated from plants have disclosed biological activity, justifying the investigation of their potential antimicrobial activity. In this study, the in vitro antifungal activity of six Brazilian Cerrado medicinal plant species were evaluated against clinically relevant Candida species., Methods: The crude extract plants were evaluated against American Type Culture Collection (ATCC) standard strains of Candida spp. using disk diffusion method and determining the minimum inhibitory concentration (MIC). The chemical study results were confirmed by HPLC method., Results: All six plant species showed antifungal activity. Among the species studied, Eugenia dysenterica and Pouteria ramiflora showed significant inhibitory activity against C. tropicalis at lowest MIC value of 125 and 500 μg/disc, respectively. The Eugenia dysenterica also disclosed MIC value of 125 μg/disc against C. famata, 250 μg/disc against C. krusei and 500 μg/disc against C. guilliermondii and C. parapsilosis. Pouteria torta, Bauhinia rufa, Erythroxylum daphnites and Erythroxylum subrotundum showed activity against the yeast strains with MIC value of 1000 μg/disc. The chemical study of the most bioactive extracts of Eugenia dysenterica and Pouteria ramiflora revealed catechin derivatives and flavonoids as main components., Conclusions: All six evaluated plant species showed good antifungal potential against several Candida strains. However, E .dysenterica and P. ramiflora showed the higher inhibitory effect against the non-albicans Candida species. Our results may contribute to the continuing search of new natural occurring products with antifungal activity.
- Published
- 2016
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17. Influence of ZnO/MgO substitution on sintering, crystallisation, and bio-activity of alkali-free glass-ceramics.
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Kapoor S, Goel A, Correia AF, Pascual MJ, Lee HY, Kim HW, and Ferreira JM
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- Animals, Cell Proliferation drug effects, Cells, Cultured, Ceramics pharmacology, Crystallization, Hot Temperature, Magnesium Oxide pharmacology, Mesenchymal Stem Cells, Rats, Zinc Oxide pharmacology, Ceramics chemistry, Magnesium Oxide chemistry, Zinc Oxide chemistry
- Abstract
The present study reports on the influence of partial replacement of MgO by ZnO on the structure, crystallisation behaviour and bioactivity of alkali-free bioactive glass-ceramics (GCs). A series of glass compositions (mol%): 36.07 CaO-(19.24-x) MgO-x ZnO-5.61 P2O5-38.49 SiO2-0.59 CaF2 (x=2-10) have been synthesised by melt-quench technique. The structural changes were investigated by solid-state magic angle spinning nuclear magnetic resonance (MAS-NMR), X-ray diffraction and differential thermal analysis. The sintering and crystallisation behaviours of glass powders were studied by hot-stage microscopy and differential thermal analysis, respectively. All the glass compositions exhibited good densification ability resulting in well sintered and mechanically strong GCs. The crystallisation and mechanical behaviour were studied under non-isothermal heating conditions at 850 °C for 1h. Diopside was the primary crystalline phase in all the GCs followed by fluorapatite and rankinite as secondary phases. Another phase named petedunnite was identified in GCs with ZnO content >4 mol. The proliferation of mesenchymal stem cells (MSCs) and their alkaline phosphatase activity (ALP) on GCs was revealed to be Zn-dose dependent with the highest performance being observed for 4 mol% ZnO., (Copyright © 2015 Elsevier B.V. All rights reserved.)
- Published
- 2015
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18. Effect of Temperature, Time, and Material Thickness on the Dehydration Process of Tomato.
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Correia AF, Loro AC, Zanatta S, Spoto MH, and Vieira TM
- Abstract
This study aimed to evaluate the effects of temperature, time, and thickness of tomatoes fruits during adiabatic drying process. Dehydration, a simple and inexpensive process compared to other conservation methods, is widely used in the food industry in order to ensure a long shelf life for the product due to the low water activity. This study aimed to obtain the best processing conditions to avoid losses and keep product quality. Factorial design and surface response methodology were applied to fit predictive mathematical models. In the dehydration of tomatoes through the adiabatic process, temperature, time, and sample thickness, which greatly contribute to the physicochemical and sensory characteristics of the final product, were evaluated. The optimum drying conditions were 60°C with the lowest thickness level and shorter time.
- Published
- 2015
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19. Predictors of Virologic Failure in HIV/AIDS Patients Treated with Highly Active Antiretroviral Therapy in Brasília, Brazil During 2002-2008.
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Bello EJ, Correia AF, Marins JR, Merchan-Hamann E, and Kanzaki LI
- Abstract
Little data exists concerning the efficacy of the antiretroviral therapy in the Federal District in Brazil, therefore in order to improve HIV/AIDS patients' therapy and to pinpoint hot spots in the treatment, this research work was conducted. Of 139 HIV/AIDS patients submitted to the highly active antiretroviral therapy, 12.2% failed virologically. The significant associated factors related to unresponsiveness to the lentiviral treatment were: patients' place of origin (OR = 3.28; IC95% = 1.0-9.73; P = 0.032) and Mycobacterium tuberculosis infection (RR = 2.90; IC95% = 1.19-7.02; P = 0.019). In the logistic regression analysis, the remaining variables in the model were: patients' birthplace (OR = 3.28; IC95% = 1.10-9.73; P = 0.032) and tuberculosis comorbidity (OR = 3.82; IC95% = 1.19-12.22; P = 0.024). The patients enrolled in this survey had an 88.0% therapeutic success rate for the maximum period of one year of treatment, predicting that T CD4(+) low values and elevated viral loads at pretreatment should be particularly considered in tuberculosis coinfection, besides the availability of new antiretroviral drugs displaying optimal activity both in viral suppression and immunological reconstitution.
- Published
- 2011
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20. Amazonian plant crude extract screening for activity against multidrug-resistant bacteria.
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Correia AF, Segovia JF, Gonçalves MC, de Oliveira VL, Silveira D, Carvalho JC, and Kanzaki LI
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- Brazil, Drug Resistance, Multiple, Bacterial, Microbial Sensitivity Tests, Anti-Bacterial Agents pharmacology, Bacteria drug effects, Plant Extracts pharmacology
- Abstract
Antimicrobial resistance is a subject of great concern in public health and also in the designing of strategies for current therapeutic protocols all over the world. New drugs, including those necessary for a reserve armamentarium and exhibiting less side effects deserve special attention. In rural areas, particularly in Brazil, a huge number of natural products, in different artisanal preparations, mainly from plants, have been used by traditional populations to cure diseases. Despite some of these plants have been studied, many of them are awaiting to have their compounds chemically characterized and investigated their pharmacodynamics properties. Further, as well known, the environment plays a crucial role in the metabolism of these plants, yielding different and varied molecular complexes depending on the period of collection, climate conditions, kind of soil and also the plant speciation. In this report, ethanol crude extract of 10 different botanical specimens from the Amazon region of Brazil, in the Amapa State, were screened for antibacterial activity of 7 clinical resistant microorganisms utilizing as control ATCC bacterial species by the Kirby-Bauer method. Plant extracts of Geissospermum argenteum, Uncaria guianensis, Brosimum acutifolium, Copaifera reticulate, Licania macrophylla, Ptycopetalum olacoides and Dalbergia subcymosa yielded activity against Staphylococcus aureus and Pseudomonas aeruginosa, both multidrug resistant, and Staphylococcus aureus ATCC strain.
- Published
- 2008
21. [Prevalence and bacterial susceptibility of community acquired urinary tract infection in University Hospital of Brasília, 2001 to 2005].
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Pires MC, Frota Kde S, Martins Junior Pde O, Correia AF, Cortez-Escalante JJ, and Silveira CA
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- Anti-Bacterial Agents therapeutic use, Brazil epidemiology, Community-Acquired Infections drug therapy, Community-Acquired Infections epidemiology, Community-Acquired Infections microbiology, Humans, Microbial Sensitivity Tests, Prevalence, Urinary Tract Infections drug therapy, Urinary Tract Infections microbiology, Anti-Bacterial Agents pharmacology, Gram-Negative Bacteria drug effects, Gram-Positive Bacteria drug effects, Urinary Tract Infections epidemiology
- Abstract
Urinary tract infection is among the most common infectious diseases in clinical medicine, and knowledge of its epidemiology and the sensitivity profile of the etiological agents is mandatory. The aim of this study was to identify the most frequent etiological agents and the profile of sensitivity to antimicrobial agents of the bacteria isolated from urine cultures from outpatients at the University Hospital of Brasília between 2001 and 2005. From analyses at the hospitals microbiology laboratory, there were 2,433 positive urine cultures. Escherichia coli was the most commonly isolated bacteria (62.4%), followed by Klebsiella pneumoniae (6.8%) and Proteus mirabilis (4.7%). Escherichia coli showed the highest sensitivity to amikacin (98.6%), gentamicin (96.2%), nitrofurantoin (96.3%) and the quinolones ciprofloxacin (90.9%) and norfloxacin (89.8%), with low sensitivity to sulfamethoxazole-trimethoprim (50.6%). The others bacteria presented similar sensitivity profiles. In conclusion, Escherichia coli was the most commonly isolated bacteria, and it was highly sensitive to aminoglycosides, nitrofurantoin and quinolones.
- Published
- 2007
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