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au:OLIVEIRA, JULIA S.

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Inoculation methods of Azospirillum brasilense in lettuce and arugula in the hydroponic system
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Oliveira, Carlos E. da S.

; Gato, Isabela M. B.

; Moreira, Vitoria de A.

; Jalal, Arshad

; Oliveira, Thaissa J. S. S.

; Oliveira, Julia R.

; Fernandes, Guilherme C.

; Teixeira Filho, Marcelo C. M.

Revista Brasileira de Engenharia Agrícola e Ambiental

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Set 2023, Volume 27 Nº 9 Páginas 653 - 662

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

ABSTRACT: Lettuce and arugula are the most cultivated leafy vegetables in hydroponic systems in the world, and the little information about Azospirillum brasilense effects in research in this system makes it necessary to verify the best method of inoculation of these bacteria. Therefore, this study aimed to verify the beneficial effects of inoculation methods of A. brasilense on plant growth and nutrition of lettuce and arugula grown in the hydroponic system. The study was conducted in a greenhouse with 30% shading. A randomized block design with five replicates in a 4 × 2 factorial scheme was used. Four A. brasilense inoculation methods (non-inoculated, foliar application, nutrient solution, and nutrient solution + foliar application) and two leafy vegetable species - arugula and lettuce - were evaluated. All inoculation methods improved plant height, shoot fresh and dry mass, root fresh and dry mass, fresh leaf yield, leaf chlorophyll index, accumulation of nitrogen, potassium, calcium, sulfur, phosphorus, iron, manganese, and copper and reduced nitrate accumulation in shoot and root of arugula and lettuce. Inoculation via nutrient solution + foliar application of A. brasilense is the most suitable for hydroponic arugula cultivation because it provides greater fresh leaf yield. All inoculation methods increased leaf yield in hydroponic lettuce. Hydroponic arugula and lettuce plants showed greater accumulation of nutrients and plant growth with less nitrate accumulation in the shoot under inoculation with A. brasilense.

RESUMO A alface e a rúcula são as hortaliças folhosas mais cultivadas em sistemas hidropônicos no mundo, e as poucas informações sobre os efeitos do Azospirillum brasilense em pesquisas neste sistema torna-se necessário verificar o melhor método de inoculação dessas bactérias. Portanto, o objetivo deste estudo foi verificar os efeitos benéficos de métodos de inoculação de A. brasilense em alface e rúcula no crescimento e nutrição das plantas em sistema hidropônico. O estudo foi conduzido em casa de vegetação com 30% de sombreamento. Foi usado o delineamento em blocos ao acaso com 5 repetições em esquema fatorial 4 × 2, com quatro métodos de inoculação de A. brasilense (não inoculado, foliar, solução nutritiva e solução nutritiva + inoculação foliar) e o segundo fator foi a aplicação em rúcula e alface. Todos os métodos de inoculação melhoraram a altura da planta, massa fresca e seca da parte aérea, massa fresca e seca da raiz, rendimento da planta, índice de clorofila foliar, acúmulo de nitrogênio, potássio, cálcio, enxofre, fósforo, ferro, manganês, cobre e redução do acúmulo de nitrato na parte aérea e raízes de rúcula e alface. A inoculação via solução nutriente + inoculação foliar de A. brasilense é a mais indicada para o cultivo hidropônico de rúcula, pois proporciona maior rendimento de folhas, e todos os métodos de inoculação foram capazes de aumentar o rendimento de folhas em alface hidropônica. Plantas hidropônicas de rúcula e alface apresentaram maior acúmulo de nutrientes e crescimento das plantas com menor acúmulo de nitrato na parte aérea sob inoculação com A. brasilense.

https://doi.org/10.1590/1807-1929/agriambi.v27n9p653-662

Gene-environment interactions and preterm birth predictors: A Bayesian network approach
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Elias, Dario E.

; Santos, Maria R.

; Campaña, Hebe

; Poletta, Fernando A.

; Heisecke, Silvina L.

; Gili, Juan A.

; Ratowiecki, Julia

; Cosentino, Viviana R.

; Uranga, Rocio

; Málaga, Diana Rojas

; Oliveira Netto, Alice Brinckmann

; Brusius-Facchin, Ana Carolina

; Saleme, César

; Rittler, Mónica

; Krupitzki, Hugo B.

; Camelo, Jorge S. Lopez

; Gimenez, Lucas G.

Genetics and Molecular Biology

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2023, Volume 46 Nº 4 elocation e20230090

Resumo: En | Texto: En | PDF: En

Abstract Preterm birth (PTB) is the main condition related to perinatal morbimortality worldwide. The aim of this study was to identify gene-environment interactions associated with spontaneous PTB or its predictors. We carried out a retrospective case-control study including parental sociodemographic and obstetric data as well as newborn genetic variants of 69 preterm and 61 at term newborns born at a maternity hospital from Tucumán, Argentina, between 2005 and 2010. A data-driven Bayesian network including the main PTB predictors was created where we identified gene-environment interactions. We used logistic regressions to calculate the odds ratios and confidence intervals of the interactions. From the main PTB predictors (nine exposures and six genetic variants) we identified an interaction between low neighbourhood socioeconomic status and rs2074351 (PON1, genotype GG) variant that was associated with an increased risk of toxoplasmosis (odds ratio 12.51, confidence interval 95%: 1.71 - 91.36). The results of this exploratory study suggest that structural social disparities could influence the PTB risk by increasing the frequency of exposures that potentiate the risk associated with individual characteristics such as genetic traits. Future studies with larger sample sizes are necessary to confirm these findings.

https://doi.org/10.1590/1678-4685-gmb-2023-0090

Neonatal screening for spinal muscular atrophy: A pilot study in Brazil
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Oliveira Netto, Alice Brinckmann

; Brusius-Facchin, Ana Carolina

; Lemos, Júlia F.

; Pasetto, Fernanda B.

; Brasil, Carolina S.

; Trapp, Franciele B.

; Saute, Jonas Alex Morales

; Donis, Karina Carvalho

; Becker, Michele Michelin

; Wiest, Paloma

; Coutinho, Vivian L. S.

; Castro, Simone

; Ferreira, Juliana

; Silveira, Cynthia

; Bittar, Maria Fernanda R.

; Wang, Cristina

; Lana, Janaina M.

; França Junior, Marcondes Cavalcante

; Giugliani, Roberto

Genetics and Molecular Biology

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2023, Volume 46 Nº 3 elocation e20230126

Resumo: En | Texto: En | PDF: En

Abstract Spinal muscular atrophy (SMA) is considered one of the most common autosomal recessive disorders, with an estimated incidence of 1 in 10,000 live births. Testing for SMA has been recommended for inclusion in neonatal screening (NBS) panels since there are several therapies available and there is evidence of greater efficacy when introduced in the pre/early symptomatic phases. In Brazil, the National Neonatal Screening Program tests for six diseases, with a new law issued in 2021 stating that it should incorporate more diseases, including SMA. In the present study, dried blood spot (DBS) samples collected by the Reference Services of Neonatal Screening of RS and SP, to perform the conventional test were also screened for SMA, using real-time PCR, with SALSA MC002 technique. A total of 40,000 samples were analyzed, enabling the identification of four positive cases of SMA, that were confirmed by MLPA. Considering our sampling, Brazil seems to have an incidence comparable to the described in other regions. This work demonstrated that the use of the MC002 technique in samples routinely collected for the conventional NBS program is suitable to screen for SMA in our conditions and can be included in the expansion of the neonatal screening programs.

https://doi.org/10.1590/1678-4685-gmb-2023-0126

Severe form of lymphocutaneous sporotrichosis: a case report
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Martins, Ezequias Batista

; Durães, Sandra Maria Barbosa

; Teixeira, Julia de Abreu

; Vilte, Remberto Maurício de La Cruz Vargas

; Klitzke, Aline Schultz

; Santos, Thainá Busque dos

; Ronchini, Karla Regina Oliveira de Moura

; Ferreira, Laura da Cunha

; Silva, Natália Chilinque Zambão da

; Martins, Ianick Souto

; McBenedict, Billy

; Machado, Carolina Romero Cardoso

; Pinheiro, Patrícia Yvonne Maciel

Revista do Instituto de Medicina Tropical de São Paulo

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2023, Volume 65 elocation e41

Resumo: En | Texto: En | PDF: En

ABSTRACT Sporotrichosis is the most frequent subcutaneous mycosis in Latin America. It is caused by species of the genus Sporothrix. Infection in humans occurs through the entry of the fungus into the skin. Zoonotic outbreaks involving cats in the transmission of the disease have been frequently reported. The lymphocutaneous form is the most commonly observed and the upper limbs are the most affected sites. We report a case of a 64-year-old healthy female patient with a lymphocutaneous form with rapid progression of lesions, which was refractory to initial treatment with itraconazole. Treatment with liposomal amphotericin B was performed with a satisfactory resolution, but aesthetic and functional sequelae in the left upper limb were installed.

https://doi.org/10.1590/s1678-9946202365041

Vascular retinal findings after COVID-19 vaccination in 11 cases: a coincidence or consequence?
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Silva, Letícia S. C. da

; Finamor, Luciana P. S.

; Andrade, Gabriel C.

; Lima, Luiz H.

; Zett, Claudio

; Muccioli, Cristina

; Sarraf, Eduardo P.

; Marinho, Paula M.

; Peruchi, Julia

; Oliveira, Raiza D. de L.

; Giralt, Lena

; Charcan, Ivonne

; Fonollosa, Alex

; Diaz, Jose D.

; Davis, Janet L.

; Nascimento, Heloisa

; Belfort Jr, Rubens

Arquivos Brasileiros de Oftalmologia

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Abr 2022, Volume 85 Nº 2 Páginas 158 - 165

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Objetivos: o principal objetivo deste estudo foi descrever pacientes com achados vasculares retinianos temporalmente relacionados à vacinação contra COVID-19. Com maior notificação de possíveis eventos adversos similares, esperamos compreender a real dimensão e relevância do que foi apresentado. Métodos: Onze pacientes com queixas visuais após vacinação contra COVID-19 foram estudados. Os dados analisados foram: idade, gênero, tipo de vacinação, tempo de aparecimento de sintomas, achados sistêmicos, antecedentes pessoais, acuidade visual com melhor correção, biomicroscopia e imagem retiniana multimodal (retinografia colorida, red-free, SD-OCT, OCTA e angiofluoresceinografia). Os critérios de inclusão foram a presença de alterações oftalmológicas ocorridas dentro de 30 dias após a primeira ou segunda dose de qualquer vacina contra COVID-19. Resultados: Onze pacientes foram incluídos: 5 com oclusão arterial (45,4%), 4 com oclusão venosa (36,4%) e 2 (18,2%) com alterações não específicas vasculares sugestivas de isquemia retiniana como exsudatos algodonosos. A idade média dos pacientes foi de 57 anos (DP=16; com intervalo de 27 a 84 anos). A média de tempo de aparecimento de sintomas após a vacinação foi de 10 dias (DP=5,4; com intervalo de 3 a 16 dias). Nove dos onze pacientes eram do sexo feminino (81,8%). Fatores de risco sistêmicos foram observados em 36,4% dos pacientes. Dois pacientes tiveram sintomas neurológicos e visuais, com oclusão arterial. 36,4% dos pacientes tiveram infecção prévia por COVID-19 no último ano. Sete pacientes (63,6%) receberam a vacina ChAdOx1 nCoV-19 (AZD1222). Conclusões: nossos dados sugerem que eventos retinianos temporalmente relacionados à vacinação contra COVID-19 são possíveis, porém raros. A relação entre estes eventos pós-vacinais exigem futura atenção antes de maiores conclusões.

ABSTRACT Purpose: The primary purpose of this study was to assess vascular retinal findings temporally related to COVID-19 vaccination. With greater information regarding all possible future adverse events, we hope to understand the real dimension and relevance of what was presented. Methods: Eleven patients with visual complaints after COVID-19 vaccination were enrolled. Data on the following were included: age, sex, vaccine, time of symptom onset, systemic findings, medical history, best-corrected visual acuity, and ocular findings by slit-lamp biomicroscopy as well as multimodal retinal imaging (color fundus, red-free photography, spectral-domain optical coherence tomography, optical coherence tomography angiography, and fluorescein-angiography). Inclusion criteria were the presence of ophthalmologic signs within 30 days after the first or second dose of any COVID-19 vaccine. Results: Of 11 patients, five had arterial occlusion (45.4%), four had venous occlusion (36.4%), and two (18.2%) had nonspecific vascular alterations suggestive of retinal ischemia such as cotton-wool spots. The mean age was 57 (SD = 16; range: 27-84) years. The mean time of symptoms onset was 10 (SD = 5.4; range: 3-16) days. Nine patients were female (81.8%). Systemic risk factors were observed in 36.4% of patients. Two patients had both neurological and visual symptoms, with arterial occlusion. Overall, 36.4% patients had COVID-19 in the previous year. Seven patients (63.6%) received ChAdOx1 nCoV-19 (AZD1222) vaccine. Conclusions: Our data suggest that retinal events temporally related to COVID-19 vaccination are possible but are very rare. The relationship of these events with post-COVID-19 vaccination warrants further attention to derive a meaningful conclusion.

https://doi.org/10.5935/0004-2749.20220071

Art and science: impact of semioccluded vocal tract exercises and choral singing on quality of life in subjects with congenital GH deficiency
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Andrade, Bruna M. R. de

; Valença, Eugenia H. O.

; Salvatori, Roberto

; Oliveira Neto, Luiz A.

; Souza, Anita H. O.

; Oliveira, Alaíde H. A.

; Oliveira, Mario C.P.

; Melo, Enaldo V.

; Carvalho, Susana de

; Sales, Neuza J

; Monteiro, Gisane C.

; Lima, José Marcel de

; Annunziato, Marcos Felipe Harder

; Mannis, Guilherme Daniel Breternitz

; Souza, Lucas E. de A.

; Goes, Yasmin D.

; Carvalho, Thayza S.

; Farias, Celiane de

; Santos, Michela P. dos

; Cardoso, Gabriela P. F.

; Sousa, Carla S. Pereira

; Santana, Julia Rodrigues

; Sales, Ester Almeida

; d’Avila, Jeferson Sampaio

; Aguiar-Oliveira, Manuel H.

Archives of Endocrinology and Metabolism

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Abr 2022, Volume 66 Nº 2 Páginas 198 - 205

Resumo: En | Texto: En | PDF: En

ABSTRACT Objectives: Currently, not much is known about the interactions between voice and growth hormone (GH). We have described large kindred with isolated GH deficiency (IGHD) due to a GHRH receptor mutation, resulting in severe short stature and high-pitched voice. These IGHD individuals have little interest in GH treatment, as they consider themselves “short long-lived people”, rather than patients. Interestingly, they report normal general quality of life, but they rate their Voice-Related Quality of Life (V-RQOL) as low. Here, we assessed the social and auditory-perceptual impacts of artistic-intervention voice therapy with semioccluded vocal tract exercises (SOVTE) and choral singing, on their voices. Material and methods: Seventeen GH-naïve adult IGHD individuals were enrolled in a single-arm interventional pre-post study with 13 weekly sessions of choir singing over 90 days. Outcome measures were V-RQOL scores, self-assessment of voice, and auditory-perceptual analysis (GRBAS scale, G: grade of the severity of dysphonia; R: roughness; B: breathiness; A: asthenia; and S: strain). Results: Marked improvements in total (p = 0.0001), physical (p = 0.0002), and socioemotional (p = 0.0001) V-RQOL scores and in self-assessment of voice (p = 0.004) were found. The general grades of vocal deviation (p = 0.0001), roughness (p = 0.0001), breathiness (p = 0.0001) and strain (p = 0.0001) exhibited accentuated reductions. Conclusions: Voice therapy with semioccluded vocal tract exercises and choral training improved social impact and perceptual voice assessments in IGHD subjects and markedly improved their voice-related quality of life. This is particularly important in a setting where GH replacement therapy is not widely accepted.

https://doi.org/10.20945/2359-3997000000449

Recovery of β-galactosidase produced by Kluyveromyces lactis by ion-exchange chromatography: Influence of pH and ionic strength parameters
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CARVALHO, CATHERINE T. DE

; OLIVEIRA JÚNIOR, SÉRGIO D. DE

; LIMA, WILDSON B. DE BRITO

; MEDEIROS, FÁBIO G. MACÊDO DE

; LEITÃO, ANA LAURA O. DE SÁ

; DANTAS, JULIA M.M.

; SANTOS, EVERALDO S. DOS

; MACÊDO, GORETE R. DE

; SOUSA JÚNIOR, FRANCISCO C. DE

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Nº 1 elocation e20200752

Resumo: En | Texto: En | PDF: En

Abstract The use of β-galactosidase in food products has been a major focus of the industry. Therefore, the development of efficient and inexpensive methodologies to purify it is essential. Thus, this study aimed to recover the enzyme β-galactosidase (β-gal) by ion-exchange chromatography in a fixed-bed column. Batch adsorption tests were performed using four types of adsorbents. The β-gal adsorption capacity in batch mode using Streamline DEAE resin presented the best performance, with a retention capacity of 18.77 ± 0.14 U/g at pH 6.0. A 22 experimental design was applied to optimize the β-gal recovery using an AKTA Start system, evaluating the ionic strength and the pH as process parameters. The results showed that ionic strength exerted a greater influence on fold purification (FP). The β-gal fraction in elution using 0.1-0.4 M of NaCl showed a yield of 51.65 ± 0.17% and FP of 2.00 ± 0.43. Electrophoresis confirmed the β-gal recovery, where an evident band with a molecular weight between 60 and 120 kDa was observed. These results point to the recovery of a stable β-gal of K. lactis with potential industrial applications.

https://doi.org/10.1590/0001-3765202220200752

Leaf inoculation of Azospirillum brasilense and Trichoderma harzianum in hydroponic arugula improve productive components and plant nutrition and reduce leaf nitrate
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Oliveira, Carlos Eduardo da Silva

; Jalal, Arshad

; Oliveira, Julia Revolti

; Tamburi, Karen Vicentini

; Teixeira Filho, Marcelo Carvalho Minhoto

Pesquisa Agropecuária Tropical

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2022, Volume 52 elocation e72755

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO O uso de fungos e bactérias benéficos ao crescimento das plantas pode reduzir a concentração de nitrato nas folhas e melhorar a qualidade dos alimentos produzidos. Objetivou-se avaliar o efeito isolado e combinado da inoculação com Azospirillum brasilense e Trichoderma hazianum, em duas condutividades elétricas, na nutrição e produção do cultivo hidropônico de rúcula. O experimento foi delineado em blocos casualizados, em esquema fatorial 4 x 2, com cinco repetições. Os tratamentos consistiram de inoculações (não inoculado, A. brasilense, T. harzianum e coinoculação) e duas condutividades elétricas (1,4 e 1,6 dS m-1). A inoculação isolada de T. harzianum e A. brasilense produziu maior massa fresca de raiz, enquanto o índice de clorofila foliar foi maior com a inoculação de A. brasilense, em relação aos demais tratamentos. A inoculação de A. brasilense reduziu a concentração de nitrato nas folhas de rúcula. As inoculações e coinoculação de A. brasilense e T. harzianum melhoraram os componentes produtivos e a nutrição das plantas, reduziram a concentração de nitrato foliar e promoveram a biofortificação das folhas de rúcula com Zn e Fe. Além disso, a inoculação com T. harzianum promoveu concentração foliar de P e S.

ABSTRACT Using beneficial fungi and bacteria to plant growth may reduce the leaf nitrate content and improve the quality of produced food. This study aimed to evaluate the isolated and combined effect of inoculation with Azospirillum brasilense and Trichoderma hazianum at two electrical conductivities on the nutrition and production of hydroponic arugula cultivation. The experiment was designed in randomized blocks, in a 4 x 2 factorial scheme, with five replications. The treatments consisted of inoculations (non-inoculated, A. brasilense, T. harzianum and co-inoculation) and two electrical conductivities (1.4 and 1.6 dS m-1). The isolated inoculation of T. harzianum and A. brasilense produced a higher root fresh mass, while the leaf chlorophyll index was higher with the inoculation of A. brasilense, concerning the other treatments. The inoculation of A. brasilense reduced the nitrate content in the arugula leaves. The inoculations and co-inoculation of A. brasilense and T. harzianum improved the yield components and plant nutrition, reduced the leaf nitrate content and promoted the biofortification of arugula leaves with Zn and Fe. In addition, the inoculation with T. harzianum increased the P and S leaf content.

https://doi.org/10.1590/1983-40632022v5272755

Evaluation of temporary cement to prevent bacterial contamination of the root canal after pulpectomy
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PEREIRA, Letícia Martins

; NAVES, Sophia Maria Mateus

; COSTA, Júlia Modesto da

; MORAES, Igor de Oliveira

; SILVA, Sandra Regina Echeverria Pinho da

; FONTANA, Carlos Eduardo

; PINHEIRO, Sérgio Luiz

RGO - Revista Gaúcha de Odontologia

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2022, Volume 70 elocation e20220035

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Avaliar a capacidade do obturador provisório (OP) e da gutapercha em bastão (GP) de prevenir a contaminação bacteriana dos condutos radiculares. Foram selecionados 80 incisivos centrais superiores decíduos artificiais que foram divididos aleatoriamente em 2 grupos: OP (n = 40) e GP (n = 40). Foi realizado acesso endodôntico, instrumentação rotatória, preenchimento do canal radicular e selamento coronário conforme os grupos. Foi feita a semeadura de S.mutans e E. faecalis na entrada do canal radicular. Ambos os grupos foram subdivididos em 5 tempos experimentais (24, 48, 72, 96 e 120 horas), com 8 espécimes por tempo experimental: 5 submetidos a preenchimento do canal radicular e selamento coronário (com OP ou GP) e 3 controles (apenas selamento coronário, sem preenchimento do canal). Todos os espécimes foram incubados em jarras de anaerobiose a 37°C e a contaminação bacteriana foi avaliada em espectrofotômetro. Utilizou-se ANOVA (teste t) para a comparação da contaminação e o teste de Kruskal-Wallis para a comparação dos escores da obturação entre os grupos experimentais. Foi observada diferença significativa no selamento nas primeiras 24 horas entre GP e controles (p = 0,046). Não houve diferença estatisticamente significativa no padrão de preenchimento entre os canais selados com OP versus GP. Os espécimes selados com GP apresentaram menor contaminação do que os controles nas primeiras 24 horas. Nos demais tempos experimentais, tanto GP quanto OP não foram eficientes no controle da contaminação bacteriana; ambos apresentaram falha no selamento coronário.

ABSTRACT To evaluate the ability of temporary cement (TC) and gutta-percha sticks (GP) to prevent bacterial contamination of the root canal through the coronal seal after pulpectomy. Eighty artificial primary maxillary central incisors were selected and randomly divided into 2 groups: TC (n = 40) and GP (n = 40). Endodontic access, rotary instrumentation, root canal filling, and coronal sealing were performed according to group allocation. The root canal opening was seeded with S. mutans and E. faecalis. Both groups were subdivided into 5 experimental time points (24, 48, 72, 96, and 120 hours), with 8 specimens per time-point group: 5 in which both root canal filling and coronal sealing were performed (with either TC or GP) and 3 controls (coronal sealing alone, without root canal filling). All specimens were incubated in an anaerobic jar at 37°C, and bacterial contamination was assessed in a spectrophotometer. ANOVA (t-test) was used to compare contamination and the Kruskal-Wallis test to compare filling scores between the experimental groups. A significant difference was observed in sealing in the first 24 hours between GP and controls (p = 0.046). There was no significant difference in the filling pattern between canals sealed with TC versus GP. Specimens sealed with GP showed less contamination than controls in the first 24 hours. At later time points, neither GP nor TC were effective at controlling bacterial contamination; both failed to provide adequate coronal sealing.

https://doi.org/10.1590/1981-86372022003520210014

10.

Type C botulism outbreak in free-ranging waterfowl in Goiás
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Martins, Andressa S.

; Silva, Tamires A.

; Rosa, Isabella C.C.R.

; Oliveira, Alexia G.F.

; Oliveira, Márcio P.

; Saraiva, Júlia R.

; Dutra, Iveraldo S.

; Borsanelli, Ana Carolina

Pesquisa Veterinária Brasileira

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2022, Volume 42 elocation e07166

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO: O botulismo é uma doença geralmente fatal, causada pela ingestão de neurotoxinas produzidas pelo Clostridium botulinum. O presente estudo descreve os aspectos epidemiológicos, clínicos e laboratoriais de um surto de botulismo tipo C em aves aquáticas de vida livre habitantes de parque urbano em Quirinópolis, Goiás. De uma população de cerca de 80 aves aquáticas, um total de 30 aves, entre patos (Cairina moschata), marrecos (Anas platyrhynchos) e gansos (Anser cygnoides), morreram no intervalo de 10 dias. Destes, seis aves apresentaram sinais de paralisia flácida de membros pélvicos, pálpebras, pescoço e asas. Para confirmar a suspeita de botulismo, foram analisadas quatro amostras da água do lago, duas amostras da ração consumida pelas aves e amostras de soro, conteúdo intestinal, conteúdo estomacal e fígado de dois marrecos que morreram após apresentarem os sinais clínicos. Pelo bioensaio e neutralização com antitoxina homóloga em camundongos foi possível detectar a presença de toxina botulínica tipo C em uma amostra de água e no conteúdo intestinal de um dos marrecos necropsiados. Adicionalmente, pela reação em cadeia da polimerase identificou-se a presença de C. botulinum tipo C na água do lago. Com base nos sinais clínicos e resultados laboratoriais estabeleceu-se o diagnóstico de botulismo causado pela toxina botulínica tipo C e veiculada provavelmente pela água do lago.

ABSTRACT: Botulism is generally a fatal disease caused by ingestion of neurotoxins produced by Clostridium botulinum. The present study describes the epidemiological, clinical, and laboratory aspects of a type C botulism outbreak in free-living aquatic birds residing in an urban park in Quirinópolis, Goiás, Brazil. Among a population of approximately 80 waterfowl, a total of 30 birds, including ducks (Cairina moschata), teals (Anas platyrhynchos), and geese (Anser cygnoides), died within 10 days. Of these, six birds showed signs of flaccid paralysis of the pelvic limbs, eyelids, neck, and wings. To confirm the suspicion of botulism, four lake water samples, two samples of the feed consumed by the birds, and samples of serum, intestinal content, stomach content, and liver tissue from two teals that died after presenting clinical signs were analyzed. Using bioassay and neutralization with homologous antitoxin in mice, it was possible to detect the presence of botulinum toxin type C in a water sample and in the intestinal content of one of the necropsied teals. Additionally, the presence of C. botulinum type C was identified in the lake water using polymerase chain reaction. Based on the clinical signs and laboratory results, a diagnosis of botulism caused by botulinum toxin type C was confirmed with probable transmission by lake water.

https://doi.org/10.1590/1678-5150-pvb-7166

11.

Effects of diet-induced hypercholesterolemia and gold nanoparticles treatment on peripheral tissues
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RODRIGUES, MATHEUS S.

; MARTINS, JULIA N.

; PAULA, GABRIELA C. DE

; VENTURINI, LIGIA M.

; SILVEIRA, GUSTAVO DE B.

; STRECK, EMÍLIO L.

; BUDNI, JOSIANI

; ÁVILA, RICARDO A. MACHADO DE

; BEM, ANDREZA F. DE

; SILVEIRA, PAULO C.L.

; OLIVEIRA, JADE DE

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Supl. 4 elocation e20211081

Resumo: En | Texto: En | PDF: En

Abstract Cholesterol is a lipid molecule of great biological importance to animal cells. Dysregulation of cholesterol metabolism leads to raised blood total cholesterol levels, a clinical condition called hypercholesterolemia. Evidence has shown that hypercholesterolemia is associated with the development of liver and heart disease. One of the mechanisms underlying heart and liver alterations induced by hypercholesterolemia is oxidative stress. In this regard, in several experimental studies, gold nanoparticles (AuNP) displayed antioxidant properties. We hypothesized that hypercholesterolemia causes redox system imbalance in the liver and cardiac tissues, and AuNP treatment could ameliorate it. Young adult male Swiss mice fed a regular rodent diet or a high cholesterol diet for eight weeks and concomitantly treated with AuNP (2.5 μg/kg) or vehicle by oral gavage. Hypercholesterolemia increased the nitrite concentration and glutathione (GSH) levels and decreased the liver’s superoxide dismutase (SOD) activity. Also, hypercholesterolemia significantly enhanced the reactive oxygen species (ROS) and GSH levels in cardiac tissue. Notably, AuNP promoted the redox system homeostasis, increasing the SOD activity in hepatic tissue and reducing ROS levels in cardiac tissue. Overall, our data showed that hypercholesterolemia triggered oxidative stress in mice’s liver and heart, which was partially prevented by AuNP treatment.

https://doi.org/10.1590/0001-3765202220211081

12.

Clinical characteristics and evolution of hematological patients and COVID-19 in Argentina: a report from the Argentine Society of Hematology
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Basquiera, Ana L.

; García, Mercedes J

; Martinez Rolón, Juliana

; Olmedo, Julieta

; Laviano, Julia

; Burgos, Rubén

; Caeiro, Gastón

; Remaggi, Guillermina

; Raña, Pablo

; Paoletti, Mariano

; González, Carlos M.

; Fernández, Isolda

; Pavlovsky, Astrid

; Perusini, Maria A.

; Rodriguez, Andrea

; Guanchiale, Luciana

; Carvani, Analia

; Mandrile, Laura

; Figueroa, Flavia

; Vicente Reparaz, Ángeles

; Fragapane Mathus, Patricia N.

; Garate, Gonzalo

; Fauque, María E.

; Kantor, Gustavo

; Cruset, Soledad

; Gonzalez Lorch, Jacqueline S.

; Szelagowski, Milagros

; Giarini, María P.

; Oliveira, Natalia

; García, María C.

; Ventriglia, María V.

; Pereyra, Patricio H.

; Gutierrez, Daniel R.

; Kusminsky, Gustavo

; Troccoli, Josefina

; Freitas, María J.

; Cranco, Santiago

; Del V.Sanchez, Natalia

; Rey, Irene

; Funes, María E.

; Jarchum, Sol

; Freue, Julian

; Miroli, Augusto

; Guerrero, Osvaldo

; López Ares, Lisa

; Campestri, Reinaldo

; Bove, Victor

; Salinas, Graciela N.

; Cabrejo, María

; Milone, Jorge H.

; Zabaljauregui, Soledad

; Gotta, Daniel

; Dupont, Juan Carlos

; Stemmelin, German

Medicina (Buenos Aires)

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Ago 2021, Volume 81 Nº 4 Páginas 536 - 545

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract Individuals with malignancies and COVID-19 have a lower survival compared with the general population. However, the information about the impact of COVID-19 on the whole hematological population is scarce. We aimed to describe the 30th day overall survival (OS) after COVID-19 infection in pa tients with a hematological disease in Argentina. A completely anonymous survey from the Argentine Society of Hematology was delivered to all the hematologists in Argentina; it started in April 2020. A cut-off to analyze the data was performed in December 2020 and, finally, 419 patients were reported and suitable for the analysis (average age: 58 years, 90% with malignant diseases). After the COVID-19 diagnosis, the 30-day OS for the whole population was 80.2%. From the entire group (419), 101 (24.1%) individuals required intensive care unit admission, where the 30-day OS was 46.6%. Among allogeneic stem cell transplant recipients, the 30-day OS was 70.3%. Factors associated with a low OS were two or more comorbidities, an active hematological disease and history of chemotherapy. In individuals with the three factors, the 30-day OS was 49.6% while the 30-day OS in those without those factors was 100%. Patients with hematological diseases have a higher mortality than the general population. This group represents a challenge and requires careful decision-making of the treatment in order not to compromise the chances of cure.

Resumen El presente estudio tuvo por objetivo primario conocer la mortalidad de pacientes con enfermedad hematológica que presentaron infección por COVID-19 en Argentina. Para ello se difundió una encuesta desde la Sociedad Argentina de Hematología (SAH) entre los hematológos para informar sobre los pacientes con enfermedades hematológicas y diagnóstico de infección por SARS- CoV-2, entre el 19/4/2020, y el 7/12/2020. Se incluyeron individuos de todas las edades con diagnóstico de enfermedad hematológica benigna o maligna e infección por SARS-CoV-2 confirmada por técnica de RT-PCR. Se analizaron 419 pacientes (mediana 58 años; 90% enfermedades malignas). La supervivencia al día 30 fue de 80.2%. La supervivencia fue menor en aquellos que requirieron internación (74.2%), cuidados intensivos (46.6%) y asistencia respiratoria mecánica (36.8%). Entre los trasplantados alogénicos la supervivencia fue 70.3%. Los factores vinculados a la supervivencia global fueron las comorbilidades, el estado de la enfermedad al momento de la infección y el antecedente de quimioterapia. Se pudo establecer un score en el que aquellos que tuvieron un puntaje de 4 alcanzaron una supervivencia del 49.6% al día 30, mientras que la de los pacientes con score 0 fue del 100% a 30 días. En comparación con la población general, los pacientes con enfermedades hematológicas presentan una mayor mortalidad vinculada al COVID-19, motivo por el cual es primordial definir pautas destinadas a disminuir la exposición de los mismos sin comprometer las posibilidades de beneficiarse del tratamiento de la enfermedad de base.

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13.

Microwave-Assisted Acid Digestion: Evaluation of Reaction Vessel Design and Performance
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Garitta, Julia A.

; Fialho, Lucimar L.

; Oliveira, Glenda S. de

; Maria, Roberta M.

; Pirola, Camillo

; Ferreira, Antônio G.

; Nóbrega, Joaquim A.

Journal of the Brazilian Chemical Society

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Abr 2021, Volume 32 Nº 4 Páginas 702 - 711

Resumo: En | Texto: En | PDF: En

Nowadays, microwave-assisted procedures using closed vessels with thermal, chemical, and mechanical resistance are the state-of-the-art for efficient digestion of samples. Safety issues related to sample reactivity should be considered and analytical throughput is also a critical parameter. The choice of a specific vessel for a target application is not trivial and simple experiments are presented here for rice flour and bovine liver samples to illustrate effects of vessel design on digestion performance. Despite using the same heating program, the residual carbon contents varied from 22 to 67% to bovine liver digests and from 7 to 96% to rice flour digests. Quantitative recoveries were obtained for most analytes. Low recoveries were observed mainly for Ca and Fe. Analytical performance is related to different sizes, shapes and the gradient of temperature for each model of digestion vessel. It was demonstrated that taller vessels improved regeneration of nitric acid.

https://doi.org/10.21577/0103-5053.20200222 198 downloads

14.

Morita-Baylis-Hillman Reaction with 7-Chloroquinoline Derivatives-New Compounds with Potential Anticancer Activity
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Oliveira, João Paulo G.

; Caleffi, Guilherme S.

; Silva, Everton P.

; Coelho, Maísa C.

; Castro, Aleff C.

; Mendes, Rhuan K. S.

; Olegário, Tayná R.

; Lima-Junior, Claudio G.

; Vasconcellos, Mario L. A. A.

; Souza, Júlia L. C.

; Souza, Sílvia M.

; Militão, Gardênia C. G.

; Vaz, Boniek G.

; Ramalho, Ruver R. F.

Journal of the Brazilian Chemical Society

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Fev 2021, Volume 32 Nº 2 Páginas 347 - 354

Resumo: En | Texto: En | PDF: En

Morita-Baylis-Hillman adducts (MBHA) is a class of polyfunctional molecules that has been standing out due to their versatility and expressive biological activities. Therefore, this paper describes the synthesis and antiproliferative activity of some new MBHA/7-choroquinoline hybrids. The Michael acceptors were obtained starting from 4,7-dichloroquinoline which were submitted to the Morita-Baylis-Hillman reaction with ortho, meta and para-nitrobenzaldehyde. The in vitro screening of the synthetized MBHA against NCI-H292, HCT-116 and MCF-7 cancer cells suggests the influence of the spacer chain in its inhibition potential. The 50% inhibitory concentration (IC50) obtained in the antiproliferative assay using MCF-7, HCT-116, HL-60 and NCI-H292 cancer cells indicate expressive cytotoxic potential of the adducts containing nitro group in the ortho position, with IC50 of 4.60 µmol L-1. MBHA/7-choroquinoline hybrids were more active than MBHA described in literature, indicating the improvement of the cytotoxic effect due to 7-chloroquinoline moiety in the molecular structure, with maximum selectivity index values of 11.89.

https://doi.org/10.21577/0103-5053.20200185 303 downloads

15.

Prevalence of nasal carriers of methicillin-resistant Staphylococcus aureus in primary health care units in Brazil
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Goes, Isabella Carolina Rodrigues dos Santos

; Romero, Letícia Calixto

; Turra, Ana Julia

; Gotardi, Maria Angélica

; Rodrigues, Talyssa Fernandes Silva de Oliveira

; Santos, Lalessa de Oliveira

; Dores, Jéssica Cristina das

; Nascimento, Michel Ulloffo do

; Cavalleri, Andressa Côrtes

; Pinheiro-Hubinger, Luiza

; Eller, Lizziane Kretli Winkelstroter

; Pereira, Valéria Cataneli

Revista do Instituto de Medicina Tropical de São Paulo

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2021, Volume 63 elocation e14

Resumo: En | Texto: En | PDF: En

ABSTRACT Nasal carriage of Staphylococcus aureus by healthcare workers is of great clinical importance as it facilitates the contamination of medical devices and cross-transmission. However, studies regarding the epidemiology and dissemination of S. aureus and Methicillin-resistant S. aureus (MRSA) within the Primary Health Care in Brazil are scarce. The current study aimed to detect and characterize S. aureus and MRSA strains from the nasal cavities of 63 healthcare working in primary health care units in order to determine the prevalence of S. aureus and MRSA, biofilm formation and resistance profile of these isolates. PCR reactions were performed for detecting mecA, icaA and icaD genes. The phenotypic antimicrobial susceptibility was assessed by the disk diffusion method and biofilm formation by the Congo Red Agar (CRA) method. The MRSA isolates were typed for the Staphylococcal Cassette Chromosome mec (SCCmec). The prevalence of nasal carriage of S. aureus was 74.6%, of which 72.3% were MRSA carrying SCCmec type I (24.4%), III (34.1%), IV (36.6%). Two (4.9%) isolates presented a non-typeable cassette by the performed technique. The antimicrobial susceptibility evaluation evidenced penicillin resistance in 66.1% of S. aureus, erythromycin resistance in 49.2%, while 37.3% were resistant to oxacillin, 28.8% to cefoxitin, 5.1% to levofloxacin and 5.1% to clindamycin. All isolates were biofilm producers and 96.6% of the strains contained the ica biofilm-forming genes (icaA and/or icaD). We have demonstrated a high prevalence of S. aureus and MRSA carriage among health care working in Primary Health Care units, the presence of SCCmec types I, III and IV, in addition to their high ability to form biofilm, factors that possibly contribute to the dissemination and persistence of these pathogens within the primary care services. These observations highlight the importance of broadening the perspective of Health Care-Associated Infections prevention, including all health care levels, which are currently little explored. In addition, the dynamics and resistance mechanisms of S. aureus transmission still need to be further clarified to enable the implementation of more effective prevention measures.

https://doi.org/10.1590/s1678-9946202163014 661 downloads

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