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ABSTRACT: Pullorum disease is described worldwide and is caused by Salmonella enterica subspecies enterica serovar Gallinarum biovar Pullorum (S. Pullorum). S. Pullorum infection is important in commercial poultry, provoking a systemic disease with high mortality rates. Its occurrence requires notification, and when it is diagnosed in commercial breeding flocks, its eradication is demanded. The aim of this study was to report a severe outbreak of Pullorum disease in young Guinea fowl (Numida meleagris), resulting in 100% mortality of keets (n=290) within the first two weeks of age. All examined keets had enlarged liver, kidneys and spleen (5/5), and the affected tissues were submitted to histological and bacteriological examination. On histopathology, random paratyphoid nodules characterized by areas of necrosis with fibrin and a moderate infiltrate of macrophages and heterophils were observed in the liver. In kidneys, discrete areas of necrosis associated with moderate multifocal infiltrates of lymphocytes, and plasma cells were observed. In the spleen, a moderate infiltrate of macrophages was noticed. Isolation of colonies suggestive of S. Pullorum from liver and spleen was performed in selective agars and, after biochemical tests, confirmed by specific duplex-PCR. The antimicrobial susceptibility test of the isolated strain revealed resistance to only sulfamethoxazole + trimethoprim among the tested antimicrobials. The S. Pullorum isolate recovered in the present study was highly pathogenic to N. meleagris and may represent a risk to other avian species, including industrial poultry.

RESUMO: A pulorose é descrita mundialmente e é causada por Salmonella enterica subespécie enterica sorovar Gallinarum biovar Pullorum (S. Pullorum). A infecção por S. Pullorum é importante em aves comerciais, provocando doença sistêmica com altas taxas de mortalidade. Sua ocorrência requer notificação e quando diagnosticada em aves de criação comercial resulta na erradicação do plantel. O objetivo deste estudo foi relatar um surto grave de pulorose em filhotes de galinhas-d’Angola (Numida meleagris), resultando em 100% de mortalidade das aves (n=290) nas primeiras duas semanas de idade. Os pintinhos recebidos tinham hepato, espleno e nefromegalia (5/5). Os tecidos dos cinco indivíduos recebidos foram submetidos a exame histológico e bacteriológico. Na histopatologia, foram observados nódulos paratifoides aleatórios caracterizados por áreas de necrose com fibrina e infiltrado moderado de macrófagos e heterófilos no fígado. Nos rins, foram observadas áreas discretas de necrose associadas a infiltrados multifocais moderados de linfócitos e plasmócitos. No baço, foi observado infiltrado moderado de macrófagos. O isolamento de colônias sugestivas de S. Pullorum de fígados e baços foi realizado em ágares seletivos e, após testes bioquímicos, confirmado por duplex-PCR específico. A susceptibilidade antimicrobiana da cepa isolada revelou resistência apenas ao sulfametoxazol + trimetoprim entre os antimicrobianos testados. O isolado de S. Pullorum recuperado no presente estudo foi altamente patogênico para N. meleagris e pode representar um risco para outras espécies de aves, incluindo aves industriais.

https://doi.org/10.1590/1678-5150-pvb-7088

Evaluating the impacts of Payment for Ecosystem Services (water supplies) in an agricultural system of the Brazilian Cerrado
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OLIVEIRA, FRANCIELE DE KÁSSIA DE

; SANTOS, CAROLINA EMÍLIA DOS

; SIQUEIRA, MARIANA N.

; PASSOS, HAIHANI S.

; MORAIS, ALESSANDRO R.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 N. 2 elocation e20220054

Abstract: En | Text: En | PDF: En

Abstract In this study, we investigated the effects of the Payment for Ecosystem Services (PES) in an agrisystem located in the Brazilian Midwest. This PES benefits the owners of rural properties that encompass springs that feed the Abóbora River microbasin which supplies water for consumption in the city of Rio Verde, Goiás. We evaluated the percentage of native vegetation cover around the springs of the watercourses and also estimated its change over time (2005, 2011 and 2017). The vegetation cover of the Areas of Permanent Preservation (APP) increased by 2.24% on average, seven years after the implantation of the PES. There was little difference in the change of vegetation cover maintained over the study years (2005, 2011, and 2017), however, the vegetation cover increased for 17 springs, decreased for 11 springs, and was completely degraded for other two. To improve the performance of this PES, we recommend (1) expanding the program to include the APPs surrounding the springs, together with the legal reserves of each property, (2) implementing measures to ensure that properties are environmentally adequate, (3) including the properties in the Brazilian Rural Environment Register (CAR), and (4) obtaining environmental licensing for the activities undertaken within the Abóbora River basin.

https://doi.org/10.1590/0001-3765202320220054

Physical, chemical and sensory implications of pequi (Caryocar brasiliense Camb.) sweet bread made with flour, pulp and fruit by-product
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CUNHA, MARIANA C. DA

; TERRA, LAILA H.

; CAMPOS E SOUSA, PIÊTRA

; VILELA, DAIANA R.

; OLIVEIRA, ANA LÁZARA

; SILVA, JÉSSYCA S.

; SIMÃO, SÉRGIO DOMINGOS

; PEREIRA, JOELMA

; ALVES, JOSÉ GUILHERME L.F.

; CARVALHO, ELISÂNGELA ELENA N. DE

; VILAS BOAS, EDUARDO V.B.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 N. 2 elocation e20201550

Abstract: En | Text: En | PDF: En

Abstract This study aimed to develop and evaluate bread with the use of pulp and flours of pequi, in partial replacement of water and wheat flour, to develop a bakery product with good technological, nutritional and sensorial qualities. The pequi husk and pulp flours were obtained by means of a thermal pre-treatment, oven drying and standardization of the dry material. Whereas, the bread formulation was defined through the baker’s formulation. Besides, the dehydration process caused significant changes (p<0.05) in the L* value and chromaticity (C*), mainly of the flours (husk and pequi pulp), such changes are due to non-enzymatic oxidative processes and pigment degradation, especially carotenoids. The effect of the substitution of ingredients (wheat flour and water) by husk and pulp flours and pequi pulp contributed to the increase in lipid, crude fiber, nitrogen-free extract and energy value content. However, the substitution promoted changes in the attributes of color and textural properties, such as increased hardness, chewiness and cohesiveness. Nevertheless, all formulations showed good sensory acceptance and thus, pequi sweet breads can be implemented in school meals for contributing and meeting the nutritional recommendations established by the School Feeding Brazilian Program (PNAE).

https://doi.org/10.1590/0001-3765202320201550

Dereplication by HPLC-ESI-MS and antioxidant activity of phenolic compounds from Banisteriopsis laevifolia (Malpighiaceae)
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ALEXANDRE, GERSO P.

; SIMÃO, JORGE LUIZ S.

; TAVARES, MARIA OLIVIA A.

; ZUFFO, IZABELLA MARIANA S.

; PRADO, STÉPHANIE V.

; PAIVA, JOSEILSON A. DE

; MUSTAPHA, ABUBAKAR N.

; OLIVEIRA, ANSELMO E. DE

; KATO, LUCILIA

; SEVERINO, VANESSA GISELE P.

Anais da Academia Brasileira de Ciências

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2022, Volume 94 N. 1 elocation e20201844

Abstract: En | Text: En | PDF: En

Abstract The genus Banisteriopsis (Malpighiaceae) comprises 77 genera and 1,300 species. Despite efforts to provide detailed information about the chemical wealth of B. laevifolia, this article provides the identification and characterization of compounds from the ethanolic extracts of the leaves and flowers using advanced methodologies which include high-performance liquid chromatography coupled to tandem mass spectrometry, which contribute to the knowledge about compounds present in the genus Banisteriopsis. The dereplication aided by Global Natural Products Social Molecular Networking afforded the identification of seven compounds reported for this species for the first time. A mixture of two known flavonoids and a diterpenoid, 18-hydroxy-ent-halima-1(10),13-(E)-dien-15-oic acid, were isolated by conventional separation methods. The elevated 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity observed in some samples was attributed to either the type of extract, the presence of 3,4,5-trihydroxybenzoic acid, or the influence of the substitution pattern and the synergistic effect of the compounds present. Principal Component Analysis was applied to correlate mass spectrometry data with the antioxidant activity of the samples. The high diversity of metabolites found in this study and those which have been reported for Banisteriopsis strongly recommends further investigation into the chemical and biological properties of these species.

https://doi.org/10.1590/0001-3765202220201844

SARS-CoV-2 and Multi-Organ damage – What men's health specialists should know about the COVID-19 pathophysiology
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Teixeira, Thiago A.

; Bernardes, Felipe S.

; Oliveira, Yasmin C.

; Hsieh, Mariana K.

; Esteves, Sandro C.

; Duarte Neto, Amaro N.

; Kallas, Esper G.

; Hallak, Jorge

International braz j urol

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jun 2021, Volume 47 N. 3 Pages 637 - 646

Abstract: En | Text: En | PDF: En

https://doi.org/10.1590/s1677-5538.ibju.2020.0872 1374 downloads

Poisoning by Megathyrsus maximus (Sin. Panicum maximum) cv. Colonião in horses in the state of Rio de Janeiro
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França, Ticiana N.

; Carletti, Stephni M.

; Rocha, Juliana F.

; Santos, Bartolomeu B.N.

; Oliveira, Mariana C.

; Ubiali, Daniel G.

; Malafaia, Pedro

; Peixoto, Paulo Vargas

Pesquisa Veterinária Brasileira

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2021, Volume 41 elocation e06848

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: Surtos de cólica em equinos vêm sendo associados ao pastejo de várias cultivares de Megathyrsus maximus (Sin. Panicum maximum) nas regiões Norte e Centro-Oeste do Brasil. Neste trabalho relata-se um surto de cólica em equinos determinado pela ingestão da variedade Colonião de M. maximus, cultivar até então não descrita como tóxico. Os cinco equinos, oriundos do Pelotão de Veterinária do Centro de munição do Exército situado no município de Paracambi/RJ, estavam em uma mesma pastagem de M. maximus, tinham acesso à água tratada e ao concentrado comercial para equinos. Todos os equinos tiveram sinais clínicos de cólica por timpanismo e três deles morreram. O curso clínico variou de quatro a cinco dias nos três equinos que morreram e de 10 a 15 dias nos dois equinos que recuperaram-se da cólica. À necropsia, os principais achados foram timpanismo intestinal e gástrico e hemorragias na parede intestinal. À microscopia havia enterite linfoplasmocítica e eosinofílica difusa moderada com erosões multifocais e edema submucoso associado à vasculite multifocal. A patogênese da cólica pela ingestão de M. maximus ainda não foi elucidada, no entanto, alguns autores têm sugerido que uma maior concentração de amido presente na forrageira durante o período de chuvas possa ser responsável pela ação tóxica da planta. Contudo as observações aqui levantadas não dão suporte a essa hipótese. Sugere-se como medida profilática evitar o pastejo exclusivo de M. maximus por cavalos, por meio de pastagens alternativas, principalmente durante o início das chuvas e rebrota da pastagem. Demonstra-se que, no Brasil, os surtos de cólica em equinos associados à ingestão de variedades de Megathyrsus, também podem ocorrer fora das regiões Norte e Centro-Oeste, desde que existam condições climáticas especiais.

ABSTRACT: Colic outbreaks in horses have been associated with the grazing of several Megathyrsus maximus (Sin. Panicum maximum) cultivars in the North and Central-West regions of Brazil. In this paper, we report a horse colic outbreak in the Southeast region of Brazil caused by ingestion of the “Colonião” cultivar of M. maximus, which has not previously been considered as toxic. The five affected horses belonged to the Veterinary Platoon based at the Central Ammunition Deposit of the Brazilian Army in the city of Paracambi, Rio de Janeiro state, Brazil. The horses had access to treated water and commercial concentrate, and were located in a field of M. maximus at the time of the outbreak. All horses exhibited clinical signs of colic and bloat, and three of them died. The extend of the clinical course ranged from four to five days in the three animals that died; in the two animals that recovered from the colic episodes, the extend of the clinical courses were 10 and 15 days. Necropsy findings revealed intestinal and gastric bloating and hemorrhages involving the intestinal wall. Light microscopy showed moderate diffuse lymphoplasmacytic and eosinophilic enteritis with multifocal erosions, in addition to submucosal edema associated with multifocal vasculitis. The pathogenesis of colic caused by M. maximus ingestion in horses has not yet been elucidated. Some authors have suggested that higher starch concentrations in M. maximus during the rainy season may be responsible for the toxicity of this plant. However, the findings of this study do not support this hypothesis. As a prophylactic measure, it is suggested that horses do not graze exclusively M. maximus at the beginning of rainy periods, in which regrowth of this grass occurs. In Brazil, outbreaks of horse colic associated with ingestion of varieties of Megathyrsus can also occur outside the North and Midwest regions, under specific climate conditions.

https://doi.org/10.1590/1678-5150-pvb-6848

Phytochemical profile of Cespedesia spathulata leaves (Ochnaceae) and its effect on tyrosinase enzyme
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OLIVEIRA, DÉBORA R. DE

; SILVA, MARIANA R. DA

; CHAVES, OTAVIO A.

; CASTRO, ROSANE N.

; OLIVEIRA, MARCIA C.C. DE

; BRAZ-FILHO, RAIMUNDO

; CARVALHO, MÁRIO G. DE

Anais da Academia Brasileira de Ciências

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2021, Volume 93 N. 4 elocation e20200443

Abstract: En | Text: En | PDF: En

Abstract Phytochemical studies of Cespedesia spathulata (Ochnaceae) leaves using 1H, 13C NMR, and GC-MS have led to the isolation of some metabolites identified for the first time in these species such as cathechin, epicatechin, vitexin, orientin, 6’’-O-acetyl-vitexin, sitosterol, stigmasterol, phytol, 4,5-dihydrovomifoliol and a mixture of aliphatic methyl esters, together with ochnaflavone, which was previously isolated from this plant. The modulating activity of some fractions and compounds from Cespedesia spathulata towards tyrosinase enzyme was assayed by spectroscopic and theoretical means/experiments. The dichloromethane fraction (133 μg mL-1) and ochnaflavone (333 μM) inhibited tyrosinase activity by 20 % and 2.0 %, respectively, whereas the ethyl acetate fraction (666 μg mL-1) and ±catechins (catechin and epicatechin - 800 μM) activated it by 104 % and 384 %, respectively. Quantum chemical calculations suggested that catechin and epicatechin are better activators than L-DOPA by interacting with Cu (II) ions. Molecular docking results suggested that hydrogen bonding and hydrophobic interactions are the main binding forces between each tyrosinase activator and the amino acid residues inside the active protein binding pocket.

https://doi.org/10.1590/0001-3765202120200443 86 downloads

Early liver function improvement following successful treatment of chronic hepatitis C in patients with decompensated cirrhosis: a real-life study
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Lourenço, Mariana Sandoval

; Zitelli, Patricia Momoyo Y.

; Cunha-Silva, Marlone

; Oliveira, Arthur Ivan N.

; Lima, Roque Gabriel Rezende de

; Souza, Evandro de Oliveira

; Oliveira, Claudia P.

; Sevá-Pereira, Tiago

; Carrilho, Flair J.

; Pessoa, Mario G.

; Mazo, Daniel F.

Clinics

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2021, Volume 76 elocation e3186

Abstract: En | Text: En | PDF: En

OBJECTIVES: Despite higher rates of sustained virologic response (SVR), important concerns remain when patients with decompensated cirrhosis due to hepatitis C virus (HCV) are treated with direct-acting antiviral agents (DAA). Questions include efficacy, safety, and the magnitude of liver function improvement. Here, we aimed to evaluate HCV treatment data in this specific population in Brazil. METHODS: We included 85 patients with decompensated cirrhosis submitted to HCV therapy with DAA followed at two academic tertiary centers in the southeastern region of Brazil. RESULTS: Seventy-nine patients (92.9%) were Child-Pugh (CP) score B, and six (7.1%) were CP score C. The mean MELD score was 12.86. The most common treatment was sofosbuvir plus daclatasvir±ribavirin for 24 weeks. The overall intention-to-treat (ITT) SVR rate was 87.4% (74/85) and modified-ITT 96.1% (74/77). ITT SVR was associated with lower baseline INR values (p=0.029). Adverse events (AE) occurred in 57.9% (44/76) of patients. Serious AE were reported in 12.8% (10/78), and were related to the presence of hepatic encephalopathy (p=0.027). SVR was associated with improvement in CP (p<0.0001) and MELD scores (p=0.021). Among baseline CP score B patients with SVR, 46% (29/63) regressed to CP score A. Ascites was independently associated with no improvement in liver function in patients who achieved SVR (p=0.001; OR:39.285; 95% CI:4.301-258.832). CONCLUSIONS: Patients with decompensated HCV cirrhosis showed a high SVR rate with interferon-free therapy. Early liver function improvement occurred after successful HCV eradication. However, long-term follow-up of these patients after SVR remains strongly advised.

https://doi.org/10.6061/clinics/2021/e3186

Cross-cultural adaptation of the Internet Gaming Disorder Scale – Short Form (IGDS9-SF) to the Brazilian context
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Donadon, Mariana F.

; Chagas, Marcos H. N.

; Apolinário-da-Silva, Thiago D.

; Okino, Erika T. K.

; Hallak, Jaime E. C.

; Nicoletti, Êdela A.

; Pereira-Lima, Karina

; Degan, Edson A.

; Santos, Rafael G.

; Machado-de-Sousa, João Paulo

; Simei, João L. Q.

; Oliveira, Lucas M.

; Pontes, Halley M.

; Osório, Flávia L.

Trends in Psychiatry and Psychotherapy

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sep 2020, Volume 42 N. 3 Pages 262 - 266

Abstract: En | Text: En | PDF: En

Abstract Introduction The Internet Gaming Disorder Scale – Short Form (IGDS9-SF) assesses the severity, harmful effects and/or consequences of excessive online and offline gaming. Its conciseness and theoretical foundations on current diagnostic criteria of gaming disorders make it a useful resource for clinical and screening settings. Objective To describe the process of cross-cultural adaptation of the IGDS9-SF to the Brazilian context. Methods The cross-cultural adaptation involved the steps of independent translation of the instrument, synthesis version, back-translation, pre-test and elaboration of the final version. Content validity assessment was conducted by a multidisciplinary committee of experts and consisted of both a quantitative analysis (calculation of content validity coefficients – CVC) and a qualitative analysis (assessment of the experts’ comments and suggestions). The pre-test sample consisted of 30 gamers with variable sociodemographic characteristics. Results The cross-cultural adaptation of the scale followed the proposed protocol, and the CVC was satisfactory (≥ 0.83) for all the structures and equivalences assessed. Most of the suggestions made by the experts were accepted (mainly adjustments and language standardization). The gamers who participated in the pre-test judged the scale easy to understand and did not suggest changes. Discussion The Brazilian version of the IGDS9-SF showed adequate content validity and is available for researchers and clinicians, as well as for the investigation of additional psychometric characteristics.

https://doi.org/10.1590/2237-6089-2019-0032 505 downloads

10.

Toxoplasma gondii and Neospora caninum infections and factors associated in goats in the Parana state, Southern Brazil
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Romanelli, Paulo Roberto

; Matos, Andressa Maria Rorato Nascimento de

; Pinto-Ferreira, Fernanda

; Caldart, Eloiza Teles

; Oliveira, Juliana Silva de

; Anteveli, Gabriela

; Jeanfelice, Brenda Caroline dos Santos

; Stolf, Rafael Luiz

; Sanches, Tainá Favoreto

; Silva, Mariana Kassab e

; Minho, Alessandro Pelegrine

; Cavalcante, Antônio Cezar Rocha

; Freire, Roberta Lemos

; Mitsuka-Breganó, Regina

; Navarro, Italmar Teodorico

Revista Brasileira de Parasitologia Veterinária

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2020, Volume 29 N. 4 elocation e003620

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O objetivo desse estudo foi avaliar a ocorrência de anticorpos anti-Toxoplasma gondii e anti-Neospora caninum e seus fatores associados em caprinos de propriedades do Estado do Paraná, Sul do Brasil. A análise sorológica foi realizada, utilizando-se ELISA indireto em 629 amostras de soro caprino, coletadas em 32 propriedades distribuídas em cinco mesorregiões do Estado. A soropositividade foi observada em 30,7% dos animais para T. gondii, 6,3% para N. caninum e 3,0% para ambos. Os modelos finais de regressão múltipla mostraram que o uso de reprodução assistida reduziu a chance de soropositividade para T. gondii (PR=0,70), enquanto a presença no local de abate na fazenda (PR=2,03) aumentou. Para N. caninum, o fornecimento de ração concentrada (OR=4,80) e a morte dos animais no pré-desmame (OR=9,96) aumentaram a chance de soropositividade. O estudo das variáveis associadas às soropositividades sugere deficiências no saneamento e no manejo reprodutivo dos Animais. Além disso, reconhece pontos críticos para a infecção no manejo da produção animal.

Abstract The aim of this study was to determine the occurrence of anti-Toxoplasma gondii and anti-Neospora caninum antibodies and their associated factors among goats in farms from the Paraná state, South Brazil. The serological analysis was performed by indirect ELISA on 629 goat serum samples collected from 32 farms distributed in five mesorregions from the state. Seropositivity was observed in 30.7% of the animals for T. gondii, 6.3% for N. caninum, and 3.0% for both agents. Final multiple regression models showed that the use of assisted reproduction decreased the chance of seropositivity for T. gondii (PR=0.70) and the slaughtering site on the farm (PR=2.03) increased it. To N. caninum, the supplying concentrated feed to animals (OR=4.80) and animal pre-weaning death (OR=9.96) increased the chance of seropositivity. The variables associated with these seropositivities suggest deficiencies in sanitation and reproductive management. In addition, it recognizes critical points of infection for animal production management.

https://doi.org/10.1590/s1984-29612020076 813 downloads

11.

LIQUID-LIQUID EQUILIBRIA FOR SYSTEMS CONTAINING FATTY ACID ETHYL ESTERS, ETHANOL AND GLYCEROL AT 333.15 AND 343.15 K: EXPERIMENTAL DATA, THERMODYNAMIC AND ARTIFICIAL NEURAL NETWORK MODELING
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Cavalcanti, Rodrigo N.

; Oliveira, Mariana B.

; Meirelles, Antonio J. A.

Brazilian Journal of Chemical Engineering

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jun 2018, Volume 35 N. 2 Pages 819 - 834

Abstract: En | Text: En | PDF: En

Abstract In this study, the liquid-liquid equilibrium (LLE) data of systems containing ethyl linoleate/oleate/palmitate/laurate, ethanol and glycerol at temperatures ranging from 323.15 to 353.15 K were used to evaluate the performance of the NRTL, UNIFAC, Cubic-Plus-Association Equation of State (CPA EoS), and artificial neural network (ANN) models. The systems evaluated correspond to the most important components formed at the end of the ethanolysis reaction of soybean, palm and coconut oils. The temperature range selected is very important for heterogeneous catalysts, especially for high-pressure systems. The accuracy of the models was evaluated by average global deviation. UNIFAC, UNIFAC-LLE and CPA EoS models showed lower accuracy with deviations of 10.1, 8.01 and 5.95%, respectively. In spite of this predictive limitation, these models show high extrapolation capability for the description of LLE behavior when few experimental data are available in the literature. The ANN model shows the best agreement between experimental and predicted data with an average deviation of 1.12%. In this regard, ANN is offered in this work as an alternative to equations of state and activity coefficient models to be used in a more reliable and less cumbersome way for process simulators of biodiesel production and separation equipment design.

https://doi.org/10.1590/0104-6632.20180352s20160267 1055 downloads

12.

Segmental colitis caused by idiopathic myointimal hyperplasia of mesenteric veins
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Costa, Mariana N.

; Saiote, Joana

; Pinheiro, Maria José

; Duarte, Pedro

; Bentes, Teresa

; Ferraz-Oliveira, Mário

; Ramos, Jaime

Revista Española de Enfermedades Digestivas

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dec 2016, Volume 108 N. 12 Pages 821 - 826

Abstract: En | Text: En | PDF: En

Diseases causing colonic ischemia may be mistaken with other causes of segmental colitis such as inflammatory bowel disease, especially in young patients. The authors present the case of a 47-year-old male with severe proctosigmoiditis. Assessment excluded infectious causes, thrombophilia and systemic vasculitis. The initial histological specimen was suggestive of inflammatory bowel disease and therapy was initiated with intravenous steroids and, at day 5, infliximab, with no response. The patient was proposed for surgery. Pathological examination of the surgical specimen revealed an idiopathic myointimal hyperplasia of mesenteric veins, a rare entity exhibiting necrotizing phlebitis with rapid progression to segmental necrosis in the rectosigmoid colon. In this paper the authors discuss the differential diagnosis of proctosigmoiditis in young ages and the approach to this exceptionally rare ischemic entity.

https://doi.org/10.17235/reed.2016.4051/2015 637 downloads

13.

Avaliação lectino-histoquímica de fígado e linfonodo mesentérico de búfalos mantidos em pastagens de Brachiaria spp.
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Miranda, Ileana C.

; Riet-Correa, Gabriela

; Oliveira Júnior, Carlos A.

; Riet-Correa, Beatriz

; Peixoto, Paulo V.

; Costa, Samay Z.R.

; d'Avila, Mariana S.

; Cid, Gabriela C.

; França, Ticiana N.

Pesquisa Veterinária Brasileira

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sep 2016, Volume 36 N. 9 Pages 798 - 804

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo: Animais que se alimentam em pastos de Brachiaria spp. comumente apresentam macrófagos espumosos isolados ou agrupados no fígado, além de cristais no interior de ductos biliares. A patogênese da formação e a natureza do material armazenado nestas células, contudo, ainda não são completamente conhecidas. Através da avaliação lectino-histoquímica, saponinas esteroidais (metabólitos glicosilados secundários) têm sido identificadas nos cristais e no citoplasma das células espumosas, e provavelmente são responsáveis por danificar o fígado e levar ao acúmulo de filoeritrina. Por meio deste trabalho, objetivou-se padronizar e caracterizar a utilização da lectino-histoquímica na detecção de metabólitos glicosilados nos tecidos de búfalos mantidos em diferentes pastos de Brachiaria spp. no Brasil. Fragmentos de fígado e linfonodo mesentérico de 40 animais foram analisados: 10 búfalos mantidos em pastagem predominante de B. decumbens por aproximadamente 12 meses; 10 búfalos mantidos em pastagem predominante de B. brizantha por aproximadamente 18 meses; 10 búfalos mantidos em pastagem de B. brizantha por aproximadamente quatro anos; e, como controle negativo, 10 búfalos mantidos em pastagem livre de Brachiaria spp. desde o nascimento. Quatorze lectinas foram testadas (Con-A, SBA, WGA, DBA, UEA, RCA, PNA, GSL-I, PSA, LCA, PHA-E, PHA-L, SJA e SWGA), em um total de 1120 fragmentos avaliados. Estudos anteriores demonstraram que a lectina PNA possui marcada reatividade para macrófagos espumosos de bovinos e ovinos. No presente estudo, a lectina SWGA apresentou acentuada reatividade e alta especificidade para macrófagos espumosos; WGA, GSL, PHA-E e PHA-L mostraram moderada a acentuada reatividade, mas baixa especificidade aos macrófagos espumosos; as outras lectinas não apresentaram reatividade ou especificidade relevantes. Além disso, não houve diferença relevante de marcação entre os fragmentos coletados de animais que se alimentaram de B. decumbens por 12 meses e B. brizantha por 18 meses. Porém, a diminuição da presença e marcação lectino-histoquímica dos macrófagos espumosos nos tecidos dos búfalos que ingeriram Brachiaria brizantha durante mais tempo indica que os animais podem passar por um processo de adaptação de acordo com o tempo de ingestão da planta. A avaliação lectino-histoquímica pode ser utilizada para caracterizar o material armazenado em macrófagos espumosos presentes no fígado e linfonodo mesentérico de búfalos que se alimentam em pastagens de Brachiaria spp. e ajuda na compreensão da patogênese de formação destas células.

Abstract: Animals grazing Brachiaria spp. commonly present foamy macrophages isolated or grouped in the liver, and crystals within biliary ducts. The pathogenesis of formation and the nature of the material stored in these cells however are not completely known. Through lectin histochemistry evaluation, steroidal saponins (secondary glycosylated metabolites) have been identified in the crystals and within the cytoplasm of the foam cells, which are probably liable for damaging the liver, leading to accumulation of phylloerythrin. This study aims to standardize and characterize the use of lectin histochemistry to detect glycosylated metabolites in tissues of buffaloes kept on different Brachiaria spp. pastures in Brazil. Fragments of liver and mesenteric lymph node from 40 buffaloes were analyzed: 10 buffaloes that were kept in predominant pasture of B. decumbens for 12 months; 10 buffaloes that were kept in pasture with a predominance of B. brizantha for 18 months; 10 buffaloes that were kept on pasture of B. brizantha for about four years; and as a negative control, 10 buffaloes that were maintained on native pasture without Brachiaria spp. since birth. Fourteen lectins were tested (Con-A, SBA, WGA, DBA, UEA, RCA, PNA, GSL-I, PSA, LCA, PHA-E, PHA-L, SJA and SWGA), in a total of 1120 evaluated samples. Previous studies demonstrated that PNA showed great binding reactivity for foamy macrophages in cattle and sheep. In the present study, SWGA showed high specificity and marked binding reactivity for foamy macrophages; WGA, GSL, PHA-E and PHA-L showed moderate to marked reactivity, but low specificity for foamy macrophages. The other lectins had not relevant reactivity or specificity. Moreover there was no relevant reactivity difference between the collected samplesd from buffaloes that grazed B. decumbens for 12 months and Brachiaria brizantha for 18 months. However the decreased presence of foamy macrophages and its lectin histochemical binding in animals that fed on B. brizantha for a longer time, indicates that the buffaloes can pass through an adaptation process according to the plant intake time. Lectin histochemistry analysis can be used to characterize the material stored in foamy macrophages present in liver and mesenteric lymph node of buffaloes that graze on Brachiaria spp. pastures and helps to clarify the pathogenesis of these cells.

https://doi.org/10.1590/s0100-736x2016000900002 1103 downloads

14.

New and Sensitive Electroquantification of Sulfentrazone in Soil by Differential-Pulse Voltammetry
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Catrinck, Mariana N.

; Okumura, Leonardo L.

; Silva, Antonio A.

; Saczk, Adelir A.

; Oliveira, Marcelo F.

Journal of the Brazilian Chemical Society

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sep 2015, Volume 26 N. 9 Pages 1751 - 1759

Abstract: En | Text: En | PDF: En

In this work, a new and sensitive electroanalytical methodology was developed and validated to quantify sulfentrazone in soil samples. Sulfentrazone was initially characterized qualitatively using cyclic voltammetry (CV). Its oxidation occurred by diffusion (mass transport) on a glassy carbon electrode (GCE) via irreversible transfer of one electron close to a peak potential of +0.936 V vs. Ag|AgCl, 3.0 mol L-1 KCl, in 0.10 mol L-1 KOH. Differential-pulse voltammetry (DPV) was the most sensitive and selective technique, with limits of detection (LOD) of 1.94 and 2.19 mmol L-1 and limits of quantification (LOQ) of 6.46 and 7.31 mmol L-1, in the absence and presence of soil matrix, respectively. The reproducibility of the method ranged between 2.65 and 4.2%, with intermediate precision between 5.32 and 10.9%. The recovery rate ranged between 88.5 and 103%. Additionally, the accuracy of the electroanalytical method was validated by comparing the results with data from a standard analytical methodology of high-performance liquid chromatography (HPLC/UV-Vis).

https://doi.org/10.5935/0103-5053.20150150 2608 downloads

15.

Update of the Brazilian floristic list of Algae and Cyanobacteria
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Menezes, Mariângela

; Bicudo, Carlos E. M.

; Moura, Carlos W. N.

; Alves, Aigara M.

; Santos, Alana A.

; Pedrini, Alexandre de G.

; Araújo, Andréa

; Tucci, Andrea

; Fajar, Aurelio

; Malone, Camila

; Kano, Cecília H.

; Sant'Anna, Célia L.

; Branco, Ciro Z.

; Odebrecht, Clarisse

; Peres, Cleto K.

; Neuhaus, Emanuel B.

; Eskinazi-Leça, Enide

; Aquino, Eveline

; Nauer, Fabio

; Santos, Gabriel N.

; Amado Filho, Gilberto M.

; Lyra, Goia M.

; Borges, Gyslaine C.P.

; Costa, Iara O.

; Nogueira, Ina de S.

; Oliveira, Ivania B.

; Paula, Joel. C.de

; Nunes, José M. de C.

; Lima, Jucicleide C.

; Santos, Kleber R.S.

; Ferreira, Leandro C.

; Gestinari, Lísia M.S.

; Cardoso, Luciana S.

; Figueiredo, Marcia A.O.

; Silva, Marcos H.

; Barreto, Maria B.B.B.

; Henriques, Maria C.O.

; Cunha, Maria da G.G.S.

; Bandeira-Pedrosa, Maria E.

; Oliveira-Carvalho, Maria F.

; Széchy, Maria T.M.

; Azevedo, Maria T.P.

; Oliveira, Mariana C. de

; Cabezudo, Mariê M.

; Santiago, Marilene F.

; Bergesh, Marli

; Fujii, Mutuê T.

; Bueno, Norma C.

; Necchi Jr., Orlando

; Jesus, Priscila B.

; Bahia, Ricardo G.

; Khader, Samir

; Alves-da-Silva, Sandra M.

; Guimarães, Silvia M.P.B.

; Pereira, Sonia M.B.

; Caires, Taiara A.

; Meurer, Thamis

; Cassano, Valéria

; Werner, Vera R.

; Gama Jr., Watson A. da

; Silva, Weliton J. da

Rodriguésia

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2015, Volume 66 N. 4 Pages 1047 - 1062

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Apresenta-se uma síntese atualizada de informações sobre algas no Brasil objetivando refinar os dados reunidos até o presente, bem como avaliar os avanços sobre o conhecimento da diversidade de algas no país desde a publicação do Catálogo de Plantas e Fungos do Brasil. Os resultados de 2015 mostraram um acréscimo de 1.250 espécies (35.7%) a um total de 4.747 em relação a 2010. As classes mais diversas em número de espécies foram Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae e Euglenophyceae. Bacillariophyceae e Cyanophyceae tiveram o maior acréscimo de espécies no intervalo de cinco anos. A região Sudeste e Sul foram as mais diversas, porém, as regiões Nordeste com os estados do Piauí e Sergipe e Centro-Oeste com os estados de Mato Grosso, Goiás e Distrito Federal destacaram-se no cenário da biodiversidade nacional. Apesar da escassez de taxonomistas e da infraestrutura limitada, os resultados obtidos evidenciaram um avanço significativo no conhecimento da diversidade de algas no país nesse período de cinco anos, iniciando uma mudança quanto as diferenças geográficas regionais.

Abstract An updated synthesis of cyanobacteria and algae information is presented for Brazil aiming to refine the data gathered to date and evaluate the progress of the biodiversity knowledge about these organisms in the country since the publication of the Catálogo de Plantas e Fungos do Brasil. The results of 2015 showed an increase of 1,250 species (35.7%) when compared to 2010, reaching a total of 4,747 species. The most diverse classes in species number were the Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae and Euglenophyceae. Bacillariophyceae and Cyanophyceae had the highest increase in species number in the five-year interval. The Southeast and South regions were the most diverse, however, the Northeast, with the states of Piauí and Sergipe, and the Central-west region, with Mato Grosso, Goiás and Distrito Federal, also stood out in the national algal biodiversity scenario. Despite the shortage of taxonomists and limited infrastructure, the results showed a significant improvement in the knowledge regarding the diversity of cyanobacteria and algae in the country during the study period, starting to even out regional geographical differences caused by subsampling.

https://doi.org/10.1590/2175-7860201566408 4865 downloads

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