Production and characterization of rhamnolipids by Pseudomonas aeruginosa isolated in the Amazon region, and potential antiviral, antitumor, and antimicrobial activity.

Biosurfactants encompass structurally and chemically diverse molecules with surface active properties, and a broad industrial deployment, including pharmaceuticals. The interest is growing mainly for the low toxicity, biodegradability, and production from renewable sources. In this work, the optimized biosurfactant production by Pseudomonas aeruginosa BM02, isolated from the soil of a mining area in the Brazilian Amazon region was assessed, in addition to its antiviral, antitumor, and antimicrobial activities. The optimal conditions for biosurfactant production were determined using a factorial design, which showed the best yield (2.28 mg/mL) at 25 °C, pH 5, and 1% glycerol. The biosurfactant obtained was characterized as a mixture of rhamnolipids with virucidal properties against Herpes Simplex Virus, Coronavirus, and Respiratory Syncytial Virus, in addition to antimicrobial properties against Gram-positive bacteria (Staphylococcus aureus and Enterococcus faecium), at 50 µg/mL. The antitumor activity of BS (12.5 µg/mL) was also demonstrated, with potential selectivity in reducing the proliferation of breast tumor cells, after 1 min of exposure. These results demonstrate the importance of studying the interconnection between cultivation conditions and properties of industrially important compounds, such as rhamnolipid-type biosurfactant from P. aeruginosa BM02, a promising and sustainable alternative in the development of new antiviral, antitumor, and antimicrobial prototypes.

Risk factors independently associated with the maintenance of severe restriction of oral intake and alternative feeding method indication at hospital outcome in patients after acute ischemic stroke.

BACKGROUND AND AIMS: From a clinical point of view, post-stroke patients present difficulties in swallowing management. The purpose of this research was to identify risk factors that were independently related to the maintenance of a severe restriction of oral intake in patients affected by acute ischemic stroke. METHODS: The authors conducted a prospective observational cohort study of patients with dysphagia post-acute ischemic stroke who were admitted to an Emergency Room (ER). Demographic and clinical data were collected at ER admission. Swallowing data was based on The Functional Oral Intake Scale (FOIS) and was collected at two distinct moments: initial swallowing assessment and at the patient outcome. Patients were divided into two groups according to their FOIS level assigned on the last swallowing assessment (at hospital outcome): G1 with severe restriction of oral intake and indication of feeding tube - patients with FOIS levels 1 to 4; G2 without restriction of food consistencies in oral intake - patients with FOIS levels 5 to 7. RESULTS: One hundred and six patients were included in our study. Results of the multivariate logistic regression model for the prediction of maintenance of a severe restriction of oral intake at hospital outcome in patients post-acute ischemic stroke indicated that increasing age (p = 0.006), and dysarthria (p = 0.003) were associated with higher chances of presenting severe restriction of oral intake at hospital outcome. CONCLUSIONS: Patients with acute ischemic stroke in an Emergency Room may experience non-resolved severe dysphagia, indicating the need to prepare for the care/rehabilitation of these patients.

Risk factors independently associated with the maintenance of severe restriction of oral intake and alternative feeding method indication at hospital outcome in patients after acute ischemic stroke

Abstract Background and aims From a clinical point of view, post-stroke patients present difficulties in swallowing management. The purpose of this research was to identify risk factors that were independently related to the maintenance of a severe restriction of oral intake in patients affected by acute ischemic stroke. Methods The authors conducted a prospective observational cohort study of patients with dysphagia post-acute ischemic stroke who were admitted to an Emergency Room (ER). Demographic and clinical data were collected at ER admission. Swallowing data was based on The Functional Oral Intake Scale (FOIS) and was collected at two distinct moments: initial swallowing assessment and at the patient outcome. Patients were divided into two groups according to their FOIS level assigned on the last swallowing assessment (at hospital outcome): G1 with severe restriction of oral intake and indication of feeding tube - patients with FOIS levels 1 to 4; G2 without restriction of food consistencies in oral intake - patients with FOIS levels 5 to 7. Results One hundred and six patients were included in our study. Results of the multivariate logistic regression model for the prediction of maintenance of a severe restriction of oral intake at hospital outcome in patients post-acute ischemic stroke indicated that increasing age (p = 0.006), and dysarthria (p = 0.003) were associated with higher chances of presenting severe restriction of oral intake at hospital outcome. Conclusions Patients with acute ischemic stroke in an Emergency Room may experience non-resolved severe dysphagia, indicating the need to prepare for the care/rehabilitation of these patients.

Clinical swallowing prognostic indicators in patients with acute ischemic stroke.

OBJECTIVE: A swallowing disorder is present in more than 50% of patients with acute stroke. To identify clinical prognostic indicators of the swallowing function in a population with acute ischemic stroke and to determine prioritization indicators for swallowing rehabilitation. METHODS: Participants were adults admitted to the emergency room who were diagnosed with acute ischemic stroke. Data gathering involved a swallowing assessment to determine the functional level of swallowing (American Speech-Language-Hearing Association National Outcome Measurement System - ASHA NOMS) and the verification of demographic and clinical variables. RESULTS: The study sample included 295 patients. For analysis purposes, patients were grouped as follows: ASHA NOMS levels 1 and 2 - ASHA1 (n = 51); levels 3, 4 and 5 - ASHA2 (n = 96); levels 6 and 7 - ASHA3 (n = 148). Statistical analyses indicated that patients who presented a poorer swallowing function (ASHA1) were older (age ≥ 70 years); had anterior circulation infarct; had lower scores on the Glasgow Coma Scale (GCS ≤ 14 points); took longer to initiate swallowing rehabilitation; had longer hospital stays; made more use of alternative feeding methods; needed more sessions of swallowing rehabilitation to remove alternate feeding methods; took longer to return to oral feeding and had poorer outcomes (fewer individuals discharged from swallowing rehabilitation sessions and increased mortality). CONCLUSION: Patients with acute ischemic stroke, admitted to the emergency room, aged ≥ 70 years, score on the GCS ≤ 14, anterior circulation infarct and dementia should be prioritized for swallowing assessment and rehabilitation.

Clinical swallowing prognostic indicators in patients with acute ischemic stroke / Indicadores de prognóstico clínico da deglutição em pacientes com acidente vascular cerebral isquêmico

ABSTRACT A swallowing disorder is present in more than 50% of patients with acute stroke. Objective To identify clinical prognostic indicators of the swallowing function in a population with acute ischemic stroke and to determine prioritization indicators for swallowing rehabilitation. Methods Participants were adults admitted to the emergency room who were diagnosed with acute ischemic stroke. Data gathering involved a swallowing assessment to determine the functional level of swallowing (American Speech-Language-Hearing Association National Outcome Measurement System - ASHA NOMS) and the verification of demographic and clinical variables. Results The study sample included 295 patients. For analysis purposes, patients were grouped as follows: ASHA NOMS levels 1 and 2 - ASHA1 (n = 51); levels 3, 4 and 5 - ASHA2 (n = 96); levels 6 and 7 - ASHA3 (n = 148). Statistical analyses indicated that patients who presented a poorer swallowing function (ASHA1) were older (age ≥ 70 years); had anterior circulation infarct; had lower scores on the Glasgow Coma Scale (GCS ≤ 14 points); took longer to initiate swallowing rehabilitation; had longer hospital stays; made more use of alternative feeding methods; needed more sessions of swallowing rehabilitation to remove alternate feeding methods; took longer to return to oral feeding and had poorer outcomes (fewer individuals discharged from swallowing rehabilitation sessions and increased mortality). Conclusion Patients with acute ischemic stroke, admitted to the emergency room, aged ≥ 70 years, score on the GCS ≤ 14, anterior circulation infarct and dementia should be prioritized for swallowing assessment and rehabilitation.

RESUMO Alterações da deglutição são observadas em mais de 50% dos pacientes com acidente vascular cerebral isquêmico (AVCI) agudo. Objetivo Identificar os indicadores de prognóstico clínico da funcionalidade da deglutição na população com AVCI em fase aguda, visando o estabelecimento de indicadores de priorização de atendimento fonoaudiológico. Métodos Participaram do estudo adultos admitidos em Pronto Socorro (PS) com AVCI. As etapas de coleta de dados envolveram avaliação fonoaudiológica para determinação do nível funcional da deglutição (American Speech-Language-Hearing Association National Outcome Measurement System - ASHA NOMS) e a coleta de variáveis demográficas e clínicas. Resultados A amostra do estudo incluiu 295 pacientes agrupados de acordo com os níveis ASHA NOMS: níveis 1 e 2 - ASHA1 (n = 51); níveis 3, 4 e 5 - ASHA2 (n = 96); níveis 6 e 7 - ASHA3 (n = 148). As análises indicaram os seguintes resultados significantes: pacientes com pior funcionalidade da deglutição (ASHA1) apresentaram média de idade superior a 70 anos, maior comprometimento da circulação cerebral anterior pós-AVCI, pior pontuação na Escala de Coma de Glasgow (ECG ≤ 14 pontos), demoraram mais tempo para iniciar o atendimento fonoaudiológico, permaneceram mais tempo internados no hospital, fizeram mais uso de via alternativa de alimentação, necessitaram de mais sessões fonoaudiológicas para retirada da via alternativa de alimentação, demoraram mais tempo para retornar para alimentação por via oral e apresentaram pior desfecho (um número menor de indivíduos recebeu alta fonoaudiológica e apresentaram mortalidade aumentada). Conclusão Pacientes com AVCI agudo, admitidos em PS, que apresentem idade ≥ 70 anos, pontuação na ECG ≤ 14, com comprometimento do sistema circulatório cerebral anterior e demência, devem ser priorizados no atendimento fonoaudiológico.

Fatores socioculturais envolvidos no processo de aquisição da linguagem escrita / Socio-cultural factors involved in the written language acquisition process

OBJETIVOS: verificar a influência do meio sociofamiliar no processo de aquisição da linguagem escrita de crianças em atendimento fonoaudiológico e conhecer o perfil sociocultural de seus familiares. MÉTODOS: a investigação, de caráter qualitativo, teve como participantes, pais ou responsáveis de crianças atendidas no Estágio de Leitura/Escrita do curso de Fonoaudiologia de uma universidade pública. Para o levantamento sociodemográfico realizaram-se consultas a prontuários destas crianças além de entrevistas semiestruturadas a partir de um roteiro enfocando os hábitos culturais e familiares relativos à linguagem escrita. RESULTADOS: o estudo revelou que os familiares entrevistados eram na maioria de baixa renda, baixa escolaridade, provenientes de ambientes culturais de pouca valorização e estímulo ao uso da leitura e escrita, podendo repercutir no desempenho escolar de seus filhos. CONCLUSÃO: a carência socioeconômica e cultural observada no estudo pode ser minimizada através do apoio de redes sociais comunitárias e de políticas publicas de cultura e educação, visto que há interesse e expectativa das famílias na melhoria da educação de seus filhos. .

PURPOSES: verifying the influence of social-familial factors in the children's process of written language acquisition while attending speech therapy, and learning about their families' sociocultural profile. METHODS: this qualitative research has, as subjects, parents or guardians of children enrolled in the reading/writing training of the Speech-Language Pathology course of a public university. For the demographic survey, consultations to the children's records were done, as also semi-structured interviews based on a guide that focused the cultural and family habits related to written language. RESULTS: the study showed that the interviewed families were mostly poor, with poor education, and came from cultural environments with little valorisation and encouragement for reading and writing, and this might have consequences in the academic performance of their children. CONCLUSION: the socioeconomic and cultural deficiency observed in the study can be minimized through the support of social community network and investments in culture and education, since there is interest and expectation of the families in the education of their children. .

Ultrassonografia e deglutição: revisão crítica da literatura / Ultrasonography and swallowing: a critical review of the literature

Objetivo Identificar como a função da deglutição tem sido avaliada por meio da ultrassonografia (USG). Estratégia de pesquisa Esta revisão da literatura levantou publicações científicas internacionais sobre a USG e seu uso na avaliação da deglutição, por meio da base de dados PubMed. Foi realizada a localização e seleção dos estudos através de levantamento de textos publicados sobre o assunto, no período de janeiro de 2002 a agosto de 2013, limitando-se a estudos em seres humanos, no idioma inglês. Critérios de seleção Foram excluídos aqueles repetidos por sobreposição das palavras-chave, estudos de caso, revisões de literatura, cartas ao editor e os não relacionados diretamente à temática. Resultados Foram identificados 17 estudos que corresponderam aos critérios de inclusão. Observou-se que mais da metade dos estudos avaliou a deglutição de indivíduos adultos saudáveis, sem preferência por nenhum dos gêneros. Os parâmetros adotados para a análise das imagens não foram unânimes, havendo variação considerável entre os estudos. Conclusão A USG da deglutição demonstrou ser um método rápido, não invasivo, de baixo custo, que fornece parâmetros objetivos sobre a deglutição e que pode ser realizado em beira de leito, uma vez que o equipamento costuma ser de fácil manuseio e transporte. .

Purpose To identify how the deglutition function has been evaluated using ultrasound (US). Research strategy This literature review used the PubMed database to survey international scientific publications about US and its use to evaluate deglutition. Studies were located and selected by surveying relevant articles published between January 2002 and August 2013. The survey was limited to studies on humans published in English. Selection criteria Repeated studies (determined by overlapping keywords), case studies, literature reviews, letters to the editor and studies not directly related to the topic were excluded. Results A total of 17 studies matching the inclusion criteria were identified. More than half of the studies evaluated the deglutition of healthy adults with no preference for gender. The parameters adopted for image analysis were not unanimous, and there was considerable variation among studies. Conclusion US proved to be a fast, non-invasive, low-cost method for evaluating objective parameters of deglutition. As a further advantage, US may be performed at bedside because the equipment is typically easy to handle and transport. .

Antiprotozoal activity of quinonemethide triterpenes from Maytenus ilicifolia (Celastraceae).

The present study describes the leishmanicidal and trypanocidal activities of two quinonemethide triterpenes, maytenin (1) and pristimerin (2), isolated from Maytenus ilicifolia root barks (Celastraceae). The compounds were effective against the Trypanosomatidae Leishmania amazonensis and Leishmania chagasi and Trypanosoma cruzi, etiologic agents of leishmaniasis and Chagas' disease, respectively. The quinonemethide triterpenes 1 and 2 exhibited a marked in vitro leishmanicidal activity against promastigotes and amastigotes with 50% inhibitory concentration (IC(50)) values of less than 0.88 nM. Both compounds showed IC(50) lower than 0.3 nM against Trypanosoma cruzi epimastigotes. The selectivity indexes (SI) based on BALB/c macrophages for L. amazonensis and L. chagasi were 243.65 and 46.61 for (1) and 193.63 and 23.85 for (2) indicating that both compounds presented high selectivity for Leishmania sp. The data here presented suggests that these compounds should be considered in the development of new and more potent drugs for the treatment of leishmaniasis and Chagas' disease.