BackgroundSeveral species of protozoa cause acute or chronic gastroenteritis in humans, worldwide. The burden of disease is particularly high among children living in developing areas of the world, where transmission is favored by lower hygienic standards and scarce availability of safe water. However, asymptomatic infection and polyparasitism are also commonly observed in poor settings. Here, we investigated the prevalence of intestinal protozoa in two small fishing villages, Porto Said (PS) and Santa Maria da Serra (SM), situated along the river Tietê in the State of São Paolo, Brazil. The villages lack basic public infrastructure and services, such as roads, public water supply, electricity and public health services.MethodsMultiple fecal samples were collected from 88 individuals in PS and from 38 individuals in SM, who were asymptomatic at the time of sampling and had no recent history of diarrheal disease. To gain insights into potential transmission routes, 49 dog fecal samples (38 from PS and 11 from SM) and 28 river water samples were also collected. All samples were tested by microscopy and PCR was used to genotype Giardia duodenalis, Blastocystis sp., Dientamoeba fragilis and Cryptosporidium spp.ResultsBy molecular methods, the most common human parasite was Blastocystis sp. (prevalence, 45% in PS and 71% in SM), followed by D. fragilis (13.6% in PS, and 18.4% in SM) and G. duodenalis (18.2% in PS and 7.9% in SM); Cryptosporidium spp. were not detected. Sequence analysis revealed large genetic variation among Blastocystis samples, with subtypes (STs) 1 and 3 being predominant, and with the notable absence of ST4. Among G. duodenalis samples, assemblages A and B were detected in humans, whereas assemblages A, C and D were found in dogs. Finally, all D. fragilis samples from humans were genotype 1. A single dog was found infected with Cryptosporidium canis. River water samples were negative for the investigated parasites.ConclusionsThis study showed a high carriage of intestinal parasites in asymptomatic individuals from two poor Brazilian villages, and highlighted a large genetic variability of Blastocystis spp. and G. duodenalis.

Objective: to analyze the relationship between the level of frailty and sociodemographic and health characteristics among elderly residents of a long-term care facility (LTCF) in Ribeirão Preto, São Paulo, Brazil. Method: this descriptive and cross-sectional study included 56 elderly persons living in a LTCF. Data were collected from April to June 2016. A questionnaire addressing sociodemographic and health profiles was used together with the Mini-Mental State Examination, the Tilburg Frailty Indicator, the Barthel Index, and the Geriatric Depression Scale (GDS-15). Descriptive statistics were applied. The normality of the continuous variables was tested using the Shapiro-Wilk test. Spearman’s correlation was used for the continuous variables with frailty as the dependent variable. Result: Most elderly individuals were female (57.1%); the average age was 77.77; and 35.7% were widowed. In terms of health, 55.4% presented cognitive deficit; 62.5% had depression symptoms; 75.0% were considered frail; 42.9% had suffered falls in the last 12 months; and the individuals scored an average of 68.30 in the Barthel Index. A positive correlation between the frailty score and the GDS-15 (r=0.538; p=0.00) was observed, while a negative correlation was found between frailty and the Barthel Index (r=-0.302; p=0.02). Conclusion: increased frailty among institutionalized elderly persons is correlated with the presence of depressive symptoms and inferior performance of basic activities of daily living. The results of the present study can support the planning of care provided to elderly individuals living in LTCFs and encourage broader assessments of these individuals.

In this work, the removal of reactive blue 5G (RB5G) dye using the drying biomass of banana pseudostem (BPS) was investigated. The characterization of BPS particles was performed. Improvement in the RB5G dye removal performance at the following sorption conditions was evidenced: pH 1, 30°C sorption temperature and 40 rpm shaking, regardless of the particle size range. Kinetic RB5G dye sorption data obtained at better conditions fit well in an Elovich model. A combined Langmuir-BET isotherm model provides a good representation of the RB5G dye equilibrium sorption data, which shows the evidence of a physical sorption process on the BPS surface. Based on the results, the removal of RB5G dye molecules by BPS is based on a physical sorption process.

Auditory Neuropathy Spectrum Disorder (ANSD) is characterized by a difficulty in establishing verbal behavior in the speaker and listener modalities due to an asynchrony in the nervous conduction of sound stimuli, leading to hearing loss. Cochlear implants are an alternative that stabilizes sound detection; however, discriminating and recognizing what is heard and establishing relations to speech requires learning. A procedure with recognized efficacy in establishing verbal repertoires in children with little or no language is Multiple Exemplar Instruction (MEI). The objective of this study was to verify replicability of results obtained from MEI with other populations for teaching and integrating listener and speaker behaviors on a six year-old child with ANSD and bilateral cochlear implants. The study was conducted with three sets of stimuli and consisted in a rotated presentation of listener responses, based on figure selection from dictated words, and of speaker responses, after a dictated word (echoic) and figure naming (tact). Repeated probes evaluated performance on the set of stimuli. Even though there is some variability in responding, selection responses were established first and speaker responses occurred gradually throughout successive sessions. The conditions under which a speaker's repertoire may be refined, and generalization of these results to other participants with ANSD should be further investigated. Keywords: Language; Hearing Impaired Persons; Cochlear Implant; Teaching RESUMO A Desordem do Espectro da Neuropatia Auditiva (DENA) é caracterizada pela dificuldade no estabelecimento do comportamento verbal nas modalidades de ouvinte e de falante, por uma dessincronia na condução nervosa da estimulação sonora recebida, ocasionando perdas auditivas. O implante coclear tem sido uma alternativa que estabiliza a detecção sonora, porém, discriminar e reconhecer o que se ouve e estabelecer relações com a fala irá requerer aprendizagem. Um procedimento de reconhecida eficácia no estabelecimento de repertórios verbais em crianças com pouca ou nenhuma linguagem é o Multiple Exemplar Instruction (MEI). O objetivo deste estudo foi verificar a replicabilidade dos resultados obtidos com o MEI com outras populações no ensino e integração entre os repertórios de ouvir e de falar em uma criança de seis anos com DENA e implante coclear bilateral. O ensino foi conduzido com três conjuntos de estímulos, e consistiu na apresentação rotativa de respostas de ouvinte, baseadas na seleção de figuras mediante palavra ditada e, de falante, após uma palavra ditada (ecoico) e mediante a nomeação de uma figura (tato). Repetidas sondas avaliaram o desempenho nos conjuntos de estímulos. Ainda que com alguma variabilidade no responder, as respostas de seleção foram estabelecidas primeiro e as respostas de falante, gradativamente, ao longo de sucessivas sessões. As condições sob as quais o repertório de falante pode ser refinado e a generalização dos resultados para outros participantes com DENA devem ser investigadas.

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In this work, the mechanism of the Cr(III) sorption by Salvinia auriculata biosorbent was studied in two stages. To understand the influence of the sorption parameters on the Cr(III) uptake, preliminary tests were performed. First, S. auriculata biomass was separately treated with base and acid solutions. Second, acid and base treatment of samples was performed based on the knowledge data base of our group. It was achieved a higher Cr(III) sorption capacity above 15 mg g-1 as associated to an increase of the micro-pores specific area and biosorbent volume. The obtained kinetic data of raw and treated biosorbents were well described by the intra-particle diffusion model. In this model, Cr(III) adsorption onto treated biomass is progressively improved with appearing of different mass transfer zones from out layer up to micro-porous layers. The equilibrium data of raw biomass were best described by the Langmuir isotherm, whereas the equilibrium data of the treated biomass were best fit by a combination of both Langmuir and Dubinin-Radushkevich isotherms. At low concentrations the adsorption most likely occurred on the outer monolayer, as proposed by the Langmuir model, followed by the adsorption on the micro-porous layers, as validated by the Dubinin-Radushkevich isotherm.