3 resultados para Viral vaccines

em Repositório Científico da Universidade de Évora - Portugal


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Durante os últimos anos tem sido preocupação dos fisioterapeutas conduzir a investigação para melhorar a eficácia, eficiência e efectividade dos tratamentos que prestam e que conduzam aos melhores resultados possíveis, com base na melhor evidência científica disponível. Esta investigação tinha como objectivo principal perceber qual o contributo que a Gestão da Qualidade dá às práticas em fisioterapia, investigar quais as barreiras e obstáculos, que os fisioterapeutas percepcionam na implementação da prática baseada na evidência na sua prática clínica e examinar as atitudes perante a investigação em fisioterapia. A amostra foi constituída por treze fisioterapeutas e a recolha dos dados feita através de uma entrevista semi-estruturada. Verificou-se que no geral, os fisioterapeutas, revelam atitudes e comportamentos positivos relativos à Prática Baseada na Evidência, tendo ainda dificuldade em usá-la a seu favor. Constatou-se que os principais obstáculos á implementação da Prática Baseada na Evidência são de ordem individual, institucional e organizacional. Sendo que o maior obstáculo se prende com a existência de recursos disponíveis para acesso à informação. /ABSTRACT: During the last years it’s been the physical therapists concern to lead the research to improve efficacy, efficiency e effectiveness of treatments which they provide and that they lead to the best achievable results, based in the best scientific evidence available. This research had as its main goal, understand what contribute does the quality management give to the physiotherapy practice, discover which barriers and obstacles are perceived, by the physical therapists, in the evidence-based practice implementation and analyze their attitudes and behavior towards physiotherapy research. The sample was formed by thirteen physical therapists and the data was collected by a semi- structured interview. The results showed that generally, the physical therapists demonstrated positive attitude and behavior regarding Evidence-Based Practice having, nevertheless, difficulties using it in their profit and benefit. The study revealed that the principle obstacles perceived, in the implementation of Evidence-Based Practice are of individual, institutional and organizational order. The biggest obstacle perceived is the availability of resources to achieve information.

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Colibacillosis is a rather important economic problem for poultry production, associated to Avian Pathogenic Escherichia coli (APEC) strains, which may cause several extraintestinal pathologies, such as airsacculitis and cellulitis in broiler chickens, and salpingitis and peritonitis in broiler breeders, leading to septicemic mortality. Control of morbidity and mortality in the outbrakes of colibacillosis may be performed with antibiotics and/or by vaccination. The use antibiotics is frequently inef - fective as Escherichia coli ( E. coli ) is considered the largest reservoir of antimicrobial resistance, characteristic that may even transmit to other bacteria, turning the situation into a serious problem of public health. Vaccination may be the alternative solution but as many different strains arise, flock-specific autovaccines seem to be needed under several possible protocols, with live attenuated and/or inactivated vaccines from different strains that should be identified and characterized according to their virulence factors, within different flocks.

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Molecular methods are fundamental tools for the diagnosis of viral infections. While interpretation of results is straightforward for unvaccinated animals, where positivity represents ongoing or past infections, the presence of vaccine virus in the tissues of recently vaccinated animals may mislead diagnosis. In this study, we investigated the interference of RHDV2 vaccination in the results of a RT-qPCR for RHDV2 detection, and possible associations between mean Cq values of five animal groups differing in age, vaccination status and origin (domestic/wild). Viral sequences from vaccinated rabbits that died of RHDV2 infection (n = 14) were compared with the sequences from the commercial vaccines used in those animals. Group Cq means were compared through Independent t-test and One-way ANOVA. We proved that RHDV2 vaccine-RNA is not detected by the RT-qPCR as early as 15 days post- vaccination, an important fact in assisting results interpretation for diagnosis. Cq values of vaccinated and non-vaccinated infected domestic adults showed a statistically significant difference (p < 0.05), demonstrating that vaccination-induced immunity reduces viral loads and delays disease progression. Contrarily, in vaccinated young rabbits higher viral loads were registered compared to non-vaccinated kittens. No significant variation (p = 0.3824) was observed between viral loads of non- vaccinated domestic and wild RHDV2-victimised rabbits. Although the reduced number of vaccinated young animals analysed hampered a robust statistical analysis, this occurrence suggests that passively acquired maternal antibodies may inhibit the active immune response to vaccination, delaying protection and favouring disease progression. Our finding emphasises the importance of adapting kitten RHDV2 vaccination schedules to circumvent this interference phenomenon.