The Bacillus Calmette-Guérin (BCG) vaccine, which is widely used to protect children against tuberculosis, can also improve immune response against viral infections. This unicentric, randomized-controlled clinical trial assessed the efficacy and safety of revaccination with BCG Moscow in reducing the positivity and symptoms of COVID-19 in health care workers (HCWs) during the COVID-19 pandemic. HCWs who had negative COVID-19 IgM and IgG and who dedicated at least eight hours per week in facilities that attended to individuals suspected of having COVID-19 were included in the study and were followed for 7, 15, 30, 60, and 180 days by telemedicine. The HCWs were randomly allocated to a revaccinated with BCG group, which received the BCG vaccine, or an unvaccinated group. Revaccination with BCG Moscow was found to be safe, and its efficacy ranged from 30.0% (95.0%CI -78.0 to 72.0%) to 31.0% (95.0%CI -74.0 to 74.0%). Mycobacterium bovis BCG Moscow did not induce NK cell activation at 15–20 days post-revaccination. As hypothesized, revaccination with BCG Moscow was associated with a lower incidence of COVID-19 positivity, though the results did not reach statistical significance. Further studies should be carried out to assess whether revaccination with BCG is able to protect HCWs against COVID-19. The protocol of this clinical trial was registered on August 5th, 2020, at REBEC (Registro Brasileiro de Ensaios Clínicos, RBR-4kjqtg - ensaiosclinicos.gov.br/rg/RBR-4kjqtg/1) and the WHO (# U1111-1256-3892). The clinical trial protocol was approved by the Comissão Nacional de ética de pesquisa- CONEP (CAAE 31783720.0.0000.5078).
The significant number of people with latent and active tuberculosis infection requires further efforts to develop new vaccines or improve the Bacillus Calmette-Guérin (BCG), which is the only approved vaccine against this disease. In this study, we developed a recombinant fusion protein (PEPf) containing high-density immunodominant epitope sequences from Rv0125, Rv2467, and Rv2672 Mycobacterium tuberculosis (Mtb) proteases that proved immunogenic and used it to develop a recombinant BCG vaccine expressing the fusion protein. After challenging using Mtb, a specific immune response was recalled, resulting in a reduced lung bacterial load with similar protective capabilities to BCG. Thus BCG PEPf failed to increase the protection conferred by BCG. The PEPf was combined with Advax4 adjuvant and tested as a subunit vaccine using a prime-boost strategy. PEPf + Advax4 significantly improved protection after Mtb challenge, with a reduction in bacterial load in the lungs. Our results confirm that Mtb proteases can be used to develop vaccines against tuberculosis and that the use of the recombinant PEPf subunit protein following a prime-boost regimen is a promising strategy to improve BCG immunity.
A 3ª edição do Congresso Internacional de Estudantes e Profissionais da Saúde – DELTA SAÚDE, realizou-se de forma presencial no período de 04 a 06 de novembro de 2022, no Centro de Convenções do Hotel SESC Praia, Luis Correia, Piauí. O Delta Saúde 2022 trouxe como tema geral: “O pós-pandemia e os principais desafios da saúde global”; e as discussões foram norteadas pelos eixos centrais, a saber: a) Pandemia de COVID-19, b) Vigilância em Saúde, c) Saúde Pública e a Atenção Primária, d) Saúde Mental, e) Doenças Crônicas e Doenças Transmissíveis, f) Educação, Formação e Trabalho na Saúde, g) Inovação em Saúde, h) Eixos Transversais. O evento foi criado em 2017 e nesta edição alcançamos pelo menos 10 estados brasileiros em participação direta, palestrantes, convidados, além dos conferencistas internacionais on-line. Esta diversidade aliada a qualidade dos trabalhos apresentados, contribuiu de forma decisiva para o alcance dos objetivos do congresso que primam pela qualificação do ensino na saúde de acadêmicos e pósgraduandos, pelo fortalecimento das práticas profissionais nos serviços de saúde, e pelo incentivo à produção científica. A programação do evento foi composta por palestras nacionais e internacionais, mesas multidisciplinares, cursos livres, seminários, rodas de conversas, encontros e sessões de trabalhos com apresentações nas modalidades: Comunicações Orais e Pôsteres; e com publicação das pesquisas científicas nos Anais do congresso. O evento contou com 692 inscritos, e destes 42 foram palestrantes que abrilhantaram a programação do congresso. Recebemos 746 resumos para avaliação, e foram apresentados presencialmente 536 trabalhos, sendo 42 premiados com menção honrosa. O evento foi idealizado pela Sociedade Delta Científica e SBCSaúde, teve o apoio do SESC-PI e da Doity, além do apoio científico da FIOCRUZ Piauí, da Editora Pasteur, dos núcleos de pesquisa NUPCelt/UFPI, NAPsiTO/UFPI/UFDPar e NPPM/UFPI; e dos programas de residência multiprofissional RMSFC/UESPI e PRMSF/UFPI/UFDPar. O evento também contou com a parceria de empresas patrocinadoras e expositoras, que tiveram da Comissão Organizadora reciprocidade em suas demandas, a saber: Instituto UniEducacional, WM Saúde e The Nutri Store/PACCO.
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