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v. 2 n. 2 (2021): Edição Especial: Anais de Eventos
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Anais do I Congresso Nacional de Microbiologia Clínica On-Line
ESTUDO DA AÇÃO ANTIMICROBIANA DE NANOPARTÍCULAS DE PRATA OBTIDA POR REAÇÃO DE COMBUSTÃO EM DIFERENTES ESPÉCIES DE CÂNDIDA SP.
Autores
Alice Sperandio Porto
Elton Bill Amaral De Souza
Geyse Souza Santos
Anita Sperandio Porto
Judes Gonçalves Dos Santos
Palavras-chave:
ANTIMICROBIANO, COMBUSTÃO, NANOPARTÍCULAS, PRATA
Resumo
Introdução: Estudos na área nanobiotecnológica demonstraram que materiais, em diferentes escalas dimensionais, podem apresentar características físicas e químicas diferenciadas. As nanopartículas metálicas, sintetizadas de diferentes métodos, podem ser aplicadas em diferentes áreas como a medicina, veterinária, em especial, a área farmacêutica. As nanopartículas de prata (Ag-NPs) apresentam atividades antimicrobianas e podem ser obtidas por uma variedade de métodos químicos e físicos. Objetivos: O objetivo do presente estudo foi a obtenção de Ag-NPs pelo método da Reação de Combustão assistida via microondas e sua ação em cepas de três espécies de cândida, sendo elas: Cândida albicans , Cândida parapsilosis e Cândida tropicalis . Material e Métodos: Para a síntese de Ag-NPS foram utilizados como reagentes, o Nitrato de Prata (AgNO3) como agente oxidante a ureia ((NH₂)₂CO) como agente redutor em solução com água destilada. A composição da solução foi submetida a queima assistida em micro-ondas por aproximadamente 5 minutos. As Ag-NPs foram caracterizadas por Microscopia Eletrônica de Transmissão (MET) e Microscopia Eletrônica de Varredura (MEV) para estudos de morfologia e análise da dimensão do material obtido. Os ensaios para determinação da Concentração Inibitória Mínima (CIM), foram realizados utilizando a técnica de difusão em poços contidos nas placas com meio de cultura específico para leveduras, o ágar Sabouraud Dextrose. Foram utilizadas uma concentração de 20 µg /mL da solução de Ag-NPs adicionadas aos poços. Os ensaios da atividade antimicrobiana foram feitos em triplicata e comparado com o controle negativo (meio sem tratamento com Ag-NPs). Resultado: As microfotografias obtidas por MET e MEV constataram a obtenção de nanoestruturas com morfologia irregular, predominantemente, semi-esférica, e com dimensão variando entre 10 a 40 nanômetros. As Ag-NPs não apresentaram potencial antifúngico em relação as três espécies de Cândida estudadas, não sendo capazes de impedir o crescimento do fungo. Conclusão: Apesar de não apresentar efeito inibitório para as espécies de fungos escolhidas, novos ensaios devem ser realizados, utilizando diferentes técnicas de síntese de Ag-NPs e concentrações de agentes oxidantes e redutores diferentes, já que a associação de AgNO3 e (NH₂)₂CO como combustível, não apresentou eficácia quanto a inibição do halo de crescimento.
Como Citar
Porto, A. S. ., Souza, E. B. A. D. ., Santos, G. S. ., Porto, A. S. ., & Santos, J. G. D. . (2021). ESTUDO DA AÇÃO ANTIMICROBIANA DE NANOPARTÍCULAS DE PRATA OBTIDA POR REAÇÃO DE COMBUSTÃO EM DIFERENTES ESPÉCIES DE CÂNDIDA SP. Revista Multidisciplinar Em Saúde , 2 (2), 04. https://doi.org/10.51161/rems/1160
Seção
Anais do I Congresso Nacional de Microbiologia Clínica On-Line
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