Control of cross-contamination between dental offices and prosthetic laboratories is of utmost importance to maintain the health of patients and dental office staff. The purpose of this study was to evaluate disinfection protocols, considering antimicrobial effectiveness and damage to the structures of prostheses. Solutions of 1% sodium hypochlorite, 2% chlorhexidine digluconate, 50% vinegar and sodium perborate were evaluated. Specimens were contaminated in vitro with standardized suspensions of Candida albicans, Streptococcus mutans, Escherichia coli, Staphylococcus aureus and Bacillus subtilis spores. Disinfection by immersion for 10 min was performed. Final counts of microorganisms were obtained using the plating method. Results were statistically compared by Kruskal-Wallis ANOVA and Dunn's test. The surface roughness of 40 specimens was analyzed before and after 10 disinfection cycles, and results were compared statistically using Student's t test. The solution of 50% vinegar was as effective as 1% sodium hypochlorite and 2% chlorhexidine against C. albicans, E. coli and S. mutans. The sodium perborate solution showed the lowest antimicrobial effectiveness. Superficial roughness increased after cycles in 1% sodium hypochlorite (p=0.02). Solutions of 1% sodium hypochlorite, 2% chlorhexidine and 50% vinegar were effective for the disinfection of heat-polymerized acrylic specimens. Sodium hypochlorite increased the superficial roughness.
OBJECTIVE: To investigate the effects of different sterilization/disinfection methods on the
mechanical properties of orthodontic elastomeric chains. METHODS: Segments of elastomeric chains with 5 links each were sent for sterilization by
cobalt 60 (Co60) (20 KGy) gamma ray technology. After the procedure, the
elastomeric chains were contaminated with clinical samples of
Streptococcus mutans. Subsequently, the elastomeric chains
were submitted to sterilization/disinfection tests carried out by means of
different methods, forming six study groups, as follows: Group 1 (control -
without contamination), Group 2 (70°GL alcohol), Group 3 (autoclave), Group 4
(ultraviolet), Group 5 (peracetic acid) and Group 6 (glutaraldehyde). After
sterilization/disinfection, the effectiveness of these methods, by Colony forming
units per mL (CFU/mL), and the mechanical properties of the material were
assessed. Student's t-test was used to assess the number of CFUs while ANOVA and
Tukey's test were used to assess elastic strength. RESULTS: Ultraviolet treatment was not completely effective for sterilization. No loss of
mechanical properties occurred with the use of the different sterilization methods
(p > 0.05). CONCLUSION: Biological control of elastomeric chains does not affect their mechanical
properties.
O dinheiro é talvez o artigo mais trocado por pessoas em todo o mundo servindo como reservatório de microrganismos que podem ser transmitidos entre a população. O objetivo do presente estudo foi analisar a contaminação das cédulas monetárias circulantes em feira livre do interior da Bahia por espécies de relevância clínica como as Enterobactérias, Staphylococcus spp. e espécies de Candida, além de analisar a contaminação geral. Foram coletadas amostras das superfícies de 50 cédulas em circulação na feira livre. As amostras foram identificadas e no laboratório foram agitadas obtendo-se uma suspensão inicial e a partir dessa foram realizadas diluições decimais que foram semeadas em duplicata em placas de Petri contendo os meios de cultura Ágar-sangue, Ágar Sabouraud dextrose com cloranfenicol, Ágar salgado manitol e Agar MacConkey. As placas foram incubadas a 37ºC/ 24h (5 dias a temperatura ambiente para crescimento de fungos). Os resultados obtidos em UFC/mL foram analisados pelo teste estatístico ANOVA (5%). Pôde-se concluir que nas cédulas monetárias foram coletadas amostras de todos os microrganismos de interesse no estudo e que existe necessidade de implementação de políticas públicas para minimização da contaminação das cédulas enfatizando os bons hábitos de higiene pessoal entre a população.
O objetivo do estudo foi relatar a construção de ações pela Universidade Federal da Bahia, Campus Anísio Teixeira, com o intuito de fortalecer a resposta ao enfrentamento a COVID-19 pelo município de Vitória da Conquista, Bahia. As ações compreenderam o reforço aos suprimentos de Equipamento de Proteção Individual (EPIs) e Coletiva (EPCs), implementação de artifícios de Biossegurança para a desinfecção, apoio a testagem e diagnóstico e apoio psicológico. O presente relato revelou que o apoio da Universidade Federal da Bahia, campus de Vitória da Conquista, no enfrentamento da pandemia, contribuiu de maneira significativa nas diversas ações supracitadas, ratificando a importância da universidade na comunidade.
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