A wide variety of opportunistic pathogens has been detected in the tubing supplying water to odontological equipment, in special in the biofilm lining of these tubes. Among these pathogens, Pseudomonas aeruginosa, one of the leading causes of nosocomial infections, is frequently found in water lines supplying dental units. In the present work, 160 samples of water, and 200 fomite samples from forty dental units were collected in the city of Barretos, State of São Paulo, Brazil and evaluated between January and July, 2005. Seventy-six P. aeruginosa strains, isolated from the dental environment (5 strains) and water system (71 strains), were tested for susceptibility to six antimicrobial drugs most frequently used against P. aeruginosa infections. Susceptibility to ciprofloxacin, followed by meropenem was the predominant profile. The need for effective means of reducing the microbial burden within dental unit water lines is emphasized, and the risk of exposure and cross-infection in dental practice, in special when caused by opportunistic pathogens like P. aeruginosa, are highlighted.

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Este jogo é uma alternativa à carência de metodologias práticas para o ensino de evolução no ensino médio e tem por objetivo ajudar no processo de ensinoaprendizagem dos conteúdos de extinção e irradiação de espécies. O jogo tem como objetivo simular o que ocorre na natureza de acordo com as condições ambientais e ecológicas que forçam as espécies a se dispersarem na tentativa de colonizar novos habitats e nichos. O conhecimento e a compreensão das interações entre os processos de extinção e irradiação é o grande propósito desta simulação.