Análise genômicae suscetibilidade de Pseudomonas aeruginosa isoladas de rede de água de consultórios odontológicos da cidade de Barretos-SP
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Data
2010-02-26
Autores
Oliveira, Ana Claudia de [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Foram estudadas 180 amostras de água de 45 consultórios odontológicos da cidade de Barretos-SP, com o objetivo de isolar, identificar, determinar a contagem de isolados de Pseudomonas aeruginosa UFC/mL, determinar o perfil clonal e avaliar a diversidade genômica dos isolados e a suscetibilidade das mesmas frente a diferentes antibióticos. As amostras de água foram filtradas em filtro Millipore® e a membrana colocada sobre o centro de uma placa de Petri contendo agar cetrimida, As colônias típicas de bactérias do gênero Pseudomonas foram identificadas pelo método de Gram, inoculação em TSI agar (Triple Sugar Iron), crescimento a 42ºC, produção de pigmento, produção de alginato, oxidase, motilidade e alcalinização da acetamida. O teste utilizado para análise genômica foi o ERIC-PCR. Dos 76 (42,2%) isolados de Pseudomonas aeruginosa, 15 eram provenientes das amostras de torneira de lavagem das mãos, 18 de reservatório de garrafa pet, 23 de seringa tríplice e 20 do motor de alta rotação. Todos os isolados de Pseudomonas aeruginosa foram submetidos ao teste de suscetibilidade segundo a técnica de Kirby- Bauer. Dos antibióticos testados o que apresentou melhor resultado quanto à sensibilidade (65,8%) foi a ciprofloxacina. Quanto à similaridade genética dos isolados dos diferentes pontos analisados, foram encontrados nove “clusters” de 100% de similaridade.
The biofilm found in water supplies and lines of hospitals and dental units is extremely important because it presents a large number of bacteria, leading to risk of infection in immunocompromised patients vulnerable to opportunistic pathogens such as the Pseudomonas aeruginosa. One hundred eighty water samples from dental units of the city of Barretos-SP were evaluated. The water samples filtered in Millipore® filter were incubated in plates containing Cetrimide ágar. The bacteria colonies were identified through the gram-staining test, inoculation in agar T.S.I (triple sugar Iron), growth at 42 ° C, pigment production, production of alginate, oxidase acetamide alkalization and motility observation. All Pseudomonas aeruginosa bacteria were submitted to the susceptibility test according to the Kirby-Bauer technique. The test used for genomic analysis was the ERIC-PCR. From the total microorganisms studied, 76 (42,2%) were positive for Pseudomonas aeruginosa, isolates from 180 water samples, where 15 strains were from hand washing incoming local water supplies, 18 from PET bottled water, 23 from 3-in-1 syringes and 20 from the high speed handpiece. In relation to the antibiotics tested, the one presenting the best result with regard to sensibility was ciprofloxacin with 65.8%. The genetic similarity of isolates from different points analyzed, there were nine clusters of 100% similarity.
The biofilm found in water supplies and lines of hospitals and dental units is extremely important because it presents a large number of bacteria, leading to risk of infection in immunocompromised patients vulnerable to opportunistic pathogens such as the Pseudomonas aeruginosa. One hundred eighty water samples from dental units of the city of Barretos-SP were evaluated. The water samples filtered in Millipore® filter were incubated in plates containing Cetrimide ágar. The bacteria colonies were identified through the gram-staining test, inoculation in agar T.S.I (triple sugar Iron), growth at 42 ° C, pigment production, production of alginate, oxidase acetamide alkalization and motility observation. All Pseudomonas aeruginosa bacteria were submitted to the susceptibility test according to the Kirby-Bauer technique. The test used for genomic analysis was the ERIC-PCR. From the total microorganisms studied, 76 (42,2%) were positive for Pseudomonas aeruginosa, isolates from 180 water samples, where 15 strains were from hand washing incoming local water supplies, 18 from PET bottled water, 23 from 3-in-1 syringes and 20 from the high speed handpiece. In relation to the antibiotics tested, the one presenting the best result with regard to sensibility was ciprofloxacin with 65.8%. The genetic similarity of isolates from different points analyzed, there were nine clusters of 100% similarity.
Descrição
Palavras-chave
Pseudomonas aeruginosa, Reservatórios, Biofilme, Pseudomonas aeruginosa, Biofilm, Dental units, Water line, Eric-PCR
Como citar
OLIVEIRA, Ana Claudia de. Análise genômicae suscetibilidade de Pseudomonas aeruginosa isoladas de rede de água de consultórios odontológicos da cidade de Barretos-SP. 2010. v, 51 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2010.