Efecto de las condiciones ambientales en la formación in vitro de biopelículas de Klebsiella pneumoniae

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J. Carlos Mendoza-Hernández

Resumen

El objetivo del estudio fue determinar las características topográficas de la cinética de formación de las biopelículas y la cinética de formación de las mismas por Klebsiella pneumoniae bajo diferentes condiciones de pH y temperatura. Para observar la formación de las biopelículas se utilizó caldo Luria-Bertani en las placas lab-Tek II, incubadas a 35°C durante 4, 8, 12 o 24 h para la cinética, a 25 y 44°C durante 24 h para las variaciones de temperatura, a pH 6.4 o 7.4 durante 24 h para la variación de pH. Posteriormente, se hizo el análisis de las biopelículas mediante el microscopio de fuerza atómica. El análisis topográfico de la formación de biopelículas muestra la formación de una monocapa a las 4 h, la segregación de una sustancia polimérica extracelular a las 8 h, y la formación de una biopelícula madura, con la presencia de canales de agua, a las 24 h. Cuando se comparó el volumen, área y perímetro de los valles y los canales de agua, se encontró una diferencia significativa (p<0.05) entre 4 y 8 h en las áreas de los canales de agua. Considerando los parámetros de pH y temperatura, se observó una distribución homogénea a los 25 °C y44 °C, y heterogénea a 35 °C, mientras que a pH de 6.4 y 7.4 las biopelículas fueron totalmente heterogéneas. En ambos parámetros, se encontró un número diferente de canales de agua, pero sin que hubiera una diferencia significativa.

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Mendoza-Hernández, J. C. (2008). Efecto de las condiciones ambientales en la formación in vitro de biopelículas de Klebsiella pneumoniae. Revista Latinoamericana De Recursos Naturales, 4(1), 3-16. Recuperado a partir de https://revista.itson.edu.mx/index.php/rlrn/article/view/98
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