Determinación de la actividad antibacteriana “in vitro” del aceite esencial de Luma chequen (Molina) A. Gray “arrayán” frente a Streptococcus mutans
Date
2014
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Publisher
Universidad Nacional Mayor de San Marcos
Abstract
El objetivo del presente estudio fue determinar la actividad antibacteriana del aceite esencial de Luma chequen (Molina) A. Gray “arrayan” frente a Streptococcus mutans. Se empleó el método de disco-difusión en agar. La cepa fue reactivada en placa de Tripticasa Soya Agar (TSA), incubada a 37 ºC por 24 horas en microaerofilia. Se tomaron 5 colonias y se transfirieron a un tubo de ensayo con 5 mL de caldo Müller-Hinton, incubada a 37 ºC por 6 horas en microaerofilia hasta obtener una turbidez equivalente al 0.5 de la escala de Mc Farland. El sembrado se realizó en 14 placas con agar Müller-Hinton mediante la técnica de difusión, utilizando el aceite esencial en concentraciones de 10, 50 y 100%, y se procedió a la incubación en microaerofilia a 37 ºC por 24 horas. El análisis estadístico se realizó con el programa STATA Versión 12. Las concentraciones al 10, 50 y 100% presentaron un halo de inhibición promedio de 6.28, 7.88 y 8.66 mm respectivamente, la diferencia de promedios entre estas tres concentraciones mostró diferencia estadísticamente significativa (P<0.05). Se concluye que las tres concentraciones del aceite esencial de Luma chequen (Molina) A. Gray “arrayan”, presentan actividad antibacteriana frente a Streptococcus mutans.
--- The aim of this study was to determine the antibacterial activity of the essential oil of Luma chequen (Molina) A. Gray “myrtle“ against Streptococcus mutans. The disk-diffusion method in agar was used. The strain was reactivated in Trypticase Soy agar plate (TSA), incubated at 37 °C for 24 hours in microaerophilic. 5 colonies were picked and transferred to a test tube with 5 mL of Mueller-Hinton broth, incubated at 37 °C for 6 hours under microaerophilic conditions until a turbidity equivalent to 0.5 Mc Farland scale. Seeding was performed on 14 plates with Mueller-Hinton agar by diffusion technique, using the essential oil in concentrations of 10, 50 and 100%, and the incubation proceeded in microaerophilic at 37 ºC for 24 hours. Statistical analysis was performed using STATA Version 12 program. Concentrations of 10, 50 and 100 % had a halo of inhibition average of 6.28, 7.88 and 8.66 mm respectively, the mean difference between these three concentrations showed statistically significant difference (P<0.05). We conclude that the three concentrations of the essential oil of Luma chequen (Molina) A. Gray “myrtle“, exhibit antibacterial activity against Streptococcus mutans. Keywords: Streptococcus mutans, myrtle, antibacterial activity.
--- The aim of this study was to determine the antibacterial activity of the essential oil of Luma chequen (Molina) A. Gray “myrtle“ against Streptococcus mutans. The disk-diffusion method in agar was used. The strain was reactivated in Trypticase Soy agar plate (TSA), incubated at 37 °C for 24 hours in microaerophilic. 5 colonies were picked and transferred to a test tube with 5 mL of Mueller-Hinton broth, incubated at 37 °C for 6 hours under microaerophilic conditions until a turbidity equivalent to 0.5 Mc Farland scale. Seeding was performed on 14 plates with Mueller-Hinton agar by diffusion technique, using the essential oil in concentrations of 10, 50 and 100%, and the incubation proceeded in microaerophilic at 37 ºC for 24 hours. Statistical analysis was performed using STATA Version 12 program. Concentrations of 10, 50 and 100 % had a halo of inhibition average of 6.28, 7.88 and 8.66 mm respectively, the mean difference between these three concentrations showed statistically significant difference (P<0.05). We conclude that the three concentrations of the essential oil of Luma chequen (Molina) A. Gray “myrtle“, exhibit antibacterial activity against Streptococcus mutans. Keywords: Streptococcus mutans, myrtle, antibacterial activity.
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Plantas endémicas - Región Andina, Materia médica vegetal - Perú, Caries dentales - Tratamiento, Boca - Infecciones