Correlation Engine 2.0
Clear Search sequence regions

Sizes of these terms reflect their relevance to your search.

In this study we assessed the use of acridine orange as an alternative to optical density to quantify the growth of Lactobacillus bulgaricus ATCC 7517. The growth of bacteria in Lactobacillus de Man Rogosa Sharpe (MRS) medium was measured by both acridine orange (AO) and optical density (OD) measurements for 24 h. The relationship between both methods was compared via correlation analysis. The doubling time of bacteria based on the values of OD600 and AO obtained during 24 h growth were also calculated. The result shows strong correlation of cell growth between OD600 and AO during the first 10 hours of growth, but the correlation was less strong when analyzing the data from 0 to 24 hours. Growth rates, generation time and lag time were also similar. This study indicates that AO could be used in place of OD to prepare growth curves of Lactobacillus bulgaricus during the exponential phase of growth, and to compare growth rates, generation times or lag times.


Dolar Pak, Ok Kyung Koo, Robert S Story, Corliss A O'Bryan, Philip G Crandall, Sun-Ok Lee, Steven C Ricke. Acridine orange as an alternative to optical density to study growth kinetics of Lactobacillus bulgaricus ATCC 7517. Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes. 2013;48(6):512-5

Expand section icon Mesh Tags

Expand section icon Substances

PMID: 23452217

View Full Text