Fig. 7From: Rapid detection of Escherichia coli in beverages using genetically engineered bacteriophage T7Signal to noise ratio of Alkaline phosphatase over-expressed by E. coli BL21 after 4 h of enrichment in TSB (a), coconut water (b), and apple juice (c) after infection with phage T7-ALP for 30 min. Asterisk indicates significant difference (P < 0.05) from negative control. Error bars indicate ± standard deviation of meansBack to article page