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Comparison between CFU counts and real-time PCR detection of Salmonella serovar Typhimurium DSM554 in water samples from loam A. CFU/ml was determined by plating on a selective agar, and the amount of invA DNA/ml was determined from DNA extracts of a dilution series of a Salmonella strain. Each point represents the mean of triplicate quantifications from one sample; error bars indicate ± the standard deviations.
