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Analytical sensitivity of lateral flow dipstick test strip in detecting rPPDK spiked in a stool sample of healthy individual. Arrow indicates the position of the visible dot.
Notes: Lane 1: dipstick tested with non-spiked stool sample; Lanes 2–7: dipsticks tested with stool spiked with 0.001, 0.01, 0.1, 1, 10 and 100 μg ml-1 of rPPDK, respectively. The limit of detection of the dipstick was determined to be 0.1 μg ml−1 rPPDK.
