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Visual detection of four DENV serotypes using the novel mismatch-tolerant and the conventional RT-LAMP assays with HNB or cresol red. The reactions were performed at 63° for 50 min. The color changes from violet to azure for HNB and from burgundy to orange or yellow for cresol red were considered as positive (+). The results at 30, 40, and 60 min are shown in Supplementary Figure S2.
