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Agarose gel analysis of polymerase chain reaction (PCR) products: Gel A (Dengue virus [DENV] reverse transcription [RT]-PCR) and B (Flavivirus RT-PCR) Lane 1: 100-bp ladder; Lanes 2–8: patients samples; Lane 9: no template water control; Lane 10: negative control tissue; Lane 11: positive control. Note negative DENV PCR result in lane 4 of gel A. The same case sample was positive by flavivirus PCR as shown in lane 4 of gel B.
