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Sample amplification of stools containing or not containing E. histolytica and E. dispar with IC. Lanes 1 and 10, marker (ΦX174 RF/HaeIII fragments [Gibco BRL]: 1,353, 1,078, 872, 603, 310, 281/271, 234, 194, 118, and 72 bp); lanes 2 to 5, E. dispar amplification; lanes 2 and 5, negative samples; lanes 3 and 4, positive samples (lane 3, strong positive, no IC amplification); lanes 6 to 9, E. histolytica amplification; lanes 6, 7, and 9, negative samples; lane 8, positive sample.
