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Polymerase chain reaction products shown on agarose gel. L1, deoxyribonucleic acid (DNA) size marker 100-bp; lane 2, pyelonephritis associated pili (328 bp), lane 4, S fimbrial adhesion (410 bp), lane 6, A fimbrial adhesion (750 bp); L2, DNA size marker 100-bp; and lanes 3, 5, 7, control negatives
