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Gel electrophoresis of 16S rDNA, toxin A, B and CDT genes. The PCR products were mixed and run to show toxin-producing isolates of C.difficile. Lane 1: DNA Ladder (100 bp), Lanes 2 & 3: C. difficile A+/B+/CDT+, Lane 4: C. difficile A+/B+/CDT- (ATCC 9689), Lane 5: clinically isolated C. difficile A+/B+/CDT- Line 6: C. difficile A+/B-/CDT-, Lane 7: C. difficile A-/B-/CDT, Lane 8: Negative Control
