Figure 3. Pictures of the different agarose gels of the PCR products.

M, molecular marker; The numbers represent different samples negative or positive for the gene considered and do not refer to the same samples on different gels. (A) PCR products of tcdA(1, negative sample; 3, positive sample) and tcdB(2 and 4, positive samples) gene; (B) PCR products of the tpi gene indicating the presence of C. difficile; (C) 16S r RNA gene PCR products.