Table 1. Primers Sequence Used for Amplification cdd3, tcdB and tcdA Genes .

Gene	Primer	Nucleotide sequence	Fragment Length (bp)
Cdd-3	Tim6	5´ TCC AAT ATA ATA AAT TAG CAT TCC A 3´	622
	Struppi6	5´ GGC TAT TAC ACG TAA TCC AGA TA 3´
TcdA	TA1	5´ATG ATA AGG CAA CTT CAG TGG 3´	624
	TA2	5´TAA GTT CCT CCT GCT CCA TCA A 3´
TcdB	TB1	5´GAG CTG CTT CAA TTG GAG AGA 3´	412
	TB2	5´GTA ACC TAC TTT CAT AAC ACC AG 3´