Table 2.

Nucleotide sequences of PCR primers used for phylogenetic grouping of E. coli [21].

Gene	Primer sequence (5′-3′)	Amplicon size (bp)
chuA
F	GACGAACCAACGGTCAGGAT	279
R	TGCCGCCAGTACCAAAGACA
YjaA
F	TGAAGTGTCAGGAGACGCTG	211
R	ATGGAGAATGCGTTCCTCAAC
TspE4.C2
F	GAGTAATGTCGGGGCATTCA	152
R	CGCGCCAACAAAGTATTACG