Table 1.

Primers used to detect sul genes.

Gene	Primer	Sequence (5′–3′)	Amplicon size (bp)	References
sul1	Sul1F Sul1R	GTATTGCGCCGCTCTTAGAC CCGACTTCAGCTTTTGAAGG	408	Rosser and Young, 1999
sul2	Sul2F Sul2R	GAATAAATCGETCATCATTTTCGC CGAATTCTTGCGGTTTCTTTCAGC	810	Grape et al., 2003
sul3	Sul3F Sul3R	GAGCAAGATTTTTGGAATCG CATCTGCAGCTAACCTAGGGCTTTGG	790	Perreten and Boerlin, 2003