Table 2.

Bacterial groups and PAH-ring hydroxylating dioxygenases specific primers.

Target	Primers	Annealing T  (°C)	PCR efficiency  (%)	Reference
All groups	p1/p2	60	93	[30]
Gram positive	PAH-RHDα GP F/R	54	97	[6]
Gram negative	PAH-RHDα GN F/R	57	94	[6]