TABLE 6 .

Primers used in this study

Primer	Sequence (5′→3′)	Application
exbD del-F	GTCATGGCAATGCGTCTTAACGAGAACCTGTGTGTAGGCTGGAGCTGCTTC	exbD deletion
exbD del-R	CTTACCCGGCCTACAGCGTCAGCAGAATACCATATGAATATCCTCCTTA	exbD deletion
exbD-check-F	TGCAAATTTCCGGCGGTCAAA	exbD deletion confirmation
exbD-check-R	TATTGCGCAAACGCAGACCA	exbD deletion confirmation
exbD-F	TATTTCGCTTTCGCGGTCTCTTCG	exbD real-time PCR
exbD-R	CGGTGAAAGCGGATAACACCATGT	exbD real-time PCR
tonB del-F	GGTTTTTCAACTGAAACGATTATGACTTCATGTGTAGGCTGGAGCTGCTTC	tonB deletion
tonB del-R	TGGTATATTCCTGGCTGGCGGCGCCAGAGACATATGAATATCCTCCTTA	tonB deletion
tonB -check-F	CCGCTATCGGCAATGCCTTATT	tonB deletion confirmation
tonB-check-R	TGGCGATGTCGTATGCTGCTAC	tonB deletion confirmation
tonB-F	TTCACCTTTACGCGGCCTTCAATA	tonB real-time PCR
tonB-R	AAAGGTTGAAGAGCAGCCGAAGC	tonB real-time PCR
gyrB-F	CGGGTTCATTTCACCCAGACCTTT	Real-time PCR internal control
gyrB-R	TACGCATGGCGTGGATACCGATTA	Real-time PCR internal control