Table 2.

Collated biofilm assay results of invasive Salmonella tested in this study.

		Crystal violet assay
		(OD600)
Serovar	Strain	Mean	SD	rdar Phenotypea	Pellicle formationb
Typhimurium ST19	I77	0.86	0.20	+ + +	+ + +
	I89	1.30	0.65	+ + +	+ + +
	I41	0.71	0.22	+ + +	+ + +
	S52	1.56	0.28	+ + +	+ + +
	SL1344	0.58	0.21	+ + +	+ + +
Typhimurium ST313	Q55	0.35	0.18	+	+
	D65	0.27	0.14	+	+ +
	S11	0.31	0.10	+	+
	S12	0.33	0.21	+	+
	A13	0.30	0.14	+	+
	D70	0.31	0.14	+	+
	S42	0.22	0.14	+	+ +
	P142	0.24	0.10	+	+
	P104	0.22	0.15	+	+
	Q65	0.16	0.13	+	+
	S72	0.21	0.20	+	+ +
Typhi	W10	0.96	0.67	–	+
	W16	0.29	0.21	–	+
	W35	0.28	0.14	–	+ +
	W41	0.32	0.11	–	+ +
	A19	0.24	0.20	–	+
	Ty2	1.45	0.93	–	+
Paratyphi A	S39	0.37	0.18	–	+
	W30	0.27	0.15	–	+
	ATCC 9150	0.50	0.24	–	+ +

^ardar phenotype; +++, rdar morphology; ++, orange-rdar morphology; +, bas morphology; −, smooth and pale brown morphology.

^bPellicle formation; +++, strong pellicle; ++, moderate pellicle; + weak pellicle.