Phenotypic and genotypic assessment of iron acquisition in diverse bovine-associated non-aureus staphylococcal strains

Table 1 Linear mixed regression model for the area under the curve (AUC) of the phenotypical iron assay

	β^a	SE^b	LSM^c	P^d
Intercept	9.23	0.42		< 0.001^e
Medium				< 0.001^d
TSB	Ref.^e	–	7.45	–
dTSB	−1.21	0.57	4.35	< 0.001^e
dTSBF	− 1.13	0.57	5.71	< 0.001^e
dTSBL	0.14	0.57	4.80	< 0.001^e
Strain				< 0.001^d
S. aureus ATCC 25923	Ref.	–	8.58	–
S. chromogenes IM^f	1.27	0.57	8.55	0.92^e
S. chromogenes TA^g	−0.61	0.57	4.47	< 0.001^e
S. chromogenes from CCM^h	−1.23	0.49	5.00	< 0.001^e
S. chromogenes from BTMⁱ	−2.75	0.49	4.79	< 0.001^e
S. equorum from CCM^j	−4.25	0.49	3.51	< 0.001^e
S. equorum from BTM^k	−4.17	0.49	4.15	< 0.001^e
Medium * Strain^l				< 0.001^d

^aRegression coefficient.
^bStandard error.
^cLeast square means.
^dOverall P-value for fixed effect.
^eP-value for differences of least square means.
^fStaphylococcus chromogenes isolate causing chronic intramammary infection [39].
^gStaphylococcus chromogenes isolate from a teat apex of a heifer [40].
^hStaphylococcus chromogones isolate from composite cow milk [41].
^IStaphylococcus chromogones isolate from bulk tank milk [41].
^jStaphylococcus equorum isolate from composite cow milk [41].
^kStaphylococcus equorum isolate from bulk tank milk [41].
^lInteraction medium * strain; see Figure 1.

ISSN: 1297-9716