Table 4.

Comparison of resistance to heavy metal-encoding genes between neonatal (Neo) and adult (A) Staphylococcus haemolyticus strains and according to neonatal isolates sequence type (ST).

Resistance to heavy metals associated genes	All strains (n = 53)	Neonatal strains (n = 48)	Adult strains (n = 5)	p-value Neo vs A	ST 29 neonatal strains (n = 40)	ST 25 neonatal strains (n = 2)	ST 1 neonatal strains (n = 6)	p-value ST29 vs others
copZ	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
copA	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
copB	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
csoR	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
czrB	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
czrA_2	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
czrA	46 (86.8%)	41 (85.4%)	5 (100%)	0.824	39 (97.5%)	2 (100%)	0 (0%)	<0.001***
arsB_1	50 (94.3%)	45 (93.8%)	5 (100%)	1	37 (92.5%)	2 (100%)	6 (100%)	0.726
arsB_2	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
arsB_3	50 (94.3%)	45 (93.8%)	5 (100%)	1	37 (92.5%)	2 (100%)	6 (100%)	0.726
arsC_1	50 (94.3%)	45 (93.8%)	5 (100%)	1	37 (92.5%)	2 (100%)	6 (100%)	0.726
arsC_2	47 (88.7%)	42 (87.5%)	5 (100%)	0.922	40 (100%)	2 (100%)	0 (0%)	<0.001***
arsR_1	53 (100%)	48 (100%)	5 (100%)	1	40 (100%)	2 (100%)	6 (100%)	1
arsR_2	53 (100%)	48 (100%)	5 (100%)	ND	40 (100%)	2 (100%)	6 (100%)	ND
cadD_2	44 (83%)	40 (83.3%)	4 (80%)	1	40 (100%)	0 (0%)	0 (0%)	<0.001***
czcD	44 (83%)	40 (83.3%)	4 (80%)	1	40 (100%)	0 (0%)	0 (0%)	<0.001***
cadD_1	34 (64.2%)	32 (66.7%)	2 (40%)	0.488	32 (80%)	0 (0%)	0 (0%)	<0.001***
cadD_3	31 (58.5%)	29 (60.4%)	2 (80%)	0.685	29 (72.5%)	0 (0%)	0 (0%)	<0.001***
cadD	3 (5.7%)	2 (4.2%)	1 (20%)	0.659	0 (0%)	2 (100%)	0 (0%)	<0.001***

***, p-value < 0.001; ND, not determined.