TABLE 1.

Association between slime production on CRA and presence of icaA and icaD in Staphylococcus strains isolates from catheter infections and from mucosa and skin of healthy volunteers

Strain	No. of isolates	Origin of infection	Colony color at:		Slime production	icaA	icaD
			24 h	48 h
Reference
ATCC 35984 (RP62A)			Black	Almost black	Strong	+	+
ATCC 12228			Red	Red	No	−	−
S. epidermidis catheter isolates
1-9-14-20-22-55-60-P13-3561-7P-8P-22P-33P-35P-42AP-47P-49P-2ior-21	19	Catheter	Black	Black	Strong	+	+
13	1	Catheter	Black	Blacka	Strong	+	+
15-B-465-948-38P-52P-54P-58P-7ior-16-28-43-5P	13	Catheter	Almost black	Black	Strong	+	+
4-5-7-8-10-22ior-35ior-21-24-61-948-930-0B49-20P-21P-32P	16	Catheter	Red	Red	No	−	−
78ior-48P-45P-50P-44P	5	Catheter	Red	Deep red	No	−	−
2-11-23-462-470-3P-17P-23P-30P-31P-34P-40P-41P-46P	14	Catheter	Deep red	Deep red	No	−	−
S. aureus catheter isolates
3-7-13-14-19	4	Catheter	Black	Black	Strong	+	+
6	2	Catheter	Almost black	Black	Strong	+	+
9-15	2	Catheter	Black	Blacka	Strong	+	+
2-4	1	Catheter	Bordeaux	Black	Strong	+	+
1-17-20-23	5	Catheter	Bordeaux	Almost blackb	Strong	+	+
22	1	Catheter	Red	Deep red	No	−	−
10-12-16-21	4	Catheter	Deep red	Deep red	No	−	−
5-8-11-18	4	Catheter	Red	Red	No	−	−
S. epidermidis isolates from healthy volunteers
798-799-800-801-802-803	6	Mucosa	Deep red	Deep red	No	−	−
901-902-903-904	4	Skin	Deep red	Deep red	No	−	−

^aColonies that were black at 24 h but which exhibited tiny pink or red central spikes at 48 h. 

^bS. aureus colonies kept under further observation for up to 72 h before turning black.