Microbiological pattern of arterial catheters in the intensive care unit

Table 1 Comparison of the species richness, evenness, diversity of the 16S rRNA gene clones from two groups of ACs.

AC group (based on Maki's results)	Catheter numbers	Maki result	No. of clones	No. of OTUs ≥97%	Richness indices		Evenness index	Diversity index
					Chao	ACE		Shannon	Simpson
Uncolonised ACs	1	No-growth	31	18
	11	No-growth	24	19
	16	No-growth	27	15
	48	55	0.88	3.31	0.05
	17	No-growth	48	20
	19	No-growth	48	20
	Total		178	44
Colonised ACs	3	mixed coagulase-negative Staphylococci	30	19
	7	S. epidermidis >100 cfu	47	22
	12	mixed coagulase-negative Staphylococci	90	39	61	69	0.81	3.20	0.07
	13	S. epidermidis >100 cfu	24	16
	14	P. aeruginosa >100 cfu	48	19
	Total		239	51