Table 1.

Limit of detection and reproducibility of MALDI Biotyper system for yeast identification directly from a positive blood culture specimen

Sample 2-4 dilution	No. of CFU/ml	Identification	Score				% CV
			Specimen 1	Specimen 2	Specimen 3	Mean ± SD
Undiluted	5.9 × 106	Reliable identification	2.230	2.112	2.211	2.184 ± 0.063	2.90
			2.234	2.245	2.170	2.216 ± 0.041	1.83
			2.204	2.354	2.229	2.262 ± 0.080	3.55
1:10	5.9 × 105	Reliable identification	1.985	2.087	2.013	2.028 ± 0.053	2.60
			2.160	2.057	2.079	2.099 ± 0.054	2.58
			1.942	1.984	2.006	1.977 ± 0.033	1.64
1:100	5.9 × 104	Not reliable identification	1.328	1.230	1.276	1.278 ± 0.049	3.84
			1.174	1.381	1.273	1.276 ± 0.104	8.11
			1.382	1.361	1.370	1.371 ± 0.011	0.77
1:1,000	5.9 × 103	Not reliable identification	1.446	1.540	1.483	1.489 ± 0.047	3.18
			1.231	1.264	1.245	1.246 ± 0.017	1.33
			1.212	1.363	1.288	1.288 ± 0.076	5.86