UK NEQAS for Antibiotic Assays

Distribution 2607 Closing Date 24-May-2010

Weighed-in concentrations and All-laboratory Trimmed Means (ALTM)

Analyte

Weighed-in

(mg/L)

Target*

ALTM

(mg/L)

Returns

CV%

Amikacin	22.5	ALTM	23.1	91	1.4	5.9
Flucytosine	0.0	NS	N/A	All returns ‘<’	N/A	N/A
Gentamicin	7.9	ALTM	7.1	230	0.6	7.9
Teicoplanin	5.4	ALTM	5.9	21	0.9	15.1
Tobramycin	6.9	ALTM	6.2	114	0.7	10.5
Vancomycin	64.3	ALTM	62.2	226	7.2	11.6

*NS means the analyte was not scored

Weighed-in concentration

The weighed-in concentration (mg/L) is given for information only. It is published three days after the distribution closes and can be used to give a guide to individual laboratory performance. ALTM values (mg/L) and statistics are published as soon as they are available.

Target

The ALTM is used as the target concentration by the Scheme for determination of laboratory performance for all analytes

The weighed-in values are also available by telephone (recorded message) on INT+UK+117 9505050 Extension 2269