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We had reported that the rate of non-specific reaction in measurement of (1--&gt;3)-beta-D-glucan was decreased by improvement of the alkaline pretreatment reagent of Fungitec G-test MK (MK assay). To compare the clinical usefulness between conventional MK assay and new MK assay using improved alkaline pretreatment reagent, 121 plasma samples were tested. The sensitivity, specificity, positive predictive value (PPV), negative predictive values (NPV) in conventional MK assay were 91.7%, 85.3%, 44.0% and 98.8%, respectively. Those in new MK assay were 75.0%, 91.6%, 52.9% and 96.7%, respectively. On the other hand, area under the curve (AUC) of receiver operating characteristic (ROC) analysis in conventional and new MK assay was 0.9175 and 0.9123 without a significant difference. It has been recognized that the sensitivity in conventional MK assay is higher than those in other beta-glucan assays. Then, the specificity of new MK assay was improved by using improved alkaline pretreatment reagent, without decreasing the sensitivity. Thus, the present findings indicate that the new MK assay is clinically quite useful.

Clinical Usefulness of the (1^|^rarr;3)-^|^beta;-D-glucan Measurement Kit Using the Improved Alkaline Pretreatment Method