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J Clin Microbiol. 1975 January; 1(1): 9-10

Comparison of four methods for determining nitrate utilization by cryptococci.

J C Rhodes and G D Roberts

ABSTRACT

This study evaluated the following methods for determining nitrate utilization: Wickerham broth, a special nitrate broth, Delft plate, and nitrate strip. With 236 isolates of cryptococci as test organisms, the special nitrate broth method gave 99% correct results and the Wickerham broth method gave 98%. The nitrate strip and Delft plate methods gave correct results in 94 and 86% of tests, respectively. The special nitrate broth method is judged superior because it provides accurate results within 48 h, compared to 14 days with the Wickerham broth method.

J Clin Microbiol. 1975 January; 1(1): 9-10






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