Abstract
To the Editor: In a letter published in the Journal De La Vega et al.1 mention the possible presence of inhibitors of the nitroblue-tetrazolium reducing capacity in the plasma of a patient with infections and diabetes. In our laboratory we have studied this activity of nitroblue tetrazolium in 82 diabetic patients with or without infections. These included asymptomatic diabetes (all confirmed by glucose tolerance test) as well as frank diabetes, both ketosis-prone and ketosis-resistant. Only those showing infections by mycobacteria were excluded from this study, because they are known to give abnormal results on the nitroblue tetrazolium test.2 3 4 The activity . . .

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