The clinical presentation of tinea capitis may be varied and confusing
. This results in delays in diagnosis, loss to follow-up, and spread o
f the infection. This article describes the use of calcofluor white (C
FW) as a method for rapid diagnosis of tinea capitis. One hundred chil
dren with scaling scalps were evaluated. Specimens were obtained for f
ungal culture from each patient. Scales and hair were tested using the
CFW test. The CFW test was positive in 58 (76%) of those with positiv
e fungal cultures and 10 (42%) with negative fungal cultures. The sens
itivity and specificity of the test were 76 and 58%, respectively. The
relative ease and rapidity of the CFW test allows for rapid diagnosis
of tinea capitis, immediate treatment of patients, and decreased loss
to follow-up.