| dc.description.abstract | Background: Tinea corporis is a dermatophytosis on non-hair bearing skin (glabrous
kin) except the palms and soles. Direct microscopic examination to identify fungal
structures is a rapid, simple, affordable technic and have been widely used as an early
screening test. Nevertheless, it can yield false negative results in up to l5% of the
cases. The introduction of centrifugation measure will yield more homogenous
specimens and concentrates in order to increase the accuracy and reduce the false
negative results,
Objective: To compare the accuracy of microscopic direct preparation examination
of l0% KOH with centrifugation and without centrifugation in patients with tinea
corporis.
Method: This study was a diagnostic test of tinea corporis using direct examination
with 10% KOH with centrifugation and without centrifugation by using fungal
culture as the gold standard.
Subjects: Thirty patients suspected of tinea corporis based on history taking and
dermatologic examination.
Results: The values of the diagnostic test of this study for the direct examination
using 10% KOH without centrifugation were: the sensitivity was 42,31o/o, specificity
was 75%, positive predictive value was 91,67%, negative predictive value was
16,67%, positive likelihood ratio was 1,69, negative likelihood ratio was 0,76, the
accuracy value was 46,67%, and on the examination of 10% KOH with
centrifugation, the sensitivity was 88,46%, specificity was 75Yo, positive predictive
value was 95,83Vo, negative predictive value was 50%, positive likelihood ratio was
3,53, negative likelihood ratio was 0,15, the accuracy was 86,66%.
Conclusion: The results of the diagnostic test using l0% KOH examination method
with centrifugation was better than the method without centrifugation. The 10% KOH
examination with centrifugation would be a very good method in the diagnosis of
tinea corporis accompanied by fungal culture. | en_US |
