Comparison of Traditional Methods and PCR for Diagnosis of Cutaneous Leishmaniasis in South-West of Iran

AUTHORS

Shahram Khademvatan 1 , Jasem Saki 2 , * , Sharif Maraghi 2

AUTHORS INFORMATION

1 Department of Medical Parasitology, Cellular and Molecular Research Center , Ahwaz Jundishapur University of Medical Sciences, Ahwaz, Iran

2 Department of Medical Parasitology, Infectious and Tropical Diseases Research Center, Ahwaz Jundishapur University of Medical Sciences, Ahwaz, Iran

ARTICLE INFORMATION

Zahedan Journal of Research in Medical Sciences: 14 (8); e93257
Published Online: December 07, 2011
Article Type: Research Article
Received: August 27, 2011
Accepted: October 05, 2011

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Abstract

Background: The usual method for laboratory diagnosis of cutaneous leishmaniasis was the direct observation of parasites under a light microscope. Although this method has high specificity, it has low sensitivity. The purpose of this study is to compare three methods of direct observation, culture and Mini-exon-PCR to diagnose cutaneous leishmaniasis in Khuzestan province. This study intends to compare sensitivity of PCR approach with sensitivity of the existing traditional methods to diagnose cutaneous leishmaniasis using Mini-exon gene.
Materials and Methods:
A total 216 skin biopsies prepared from patients with cutaneous leishmaniasis were studied though direct method, culture in NNN, culture in RPMI 1640 and Mini-exon-PCR and the sensitivity of these methods were compared with each other. In this study Mini-exon-PCR was considered as the gold standard method.
Results: Results showed that 46.7% with direct method, 35.1% with culture method in RPMI 1640, 57.8% with culture method in NNN and 70.3% with PCR were positive. Sensitivity was obtained 66.4% for microscopic observation, 50% for culture in RPMI1640, and 82.2% for culture in NNN and 100% for PCR.
Conclusion: This study showed that PCR on samples stored in normal saline has higher sensitivity and specificity than other traditional methods (p>0.05). Thus, Mini-exon-PCR on samples in normal saline is a reliable method to diagnose cutaneous leishmaniasis, especially in cases where the diagnosis is negative with the other methods.

Keywords

Traditional method PCR Cutaneous leishmaniasis south-West of Iran

© 2012, Zahedan Journal of Research in Medical Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
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