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Journal of Clinical Microbiology, June 1998, p. 1621-1624, Vol. 36, No. 6
Institute of Endemic Diseases, University of
Khartoum, Khartoum, Sudan,1 and
Department of Infectious Diseases,
Received 13 November 1997/Returned for modification 8 February
1998/Accepted 15 March 1998
Microscopy and PCR were compared for use in the diagnosis of
post-kala-azar dermal leishmaniasis (PKDL) in 63 patients.
Aspirates of lymph nodes (samples from 52 patients), skin (23 samples), and bone marrow (18 samples) were used. For 11 patients lymph node
aspiration could be repeated 6 months after they recovered from PKDL.
During active PKDL, PCR was positive for 42 of 52 (80.8%) lymph node
aspirates and 19 of 23 (82.7%) skin aspirates, whereas microscopy was
positive for only 9 of 52 (17.3%) lymph node aspirates and 7 of 23 (30.4%) skin aspirates. PCR was always positive when parasites were
seen by microscopy. When the results obtained with lymph node and skin
aspirates from the same patient (n = 16) were compared, there was complete agreement. Bone marrow samples were negative by microscopy and PCR for 16 patients and positive by both
methods for 1 patient; for one sample only the PCR was positive. PCR
confirmed the co-occurrence of visceral leishmaniasis and PKDL in one
patient and confirmed the suspicion of this co-occurrence in the other
patient. After recovery, no parasites were found by microscopy, but 2 of 11 (18.2%) samples were still positive by PCR. Thirty negative
controls were all found to be PCR negative, and 15 positive controls
were all PCR positive. Cross-reactions with Mycobacterium
leprae could be ruled out. In conclusion, PCR with inguinal lymph
node or skin aspirates is suitable for confirming the clinical
diagnosis of PKDL. In some patients, lymph node aspirates are probably
preferred because aspiration of material from the skin may leave scars.
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Use of PCR for Diagnosis of Post-Kala-Azar
Dermal Leishmaniasis
*
Corresponding author. Mailing address: Royal Tropical
Institute (KIT), Department of Biomedical Research, Meibergdreef 39, 1105 AZ Amsterdam, The Netherlands. Phone: (31)-20-5665441. Fax: (31)-20-6971841. E-mail: bo{at}mail.support.nl.
Journal of Clinical Microbiology, June 1998, p. 1621-1624, Vol. 36, No. 6
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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