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Extraction of microsporidial DNA from modified trichrome-stained clinical slides and subsequent species identification using PCR sequencing

Published online by Cambridge University Press:  28 April 2008

K. S. CHAN*
Affiliation:
Department of Pathology, Singapore General Hospital, Outram Road, Singapore169608
T. H. KOH
Affiliation:
Department of Pathology, Singapore General Hospital, Outram Road, Singapore169608
*
*Corresponding author. Tel: +65 91804878/+65 63214505. Fax: +65 6222 6826. E-mail address: [email protected]

Summary

Molecular techniques involving polymerase chain reaction (PCR) and sequencing provide a relatively simple and objective means of identifying microsporidia to species level. We modified previously described methods of DNA extraction and PCR conditions for identification of microsporidia from museum slides, clinical specimens and environmental samples and successfully identified Vittaforma corneae in 11 out of 13 cases of microsporidial infection from used trichrome-stained slides of corneal scrapings from HIV-negative patients with keratoconjunctivitis.

Type
Original Articles
Copyright
Copyright © 2008 Cambridge University Press

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References

REFERENCES

Dowd, S. E., Gerba, C. P. and Pepper, I. L. (1998). Confirmation of the human pathogenic microsporidia Enterocytozoon bieneusi, Encephalitozoon intestinalis and Vittaforma corneae in water. Applied and Environmental Microbiology 64, 33323335.CrossRefGoogle ScholarPubMed
Hyliš, M., Weiser, J., Obornik, M. and Vavra, J. (2005). DNA isolation from museum and type collection slides of microsporidia. Journal of Invertebrate Pathology 88, 257260.CrossRefGoogle ScholarPubMed
Joseph, J., Sharma, S., Murthy, S. I., Krishna, P. V., Garg, P., Nutheti, R., Kenneth, J. and Balasubramanian, D. (2006). Microsporidial keratitis in India: 16S rRNA gene-based PCR assay for diagnosis and species identification of microsporidia in clinical samples. Investigative Ophthalmology Visual Science 47, 44684473.CrossRefGoogle ScholarPubMed
Muller, A., Stellermann, K., Hartmann, P., Schrappe, M., Fätkenheuer, G., Salzberger, B., Diehl, K. and Franzen, C. (1999). A powerful DNA extraction method and PCR for detection of microsporidia in clinical stool specimens. Clinical and Diagnostic Laboratory Immunology 6, 243246.CrossRefGoogle ScholarPubMed
Weber, R., Schwartz, D. A. and Deplazes, P. (1999). Laboratory diagnosis of microsporidiosis. In The Microsporidia and Microsporidiosis (ed. Wittner, M. and Weiss, L. M.), pp. 315362. ASM Press, Washington, DC.Google Scholar
Weiss, L. M. (2005). Microsporidiosis. In Mandell, Douglas and Bennett's Principles and Practice of Infectious Diseases. 6th Edn. (ed. Mandell, G. L., Bennett, J. E. and Dolin, R.), pp. 32373254. Elsevier Churchill Livingstone, Philadelphia, USA.Google Scholar
Weiss, L. M. and Vossbrinck, C. R. (1999). Molecular biology, molecular phylogeny and molecular diagnostic approaches to the microsporidia. In The Microsporidia and Microsporidiosis (ed. Wittner, M. and Weiss, L. M.), pp. 129171. ASM Press, Washington, DC.Google Scholar