Studying Transmission of Tuberculosis with Use of DNA Fingerprinting

Doveren, R. F. C.; Keizer, Sytze

doi:10.1086/517711

CLIN INFECT DIS

1998

DOI: 10.1086/517711

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Studying Transmission of Tuberculosis with Use of DNA Fingerprinting

R. F. C. Doveren¹,

Sytze Keizer²

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1999

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“…Strains isolated from native Danes almost exclusively exhibit high-copy-number patterns (4). A number of additional typing methods for IS6110 low-copy-number strains have been used (10,15,21,25,29). One of those methods is the PCR-based spoligotyping based on DNA polymorphism of the direct repeat (DR) region (15).…”

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Usefulness of Spoligotyping To Discriminate IS 6110 Low-Copy-Number Mycobacterium tuberculosis Complex Strains Cultured in Denmark

et al. 1999

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Mycobacterium tuberculosis complex strains cultured in Denmark have been analyzed by IS6110 restriction fragment length polymorphism (RFLP) on a routine basis from 1992 and onwards. Due to the influx of immigrants with tuberculosis, the number of strains harboring only one to five copies of IS6110 has increased steadily. Since the discriminatory power of IS6110 fingerprinting for such strains is poor, we have performed additional genotyping of all low-copy-number strains by the recently described PCR-based method known as spoligotyping. A total of 311 clinical strains were typed: 14 Mycobacterium bovisBCG, 48 M. bovis, and 249 M. tuberculosisstrains. Spoligotyping correctly differentiated M. bovisand M. bovis BCG from M. tuberculosis strains, but it did not differentiate M. bovis from M. bovis BCG. All M. bovis BCG strains exhibited identical spoligotype patterns. The discriminatory power of spoligotyping of low-copy-number M. tuberculosis strains was higher than that of IS6110 fingerprinting. Based on RFLP typing solely, 83% of the low-copy-number M. tuberculosis strains were found to form part of a cluster, and 75% were found to form a cluster on the basis of spoligotyping. When the two techniques were combined, the amount of clustering decreased to 55%. The combination of these two techniques might be valuable in studying the epidemiology of M. tuberculosis strains harboring few copies of the IS6110 element.

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Usefulness of Spoligotyping To Discriminate IS 6110 Low-Copy-Number Mycobacterium tuberculosis Complex Strains Cultured in Denmark

et al. 1999

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Studying Transmission of Tuberculosis with Use of DNA Fingerprinting

Cited by 1 publication

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Usefulness of Spoligotyping To Discriminate IS 6110 Low-Copy-Number Mycobacterium tuberculosis Complex Strains Cultured in Denmark

Usefulness of Spoligotyping To Discriminate IS 6110 Low-Copy-Number Mycobacterium tuberculosis Complex Strains Cultured in Denmark

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