Spoligotyping followed by double-repetitive-element PCR as rapid alternative to IS6110 fingerprinting for epidemiological studies of tuberculosis.
A total of 129 clinical isolates of Mycobacterium tuberculosis representing 91 patients were typed by a combination of direct-repeat (DR)-based spoligotyping and an inter-IS6110-PGRS (polymorphic GC-rich region)-PCR, also designated double-repetitive-element PCR (DRE-PCR). During the first phase of this investigation, 72 clinical strains representing 52 patients were initially typed by IS6110-restriction fragment length polymorphism (RFLP) and DR-RFLP, followed by spoligotyping and DRE-PCR. In the second phase of this investigation, the discriminating ability of spoligotyping plus DRE-PCR was studied for 57 isolates from 39 patients who were suspected to be epidemiologically linked, and the typing results were later confirmed by IS6110-RFLP and DR-RFLP analyses. The molecular clustering of the isolates remained identical irrespective of the methods used. These results show that the association of two PCR-based fingerprinting techniques for molecular epidemiology of tuberculosis has a discriminating ability similar to the IS6110-RFLP reference method.
Sola
C
C
Unité de la Tuberculose et des Mycobactéries, Institut Pasteur, Morne Jolivière, Pointe-à-Pitre, Guadeloupe, French West Indies.
Horgen
L
L
Maïsetti
J
J
Devallois
A
A
Goh
K S
KS
Rastogi
N
N
D015373:Bacterial Typing Techniques; D016172:DNA Fingerprinting; D004251:DNA Transposable Elements; D006801:Humans; D009169:Mycobacterium tuberculosis / Q000145:classification*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length
D004251:DNA Transposable Elements