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Antimicrobial Agents and Chemotherapy, October 1999, p. 2550-2554, Vol. 43, No. 10
0066-4804/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Detection of Rifampin Resistance in Mycobacterium tuberculosis by Double Gradient-Denaturing Gradient Gel Electrophoresis

Paolo Scarpellini,1,* Sergio Braglia,1 Paola Carrera,2 Maura Cedri,1 Paola Cichero,3 Alessia Colombo,1 Rosella Crucianelli,2 Andrea Gori,4 Maurizio Ferrari,2 and Adriano Lazzarin1

Infectious Diseases Division,1 Clinical Molecular Biology Laboratory,2 and Microbiology Laboratory,3 San Raffaele Scientific Institute, and Clinic of Infectious Diseases, University of Milan,4 Milan, Italy

Received 26 October 1998/Returned for modification 14 December 1998/Accepted 13 August 1999

We applied double gradient-denaturing gradient gel electrophoresis (DG-DGGE) for the rapid detection of rifampin (RMP) resistance from rpoB PCR products of Mycobacterium tuberculosis isolates and clinical samples. The results of this method were fully concordant with those of DNA sequencing and susceptibility testing analyses. DG-DGGE is a valid alternative to the other methods of detecting mutations for predicting RMP resistance.


* Corresponding author. Mailing address: Infectious Diseases Division, San Raffaele Scientific Institute, Via Stamira D'Ancona 20, 20127 Milan, Italy. Phone: 39-02-2643-7985. Fax: 39-02-2643-7989. E-mail: scarpellini.paolo{at}hsr.it.


Antimicrobial Agents and Chemotherapy, October 1999, p. 2550-2554, Vol. 43, No. 10
0066-4804/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.



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