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Archives of Clinical Infectious Diseases

Infectious Diseases and Tropical Medicine Research Center, SBUMS

e-ISSN 2345-2641
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Evaluating the Sensitivity of Three Primers Using PCR-Restriction Fragment Length Polymorphism Analysis for Rapid Identification of Mycobacterium Simiae Isolated from Pulmonary Tuberculosis Patients

Authors

Fezzeh Heidari1,*, Parissa Farnia2, Jamileh Nowroozi1, Ahmad Majd3, Mohammad Reza Masjedi2, Ali Akbar Velayati2
1Department of Microbiology, Islamic Azad University, Tehran North Branch, Tehran, IR Iran
2Mycobacteriology Research Center, National Research Institute of Tuberculosis and Lung Disease (NRITLD), Shahid Beheshti University of Medical Scieneces, Tehran, IR Iran
3Department of Biology, Islamic Azad University, Tehran North Branch, Tehran, IR Iran
*Corresponding Author: Department of Microbiology, Islamic Azad University ,Tehran North Branch), Tehran, IR Iran., [email protected]. Email: [email protected]
Archives of Clinical Infectious Diseases:Vol. 5, issue 1; 30-5
Published online:Jan 31, 2010
Article type:Research Article
How to Cite:Heidari F, Farnia P, Nowroozi J, Majd A, Masjedi MR, et al. Evaluating the Sensitivity of Three Primers Using PCR-Restriction Fragment Length Polymorphism Analysis for Rapid Identification of Mycobacterium Simiae Isolated from Pulmonary Tuberculosis Patients. Arch Clin Infect Dis. 2010;5(1):. doi:

Abstract

Background:

Nowadays the molecular methods widely use for rapid identification of Mycobacterium other than tuberculosis (MOTT). The Mycobacterium simiae isolates are cause of majority of human pulmonary diseases compared with other atypical mycobacteria. As sensitivity of primers and digestion patterns for diversified fragments is different, this survey evaluated the three various fragments using the PCR- restriction fragment length polymorphism analysis (PRA) for rapid diagnostic of M. simiae isolates.

Patients and Methods:

Strains that were identified as M. simiae (17 isolates) by phenotypic (photochromogen and positive niacin) methods were selected for this study. The fragments of the 16S-23S rRNA gene spacer and hsp65 gene were amplified by PCR. Subsequently the amplicons were digested with three restriction enzyme namely AvaII, HphI and HpaII for a 644bp region of hsp65 DNAs, BstEII and HaeIII endonucleases for 439bp region of hsp65 gene (TB11 and TB12 fragment) and HaeIII digestion for 225bp region of 16S-23S rRNA gene spacer.

Results:

Of 962 culture positive specimens, 17(1.7%) were identified as M. simiae species; majority of them were multidrug-resistance (12; 70.5%). The overall detection rate by Tb11, Tb12 and SP primers were 82.3% whereas hsp65 primer was 100% (p>0.005). We also found out that the HpaII and HphI enzymes were more specific to distinguish M. simiae species than other restriction enzyme used in this study.

Conclusion:

The high discriminative power of hsp65 pattern particularly HpaII digestion, provide an exact and costeffective method for rapid identification of M. simiae strains among registered pulmonary cases.

KeywordsMycobacterium simiaePRA methodRapid identification

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Copyright

© 2010, Author(s). This open-access article is available under the Creative Commons Attribution 4.0 (CC BY 4.0) International License (https://creativecommons.org/licenses/by/4.0/), which allows for unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.

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