A Single-nucleotide-polymorphism Real-time PCR Assay for Genotyping of Mycobacterium Tuberculosis Complex in Peri-urban Kampala

Overview

Journal BMC Infect Dis

Publisher Biomed Central

Specialty Infectious Diseases

Date 2015 Oct 2

PMID 26423522

Citations 4

Authors

Eddie M Wampande

Stavroula K Hatzios

Beatrice Achan

Ezekiel Mupere

Mary Nsereko

Harriet K Mayanja

Kathleen Eisenach

W Henry Boom

Sebastien Gagneux

Moses L Joloba

Affiliations

Soon will be listed here.

Abstract

Background: Accurate and high-throughput genotyping of Mycobacterium tuberculosis complex (MTBC) may be important for understanding the epidemiology and pathogenesis of tuberculosis (TB). In this study, we report the development of a LightCycler® real-time PCR single-nucleotide-polymorphism (LRPS) assay for the rapid determination of MTBC lineages/sublineages in minimally processed sputum samples from TB patients.

Method: Genotyping analysis of 70 MTBC strains was performed using the Long Sequence Polymorphism-PCR (LSP-PCR) technique and the LRPS assay in parallel. For targeted sequencing, 9 MTBC isolates (three isolates per MTBC lineage) were analyzed for lineage-specific single nucleotide polymorphisms (SNPs) in the following three genes to verify LRPS results: Rv004c for MTB Uganda family, Rv2962 for MTB lineage 4, and Rv0129c for MTB lineage 3. The MTBC lineages present in 300 smear-positive sputum samples were then determined by the validated LRPS method without prior culturing.

Results: The LSP-PCR and LRPS assays produced consistent genotyping data for all 70 MTBC strains; however, the LSP-PCR assay was 10-fold less sensitive than the LRPS method and required higher DNA concentrations to successfully characterize the MTBC lineage of certain samples. Targeted sequencing of genes containing lineage-specific SNPs was 100 % concordant with the genotyping results and provided further validation of the LRPS assay. Of the 300 sputum samples analyzed, 58 % contained MTBC from the MTBC-Uganda family, 27 % from the MTBC lineage 4 (excluding MTBC Uganda family), 13 % from the MTBC lineage 3, and the remaining 2 % were of indeterminate lineage.

Conclusion: The LRPS assay is a sensitive, high-throughput technique with potential application to routine genotyping of MTBC in sputum samples from TB patients.

Citing Articles

Interaction between Lineage and Human Genetic Variants Reveals Novel Pathway Associations with Severity of TB.

McHenry M, Wampande E, Joloba M, Malone L, Mayanja-Kizza H, Bush W Pathogens. 2021; 10(11).

PMID: 34832643 PMC: 8617877. DOI: 10.3390/pathogens10111487.

Diversity of Complex Lineages Associated with Pulmonary Tuberculosis in Southwestern, Uganda.

Micheni L, Kassaza K, Kinyi H, Ntulume I, Bazira J Tuberc Res Treat. 2021; 2021:5588339.

PMID: 34306752 PMC: 8264515. DOI: 10.1155/2021/5588339.

Development and application of affordable SNP typing approaches to genotype Mycobacterium tuberculosis complex strains in low and high burden countries.

Cancino-Munoz I, Gil-Brusola A, Torres-Puente M, Mariner-Llicer C, Dogba J, Akinseye V Sci Rep. 2019; 9(1):15343.

PMID: 31653874 PMC: 6814786. DOI: 10.1038/s41598-019-51326-2.

Genetic variability and consequence of Mycobacterium tuberculosis lineage 3 in Kampala-Uganda.

Wampande E, Naniima P, Mupere E, Kateete D, Malone L, Stein C PLoS One. 2019; 14(9):e0221644.

PMID: 31498808 PMC: 6733460. DOI: 10.1371/journal.pone.0221644.

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