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MIRU-VNTR Genotyping of Mycobacterium tuberculosis isolates obtained
from Uganda
Authors: Mr. Biryabarema Emmanuel1 , Mr. Kaddu Arafat1 , Miss Asio Gloria Joy1 and Miss.
Namagembe Hamidah1
Supervisor: Mr Kigozi Edgar 1
1 Department of Immunology and Molecular Biology, Makerere University College of Health Sciences
Corresponding Author: emmanuelb060@gmail.com, +256704260973
Introduction
Tuberculosis (TB) is one of the most common global health problems and also one of the
world’s deadliest communicable diseases. For example, in 2014, an estimated 9.6 million
persons developed tuberculosis, and 1.5 million died.
Uganda, like other Sub-Saharan countries, continues to identify thousands of tuberculosis
(TB) cases (43,858 TB patients of all types were notified in 2015/16), yet these are only half
of the estimated TB cases. The WHO has classified Uganda as a country with a high burden
of TB. However, there currently is little information available regarding prevalent genotypes
circulating in Uganda.
This study aimed at identification of Mycobacterium tuberculosis strains present in the 17
isolates obtained from Uganda and to determine the most predominant strain of the different
M. tuberculosis strains in Uganda.
Methods
MIRU-VNTR genotyping was carried using 15 different loci with dissimilar Variable Number
of Tandem Repeats (VNTRs) which were then PCR-amplified, and analyzed to obtain
fingerprints of unrelated Mycobacterium tuberculosis species.
Results
This study proved presence of selected representative isolates that included Beijing, EAI,
Delhi/CAS, Ghana, Uganda I and Uganda II in Uganda.
Furthermore, this study deduced, Uganda II was the most predominant genotype (with a
percentage of 46.15%), followed by Delhi/CAS and Ghana each with a prevalence of 15.38%.
Conclusion
MIRU-VNTR genotyping confirmed earlier reports that MTB strain “Uganda genotype” is the
predominant lineage in Kampala, Uganda.
Recommendations
Adherence to treatment regimen should be strengthened by the National tuberculosis
control program to stop on-going transmission of tuberculosis.
Data on sub-lineages need be analysed by age and sex, inorder to draw firm conclusions from
such a study.
A similar study should be carried out country wide(on a large number of isolates or rather
on a large scale) in order to come up with conclusive analysis which would be largely
important in policy making and implementation of TB control program.

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  • 1. MIRU-VNTR Genotyping of Mycobacterium tuberculosis isolates obtained from Uganda Authors: Mr. Biryabarema Emmanuel1 , Mr. Kaddu Arafat1 , Miss Asio Gloria Joy1 and Miss. Namagembe Hamidah1 Supervisor: Mr Kigozi Edgar 1 1 Department of Immunology and Molecular Biology, Makerere University College of Health Sciences Corresponding Author: emmanuelb060@gmail.com, +256704260973 Introduction Tuberculosis (TB) is one of the most common global health problems and also one of the world’s deadliest communicable diseases. For example, in 2014, an estimated 9.6 million persons developed tuberculosis, and 1.5 million died. Uganda, like other Sub-Saharan countries, continues to identify thousands of tuberculosis (TB) cases (43,858 TB patients of all types were notified in 2015/16), yet these are only half of the estimated TB cases. The WHO has classified Uganda as a country with a high burden of TB. However, there currently is little information available regarding prevalent genotypes circulating in Uganda. This study aimed at identification of Mycobacterium tuberculosis strains present in the 17 isolates obtained from Uganda and to determine the most predominant strain of the different M. tuberculosis strains in Uganda. Methods MIRU-VNTR genotyping was carried using 15 different loci with dissimilar Variable Number of Tandem Repeats (VNTRs) which were then PCR-amplified, and analyzed to obtain fingerprints of unrelated Mycobacterium tuberculosis species. Results This study proved presence of selected representative isolates that included Beijing, EAI, Delhi/CAS, Ghana, Uganda I and Uganda II in Uganda. Furthermore, this study deduced, Uganda II was the most predominant genotype (with a percentage of 46.15%), followed by Delhi/CAS and Ghana each with a prevalence of 15.38%. Conclusion MIRU-VNTR genotyping confirmed earlier reports that MTB strain “Uganda genotype” is the predominant lineage in Kampala, Uganda. Recommendations Adherence to treatment regimen should be strengthened by the National tuberculosis control program to stop on-going transmission of tuberculosis. Data on sub-lineages need be analysed by age and sex, inorder to draw firm conclusions from such a study. A similar study should be carried out country wide(on a large number of isolates or rather on a large scale) in order to come up with conclusive analysis which would be largely important in policy making and implementation of TB control program.