Spoligotyping-Based Genetic Diversity of Mycobacterium tuberculosis in Ethiopia: A Systematic Review
Year: 2018
Type: conference-abstract
Abstract: To review and compile the results of studies conducted on strains and lineages of M tuberculosis in Ethiopia. A systematic search and review of articles published on M tuberculosis strains and lineages in Ethiopia were made. PubMed and Google Scholar databases were considered for the search while the keywords used were M tuberculosis, molecular epidemiology, molecular typing spoligotyping, and Ethiopia. Twenty-one studies were considered in this review, and a total of 3,071 M tuberculosis isolates and 3,067 strains were included. These studies used spoligotyping and identified five lineages, including Indo-Ocean, East Asian/Beijing, East African-Indian, Euro-American, and Ethiopian, in a proportion of 7.1%, 0.2%, 23.0%, 64.8%, and 4.1%, respectively. Thus, Euro-American was the most frequently (64.8%) occurring lineage while East Asian was the least (0.2%) frequently occurring lineage in the country. Surprisingly, the Ethiopian lineage seemed to be localized to northeastern Ethiopia. In addition, the top five clades identified by this review were T, CAS, H, Manu, and Ethiopian, comprising 48.0%, 23.0%, 11.0%, 6.0%, and 4.1% of the strains, respectively. Furthermore, predominant shared types (spoligotype patterns) identified were SIT149, SIT53, SIT25, SIT37, and SIT21, each consisting of 420, 343, 266, 162, and 102 isolates, respectively, while on the other hand, 15% of the strains were orphan. According to the summary of the results of this review, diversified strains and lineages of M tuberculosis were found in Ethiopia, and the frequencies of occurrence of these strains and lineages were variable in different regions of the country. This systematic review is registered in the PRISMA with the registration number of 42017059263.
Authors: Begna Eticha, Gobena Ameni
Institution: Addis Ababa University
Language: English
Subfield: Infectious Diseases
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W2891835946