O Zewdie1, A Mihret2, G Ameni3, A Worku3, T Gemechu4, T Abebe4. 1. Department of Medical Laboratory Sciences, College of Medical and Health Sciences, Wollega University, Nekemte, Addis Ababa; Department of Microbiology, Immunology and Parasitology, College of Health Sciences, Addis Ababa University, Addis Ababa, Addis Ababa. 2. Department of Microbiology, Immunology and Parasitology, College of Health Sciences, Addis Ababa University, Addis Ababa, Addis Ababa; Armauer Hansen Research Institute, Addis Ababa, Addis Ababa. 3. Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia. 4. Department of Microbiology, Immunology and Parasitology, College of Health Sciences, Addis Ababa University, Addis Ababa, Addis Ababa.
Abstract
BACKGROUND: In Ethiopia, one of the world's 22 high tuberculosis (TB) burden countries, one third of the tuberculosis (TB) cases are attributed to tuberculosis lymphadenitis (TBLN). However, information on the molecular type of the mycobacterial species and strains that cause TBLN in the country is scarce. OBJECTIVE: To identify the species and strains of mycobacteria that cause TBLN in Ethiopia. METHODS AND RESULTS: A cross-sectional study was conducted among 206 presumed TBLN cases to characterise positive culture isolates. Mycobacterium tuberculosis complex species and strains were identified using region of difference 9 deletion and SITVIT WEB, respectively. Of the 206 fine-needle aspirate samples collected, 74 (36%) were culture-positive: 73 (98.6%) of the isolates were M. tuberculosis, and the remaining 1.4% were M. bovis. Further characterisation of the 73 M. tuberculosis isolates led to 26 distinct spoligotype international types (SITs) and 13 newly identified patterns. The most prevalent strains were SIT149, SIT53, SIT26 and SIT37 of sublineages T3-ETH, T1, CASI-DELHI and T3, respectively; these accounted for 52.6% of the total number of strains. CONCLUSION: TBLN was mainly caused by M. tuberculosis and highly clustered strains SIT149, SIT53, SIT26 and SIT37 of sublineages T3-ETH, T1, CASI-DELHI and T3, respectively.
BACKGROUND: In Ethiopia, one of the world's 22 high tuberculosis (TB) burden countries, one third of the tuberculosis (TB) cases are attributed to tuberculosis lymphadenitis (TBLN). However, information on the molecular type of the mycobacterial species and strains that cause TBLN in the country is scarce. OBJECTIVE: To identify the species and strains of mycobacteria that cause TBLN in Ethiopia. METHODS AND RESULTS: A cross-sectional study was conducted among 206 presumed TBLN cases to characterise positive culture isolates. Mycobacterium tuberculosis complex species and strains were identified using region of difference 9 deletion and SITVIT WEB, respectively. Of the 206 fine-needle aspirate samples collected, 74 (36%) were culture-positive: 73 (98.6%) of the isolates were M. tuberculosis, and the remaining 1.4% were M. bovis. Further characterisation of the 73 M. tuberculosis isolates led to 26 distinct spoligotype international types (SITs) and 13 newly identified patterns. The most prevalent strains were SIT149, SIT53, SIT26 and SIT37 of sublineages T3-ETH, T1, CASI-DELHI and T3, respectively; these accounted for 52.6% of the total number of strains. CONCLUSION: TBLN was mainly caused by M. tuberculosis and highly clustered strains SIT149, SIT53, SIT26 and SIT37 of sublineages T3-ETH, T1, CASI-DELHI and T3, respectively.
Authors: A van Rie; R Warren; M Richardson; T C Victor; R P Gie; D A Enarson; N Beyers; P D van Helden Journal: N Engl J Med Date: 1999-10-14 Impact factor: 91.245
Authors: Karine Brudey; Jeffrey R Driscoll; Leen Rigouts; Wolfgang M Prodinger; Andrea Gori; Sahal A Al-Hajoj; Caroline Allix; Liselotte Aristimuño; Jyoti Arora; Viesturs Baumanis; Lothar Binder; Patricia Cafrune; Angel Cataldi; Soonfatt Cheong; Roland Diel; Christopher Ellermeier; Jason T Evans; Maryse Fauville-Dufaux; Séverine Ferdinand; Dario Garcia de Viedma; Carlo Garzelli; Lidia Gazzola; Harrison M Gomes; M Cristina Guttierez; Peter M Hawkey; Paul D van Helden; Gurujaj V Kadival; Barry N Kreiswirth; Kristin Kremer; Milan Kubin; Savita P Kulkarni; Benjamin Liens; Troels Lillebaek; Minh Ly Ho; Carlos Martin; Christian Martin; Igor Mokrousov; Olga Narvskaïa; Yun Fong Ngeow; Ludmilla Naumann; Stefan Niemann; Ida Parwati; Zeaur Rahim; Voahangy Rasolofo-Razanamparany; Tiana Rasolonavalona; M Lucia Rossetti; Sabine Rüsch-Gerdes; Anna Sajduda; Sofia Samper; Igor G Shemyakin; Urvashi B Singh; Akos Somoskovi; Robin A Skuce; Dick van Soolingen; Elisabeth M Streicher; Philip N Suffys; Enrico Tortoli; Tatjana Tracevska; Véronique Vincent; Tommie C Victor; Robin M Warren; Sook Fan Yap; Khadiza Zaman; Françoise Portaels; Nalin Rastogi; Christophe Sola Journal: BMC Microbiol Date: 2006-03-06 Impact factor: 3.605