Evaluation of the Kudoh method for mycobacterial culture: Gambia experience
Objective/background: To evaluate the Kudoh swab method for improving laboratory diagnosis of tuberculosis (TB) in Gambia. Methods: A total of 75 sputa (50 smear positive and 25 smear negative) were examined. Sputum samples were collected from leftover routine samples from the Medical Research Counc...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2016-01-01
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| Series: | International Journal of Mycobacteriology |
| Subjects: | |
| Online Access: | http://www.ijmyco.org/article.asp?issn=2212-5531;year=2016;volume=5;issue=5;spage=166;epage=166;aulast=Jobarteh |
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| author | Tijan Jobarteh Jacob Otu Ensa Gitteh Francis Mendy Tutty I Faal-Jawara Boatema Ofori-Anyinam Abigail Ayorinde Ousman Secka Martin Antonio Florian Gehre |
| author_facet | Tijan Jobarteh Jacob Otu Ensa Gitteh Francis Mendy Tutty I Faal-Jawara Boatema Ofori-Anyinam Abigail Ayorinde Ousman Secka Martin Antonio Florian Gehre |
| author_sort | Tijan Jobarteh |
| collection | DOAJ |
| description | Objective/background: To evaluate the Kudoh swab method for improving laboratory diagnosis of tuberculosis (TB) in Gambia.
Methods: A total of 75 sputa (50 smear positive and 25 smear negative) were examined. Sputum samples were collected from leftover routine samples from the Medical Research Council Unit, Gambia TB Diagnostic Laboratory. The samples were processed using the standard N-acetyl-l-cysteine-NaOH (NALC-NaOH) methods currently used and Kudoh swab method. These were cultured on standard Lowenstein Jensen (LJ) and Modified Ogawa media, respectively, and incubated aerobically at 36 ± 1°C for mycobacterial growth. To determine if the decontamination and culture methods compared could equally detect the Mycobacterium tuberculosis complex (MTBC) highly commonly isolated in Gambia, spoligotyping was done.
Results: In total, 72% (54/75) of MTBC were recovered by both LJ and Modified Ogawa methods. The LJ method recovered 52% (39/75) and Modified Ogawa recovered 56% (42/75) of the MTBC, respectively. Spoligotyping showed Euro-American 35% (19/54), Indo-Oceanic 35% (19/54), Mycobacterium africanum (West African type 2) 26% (14/54), Beijing 2% (1/54), and M. africanum (West African type 1) 2% (1/54).
Conclusion: The Kudoh method is simpler and cheaper than the NALC-NaOH method. There was no significant difference in recovery between the methods. The Kudoh method is ideal in overburdened TB laboratories with poor resources in developing countries. The predominant lineages were Euro-American and Indo-Oceanic, followed by M. africanum (West African type 2). |
| first_indexed | 2024-12-13T21:20:46Z |
| format | Article |
| id | doaj.art-5196e4ff3e8643a6ae85ad12ad42f25d |
| institution | Directory Open Access Journal |
| issn | 2212-5531 2212-554X |
| language | English |
| last_indexed | 2024-12-13T21:20:46Z |
| publishDate | 2016-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | International Journal of Mycobacteriology |
| spelling | doaj.art-5196e4ff3e8643a6ae85ad12ad42f25d2022-12-21T23:31:06ZengWolters Kluwer Medknow PublicationsInternational Journal of Mycobacteriology2212-55312212-554X2016-01-015516616610.1016/j.ijmyco.2016.09.049Evaluation of the Kudoh method for mycobacterial culture: Gambia experienceTijan JobartehJacob OtuEnsa GittehFrancis MendyTutty I Faal-JawaraBoatema Ofori-AnyinamAbigail AyorindeOusman SeckaMartin AntonioFlorian GehreObjective/background: To evaluate the Kudoh swab method for improving laboratory diagnosis of tuberculosis (TB) in Gambia. Methods: A total of 75 sputa (50 smear positive and 25 smear negative) were examined. Sputum samples were collected from leftover routine samples from the Medical Research Council Unit, Gambia TB Diagnostic Laboratory. The samples were processed using the standard N-acetyl-l-cysteine-NaOH (NALC-NaOH) methods currently used and Kudoh swab method. These were cultured on standard Lowenstein Jensen (LJ) and Modified Ogawa media, respectively, and incubated aerobically at 36 ± 1°C for mycobacterial growth. To determine if the decontamination and culture methods compared could equally detect the Mycobacterium tuberculosis complex (MTBC) highly commonly isolated in Gambia, spoligotyping was done. Results: In total, 72% (54/75) of MTBC were recovered by both LJ and Modified Ogawa methods. The LJ method recovered 52% (39/75) and Modified Ogawa recovered 56% (42/75) of the MTBC, respectively. Spoligotyping showed Euro-American 35% (19/54), Indo-Oceanic 35% (19/54), Mycobacterium africanum (West African type 2) 26% (14/54), Beijing 2% (1/54), and M. africanum (West African type 1) 2% (1/54). Conclusion: The Kudoh method is simpler and cheaper than the NALC-NaOH method. There was no significant difference in recovery between the methods. The Kudoh method is ideal in overburdened TB laboratories with poor resources in developing countries. The predominant lineages were Euro-American and Indo-Oceanic, followed by M. africanum (West African type 2).http://www.ijmyco.org/article.asp?issn=2212-5531;year=2016;volume=5;issue=5;spage=166;epage=166;aulast=JobartehKudoh methodLowenstein Jensen mediumModified Ogawa mediumMycobacteriaN-Acetyl-l-cysteine-NaOH methodTuberculosis |
| spellingShingle | Tijan Jobarteh Jacob Otu Ensa Gitteh Francis Mendy Tutty I Faal-Jawara Boatema Ofori-Anyinam Abigail Ayorinde Ousman Secka Martin Antonio Florian Gehre Evaluation of the Kudoh method for mycobacterial culture: Gambia experience International Journal of Mycobacteriology Kudoh method Lowenstein Jensen medium Modified Ogawa medium Mycobacteria N-Acetyl-l-cysteine-NaOH method Tuberculosis |
| title | Evaluation of the Kudoh method for mycobacterial culture: Gambia experience |
| title_full | Evaluation of the Kudoh method for mycobacterial culture: Gambia experience |
| title_fullStr | Evaluation of the Kudoh method for mycobacterial culture: Gambia experience |
| title_full_unstemmed | Evaluation of the Kudoh method for mycobacterial culture: Gambia experience |
| title_short | Evaluation of the Kudoh method for mycobacterial culture: Gambia experience |
| title_sort | evaluation of the kudoh method for mycobacterial culture gambia experience |
| topic | Kudoh method Lowenstein Jensen medium Modified Ogawa medium Mycobacteria N-Acetyl-l-cysteine-NaOH method Tuberculosis |
| url | http://www.ijmyco.org/article.asp?issn=2212-5531;year=2016;volume=5;issue=5;spage=166;epage=166;aulast=Jobarteh |
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