scholarly journals Laboratory Diagnosis of Mycobacterium tuberculosis in Resource Constraint Setting: Direct Sputum Smear Microscopy is Comparable with Automated Mycobacterium Growth Indicator Tube (BACTEC MGIT 960)

Author(s):  
Ochei, Kingsley Chinedum ◽  
Obeagu, Emmanuel Ifeanyi ◽  
Odo Michael ◽  
Ugobo Emmanuel Eteng
2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Rama L. Sumual ◽  
Greta J.P. Wahongan ◽  
Josef S.B. Tuda

Abstract: Pulmonary TB is still a threat included in top 10 causes of death in the world. Limitation in diagnostic methods is one of the obstacles in improving the detection of pulmonary TB cases. WHO recommend Loop-Mediated Isothermal Amplification (TB-LAMP) with sensitivity, specificity, high efficiency, fast, and simple in terms of molecular method to identify Mycobacterium tuberculosis. This study was aimed to find out whether LAMP-TB could detect M. tuberculosis in the sputum samples. This was a descriptive observational/survey study using a diagnostic test with a cross-sectional design. Samples were patients suspected as pulmonary TB with negative result in sputum smear microscopy at Prof. Dr. R. D. Kandou Hospital Manado during September until October 2017. The results obtained 25 samples of patients suspected pulmonary TB with negative result in sputum smear microscopy. Most of them were at the age of 52-64 years, male (18 people; 72%), and had purulent sputum (14 samples; 56%). Examination by using LAMP-TB obtained 4 samples (16%) stated as positive M. tuberculosis and 21 samples (84%) stated as negative M. tuberculosis. Conclusion: TB-LAMP could detect Mycobacterium tuberculosis in the sputum samples.Keywords: pulmonary TB, M.tuberculosis, TB-LAMP Abstrak: TB Paru saat ini masih menjadi ancaman dan termasuk 10 besar penyebab kematian teratas di dunia. Keterbatasan metode diagnostik merupakan salah satu hambatan dalam meningkatkan temuan kasus TB Paru. Saat ini WHO telah merekomendasikan metode Loop-Mediated Isothermal Amplification (LAMP-TB) yang memiliki sensitivitas, spesifitas, efisiensi tinggi, cepat dan sederhana dalam hal metode molekular untuk mengidentifikasi Mycobacterium tuberculosis. Penelitian ini bertujuan untuk mengetahui apakah teknik LAMP-TB dapat mendeteksi M.tuberculosis pada sampel sputum. Jenis penelitian ialah deskriptif observasional/survei dengan pendekatan uji diagnostik secara potong lintang pada pasien terduga TB Paru BTA negatif di RSUP Prof. Dr. R. D. Kandou Manado selama bulan September-Oktober 2017. Dari 25 sampel pasien terduga TB paru BTA negatif didapatkan sebagian besar berusia 52-64 tahun, berjenis kelamin laki-laki 18 orang (72%), dan konsistensi sputum purulen pada 14 sampel (56%). Pemeriksaan dengan menggunakan metode LAMP-TB mendapatkan 4 sampel (16%) dinyatakan positif mengandung M.tuberculosis dan 21 sampel (84%) dinyatakan negatif. Simpulan: Metode LAMP-TB dapat mendeteksi M.Tuberculosis dalam sampel sputum.Kata kunci: TB paru, M.tuberculosis, LAMP-TB


2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Sharana Mahomed ◽  
Nomonde R. Dlamini-Mvelase ◽  
Moses Dlamini ◽  
Koleka Mlisana

For the optimal recovery of Mycobacterium tuberculosis from the BACTEC™ Mycobacterium Growth Indicator Tube 960™ system, an incubation period of 42–56 days is recommended by the manufacturer. Due to logistical reasons, it is common practice to follow an incubation period of 42 days. We undertook a retrospective study to document positive Mycobacterium Growth Indicator Tube cultures beyond the 42-day incubation period. In total, 98/110 (89%) were positive for M. tuberculosis complex. This alerted us to M. tuberculosis growth detection failure at 42 days.


Author(s):  
Spenta Kakalia ◽  
Aparna Chakravarty ◽  
David Manson ◽  
Ray Lam ◽  
Valerie Waters ◽  
...  

Abstract In a retrospective study of adolescents with intrathoracic tuberculosis (TB), 26 out of the 81 (32%) patients had undergone chest computed tomography (CT). Chest CT was considered unnecessary in 7 (27%), necessary in 7 (27%), and possibly/probably helpful in 12 (46%). Promptly obtaining specimens for sputum smear microscopy, molecular testing, as well as culture for Mycobacterium tuberculosis could avoid several unnecessary CTs.


2001 ◽  
Vol 45 (6) ◽  
pp. 1934-1936 ◽  
Author(s):  
Ivan Bastian ◽  
Leen Rigouts ◽  
Juan Carlos Palomino ◽  
Françoise Portaels

ABSTRACT Two novel systems were evaluated for performing indirect kanamycin susceptibility tests on 72 strains of Mycobacterium tuberculosis. The microplate Alamar blue colorimetric method (breakpoint, 2.5 μg/ml) and the Mycobacterium Growth Indicator Tube (MGIT) system (breakpoint, 5.0 μg/ml) both produced 98.6% agreement when compared with the conventional proportion method performed on 7H10 agar using 5.0 μg of kanamycin/ml. Both systems provided results within an average of 1 week.


2019 ◽  
Vol 47 (1) ◽  
pp. 1-12
Author(s):  
Hana Krismawati ◽  
Antonius Oktavian ◽  
Lydia Chaidir ◽  
Evy Iriani Natalia ◽  
Melda Suebu ◽  
...  

Identification of the Mycobacterium tuberculosis strain found in pulmonary tuberculosis patients in Jayapura using Spolygotyping was carried out Patients with pulmonary tuberculosis are taken as an index case. Sputum samples were taken to be diagnosed with Acid Fast Staining and to culture M. tuberculosis bacteria using Lowensten Jansen solid media, Ogawa solid media and Mycobacterium Growth Indicator Tube liquid media. The patient's home visit was conducted to determine the environmental conditions of the patient's residence, interview the close contacts and test the bacterial infection M. tuberculosis in close contact cases using the Mantoux test. A thorax radiology of close contacts was carried out in the hospital's radiology unit. The results of spolygotyping showed 8%sputum samples M. tuberculosis of Beijing strain, while the rest are M. tuberculosis non Beijing strains. Among the 46 of Non-Beijing strains, the type U (likely S) is most transmitted by tuberculosis patients to their close contacts, which is as much as 6%. This study confirms the factors that influence tuberculosis transmission are the sleeping location of close contacts with the patients, the frequency of meetings that occur at least once or more in a day, density of house occupants and the presence of clinical symptoms of TB. Drugs Resistance Susceptibility test results showed that 12 patients were resistance to TB drugs and one of them was MDR TB from strain LAMP. Key words : tuberculosis transmission, Spolygotyping, tuberculosis, Jayapura, drugs resistance   Abstrak Identifikasi galur Mycobacterium tuberculosis yang ditemukan pada penderita tuberculosis paru di Jayapura telah dilakukan dengan menggunakan Spoligotyping Penderita tuberkulosis paru diambil sebagai kasus indeks. Sampel sputum juga diambil untuk didiagnosis dengan pengecatan Basil Tahan Asam dan kultur bakteri M.tuberculosis yang dilakukan pada media padat Lowensten Jansen, media padat Ogawa serta media cair Mycobacterium Growth Indicator Tube. Ekstraksi DNA dilakukan pada koloni Mycobacterium tuberculosis untuk dilakukan analisis spoligotyping. Kunjungan rumah pasien dilakukan untuk mengetahui kondisi lingkungan tempat tinggal pasien, mewawancara kontak kasus dan melakukan skrining infeksi bakteri M.tuberkulosis pada kasus kontak menggunakan tes Mantoux. Foto dada pada kontak kasus selanjutnya dilakukan di unit radiologi rumah sakit. Hasil spoligotyping menunjukkan 8% (4/50) sampel sputum penderita tuberkulosis adalah M.tuberculosis galur Beijing, sedangkan sisanya adalah M.tuberculosis galur Non Beijing. Dari 46 galur Non-Beijing, tipe U (likely S) paling banyak ditransmisikan oleh penderita tuberculosis pada kontaknya yaitu sebanyak 6% (3/50). Penelitian ini mengkonfirmasi faktor-faktor yang mempengaruhi transmisi tuberkulosis meliputi lokasi tidur kontak kasus yang serumah dengan penderita, frekuensi pertemuan yang terjadi sedikitnya sekali atau lebih dalam sehari, kondisi rumah padat penghuni dan adanya gejala klinis TB. Hasil uji resistensi menunjukkan 12 pasien mengalami resistensi terhadap OAT dan 1 diantaranya adalah MDR TB dari strain LAMP. Kata kunci : Transmisi, Splygotyping, Mycobacterium tuberculosis, tuberkulosis, Jayapura, resistensi


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