scholarly journals Prevalence of multidrug resistance in Mycobacterium tuberculosis isolates from HIV seropositive and seronegative patients with pulmonary tuberculosis in north India

2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Sunil Sethi ◽  
Abhishek Mewara ◽  
Sunil Kumar Dhatwalia ◽  
Harpal Singh ◽  
Rakesh Yadav ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Multidrug Resistance ◽  
Pulmonary Tuberculosis ◽  
North India ◽  
Hiv Seropositive

Distribution and association of Mycobacterium tuberculosis CAS lineage with multidrug resistance in North India

2016 ◽  
Vol 20 (6) ◽  
pp. 806-811 ◽  
Author(s):  
S. K. Dhatwalia ◽  
R. Yadav ◽  
D. Behera ◽  
S. M. Rudramurthy ◽  
H. Kaur ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Multidrug Resistance ◽  
North India

scholarly journals Molecular Characterization of Multidrug-Resistant Isolates of Mycobacterium tuberculosis from Patients in North India

2002 ◽  
Vol 46 (2) ◽  
pp. 443-450 ◽  
Author(s):  
Noman Siddiqi ◽  
Mohammed Shamim ◽  
Seema Hussain ◽  
Rakesh Kumar Choudhary ◽  
Niyaz Ahmed ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Multidrug Resistance ◽  
Binding Site ◽  
Hot Spot ◽  
Multidrug Resistant ◽  
North India ◽  
World Health ◽  
Silent Mutation ◽  
Common Mutation ◽  
Ribosomal Binding Site

ABSTRACT The World Health Organization has identified India as a major hot-spot region for Mycobacterium tuberculosis infection. We have characterized the sequences of the loci associated with multidrug resistance in 126 clinical isolates of M. tuberculosis from India to identify the respective mutations. The loci selected were rpoB (rifampin), katG and the ribosomal binding site of inhA (isoniazid), gyrA and gyrB (ofloxacin), and rpsL and rrs (streptomycin). We found known as well as novel mutations at these loci. Few of the mutations at the rpoB locus could be correlated with the drug resistance levels exhibited by the M. tuberculosis isolates and occurred with frequencies different from those reported earlier. Missense mutations at codons 526 to 531 seemed to be crucial in conferring a high degree of resistance to rifampin. We identified a common Arg463Leu substitution in the katG locus and certain novel insertions and deletions. Mutations were also mapped in the ribosomal binding site of the inhA gene. A Ser95Thr substitution in the gyrA locus was the most common mutation observed in ofloxacin-resistant isolates. A few isolates showed other mutations in this locus. Seven streptomycin-resistant isolates had a silent mutation at the lysine residue at position 121. While certain mutations are widely present, pointing to the magnitude of the polymorphisms at these loci, others are not common, suggesting diversity in the multidrug-resistant M. tuberculosis strains prevalent in this region. Our results additionally have implications for the development of methods for multidrug resistance detection and are also relevant in the shaping of future clinical treatment regimens and drug design strategies.

scholarly journals Mycobacterial Etiology of Pulmonary Tuberculosis and Association with HIV Infection and Multidrug Resistance in Northern Nigeria

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Gambo Aliyu ◽  
Samer S. El-Kamary ◽  
Alash'le Abimiku ◽  
Nicholas Ezati ◽  
Iwakun Mosunmola ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Mycobacterium Tuberculosis ◽  
Multidrug Resistance ◽  
Pulmonary Tuberculosis ◽  
Hiv Infection ◽  
Mycobacterium Bovis ◽  
Northern Nigeria ◽  
Tb Treatment ◽  
Mycobacterium Africanum

Objective. Data on pulmonary tuberculosis (TB) caused byMycobacterium tuberculosis (MTB) complexin Nigeria are limited. We investigated species ofMTB complexin TB cases from northern Nigeria.Methods. New TB suspects were enrolled, screened for HIV and their sputum samples were cultured after routine microscopy. Genotypes MTBC and MTBDRpluswere used to characterize theMTB complexspecies and their resistance to isoniazid and rifampicin.Results. Of the 1,603 patients enrolled, 375 (23%) hadMTB complexinfection: 354 (94.4%) hadMycobacterium tuberculosis; 20 (5.3%) hadMycobacterium africanum; and one hadMycobacterium bovis(0.3%). Cases were more likely to be male (AOR = 1.87, 95% CI : 1.42–2.46;P≤0.001), young (AOR = 2.03, 95% CI : 1.56–2.65;P≤0.001) and have HIV (AOR = 1.43, 95% CI : 1.06–1.92;P=0.032). In 23 patients (6.1%), the mycobacterium was resistant to at least one drug, and these cases were more likely to have HIV and prior TB treatment (AOR = 3.62, 95% CI : 1.51–8.84;P=0.004; AOR : 4.43; 95% CI : 1.71–11.45P=0.002resp.), compared to cases without any resistance.Conclusion.Mycobacterium tuberculosisremained the predominant specie in TB in this setting followed byMycobacterium africanumwhileMycobacterium boviswas rare. The association of TB drug resistance with HIV has implications for TB treatment.

scholarly journals Genetic variability in multidrug-resistant Mycobacterium tuberculosis isolates from patients with pulmonary tuberculosis in North India

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ajay Vir Singh ◽  
Suman Singh ◽  
Anjali Yadav ◽  
Shweta Kushwah ◽  
Rajbala Yadav ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Mycobacterium Tuberculosis ◽  
Genetic Variability ◽  
Pulmonary Tuberculosis ◽  
Control Strategies ◽  
Multidrug Resistant ◽  
North India ◽  
Drug Resistant ◽  
High Genetic Diversity ◽  
Mdr Tb

Abstract Background Information on the genetic variability of drug resistant isolates of Mycobacterium tuberculosis is of paramount importance to understand transmission dynamics of disease and to improve TB control strategies. Despite of largest number of multidrug-resistant (MDR) tuberculosis cases (1, 30,000; 27% of the global burden), strains responsible for the expansion or development of drug-resistant Mycobacterium tuberculosis infections have been poorly characterized in India. Present study was aimed to investigate the genetic diversity in MDR isolates of Mycobacterium tuberculosis in North India. Results Spacer oligonucleotide typing (spoligotyping) was performed on 293 clinical MDR isolates of Mycobacterium tuberculosis recovered from cases of pulmonary tuberculosis from North India. Spoligotyping identified 74 distinct spoligotype patterns. Comparison with an international spoligotype database (spoldb4 database) showed that 240 (81.91%) and 32 (10.92%) strains displayed known and shared type patterns, while 21 (7.16%) strains displayed unique spoligotype patterns. Among the phylogeographic lineages, lineage 3 (East African-Indian) was found most predominant lineage (n = 159, 66.25%), followed by lineage 2 (East Asian; n = 34, 14.16%), lineage 1 (Indo-Oceanic; n = 30, 12.50%) and lineage 4 (Euro American; n = 17, 7.08%). Overall, CAS1_DEL (60.41%; SITs 2585, 26, 2694, 309, 381, 428, 1401, 141, 25, 1327) was found most pre-dominant spoligotype pattern followed by Beijing (14.16%; SITs255, 260, 1941, 269) and EAI3_IND (5.00%; SITs 298, 338, 11). The demographic and clinical characteristics were not found significantly associated with genotypic lineages of MDR-M.tuberculosis isolates recovered from pulmonary TB patients of North India. Conclusions Present study reveals high genetic diversity among the Mycobacterium tuberculosis isolates and highlights that SIT141/CAS1_Del followed by SIT26/ Beijing lineage is the most common spoligotype responsible for the development and transmission of MDR-TB in North India. The high presence of shared type and unique spoligotype patterns of MDR strains indicates epidemiological significance of locally evolved strains in ongoing transmission of MDR-TB within this community which needs to be further monitored using robust molecular tools with high discriminatory power.

Detection of Mycobacterium tuberculosis in smear negative sputum by PCR

2012 ◽  
Vol 6 (2) ◽  
pp. 2-6 ◽  
Author(s):  
Mohammad Jobayer ◽  
SM Shamsuzzaman ◽  
Kazi Zulfiquer Mamun
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Pulmonary Tuberculosis ◽  
Accurate Method ◽  
Major Health Problem ◽  
Major Health ◽  
Tuberculosis Patients ◽  
Diagnostic Potential ◽  
Total Death ◽  
Smear Negative ◽  
Negative Sputum

Pulmonary tuberculosis is a major health problem in Bangladesh that is responsible for about 7% of total death in a year. This study was conducted to isolate and identify Mycobacterium tuberculosis from sputum and to evaluate the efficacy of PCR as a modern diagnostic tool, for diagnosis of pulmonary tuberculosis, especially in the smear negative cases. One hundred and fifty suspected pulmonary TB patients (male/ female: 97/53) were included in this study. Single morning sputum was collected from each patient and diagnostic potential of PCR was compared with staining and culture. Twenty five (16.7%) sputum were positive by ZN stained smear. Among 125 smear negative samples, 13 (10.4%) yielded growth in culture in LJ media and 21 (16.8%) samples were positive by PCR. The sensitivity and specificity of PCR in smear negative cases was 100% and 92.9% respectively. Mean detection time in PCR was 24 hours. PCR detected M. tuberculosis in 21 smear negative and 9 culture negative samples. For diagnosis of tuberculosis in smear negative cases, PCR directly from sputum was a very sensitive and accurate method. In conclusion, PCR may be done, especially in clinically suspected pulmonary tuberculosis patients who remain negative by conventional methods.DOI: http://dx.doi.org/10.3329/bjmm.v6i2.19368 Bangladesh J Med Microbiol 2012; 06(02): 2-6

Determination some Immunological Aspects in Pulmonary Tuberculosis Patients in Qadisiyah Province

2018 ◽  
Vol 9 (2) ◽  
Author(s):  
Syoof Khowman Alramahy ◽  
Akram Hadi Hamza
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Pulmonary Tuberculosis ◽  
Statistical Difference ◽  
Positive Culture ◽  
Control Group ◽  
Tuberculosis Patients ◽  
Significant Difference ◽  
Lowenstein Jensen ◽  
The Mean ◽  
Igg Level

This study was carried out to study of some immunological aspects among the pulmonary Tuberculosis patients infected with causative agent, Mycobacterium tuberculosis. A Total of 200 sputum samples were collected from patients attending the consultant Clinic for Chest and Respiratory disease center, Diwaniya. Control group (No=15) also included. According to acid fast stain of sputum, the patients were classified as positive (No=91,45.5%) and negative (No=109,54.5, Lowenstein Jensen medium used for the cultivation of samples, on which 70% of sputum samples where positive culture for this microorganism. The grown microorganism were identified as M. tuberculosis, based on positive A.F.B, Niacin producers ,negative for catlase at 68c. The mean IgG level was l184.053±76.684 mg/100 ml in tuberculosis group compared with 1016.533 ± 44.882 mg/100ml in control group, rendering the statistical difference significant. For IgA and IgM levels, they were at mean of 315.880±38.552 mg/100 ml and 119.527±8.464 mg/100 ml in control group compared with 396.358±38.776 mg/100 ml and 134.207±11.696 mg/100 ml in patients group respectively with significant difference

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