Epidemiological Characteristics and Risk Factors Related to Drug-resistant Tuberculosis in Luanda, Angola

2022 ◽  
Author(s):  
Cruz S. Sebastião ◽  
João Samulengo ◽  
Euclides Sacomboio ◽  
Ngiambudulu M. Francisco ◽  
Carlos Teixeira ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Medical Records ◽  
Capital City ◽  
Health Concern ◽  
Drug Resistant ◽  
Hiv Status ◽  
Tb Control ◽  
Resistant Tuberculosis ◽  
Resource Limited ◽  
Epidemiological Characteristics

Tuberculosis (TB) is a major cause of illness and public health concern, especially in resource-limited countries. This study analyzed the characteristics related to anti-TB drug resistance. Moreover, we examined the evidence-based indications for the treatment of active TB in Angola. This study evaluated the medical records of 176 patients screened for TB from January to September 2016 in Luanda, the capital city of Angola. Approximately 66.5% of the patients were newly diagnosed with active TB. The residence area showed a significant relationship with TB (P = 0.025), whereas age group (P = 0.272), gender (P = 0.853), and HIV status (P = 0.284) did not showed any relationship with TB. Overall, 72.4% of TB patients had resistance to at least one of the anti-TB drugs. The risk of anti-TB drug resistance was higher in males (odds ratio [OR]: 1.22; 95% confidence interval [CI]: 0.42–3.58, P = 0.685] and in TB-HIV coinfected patients [OR: 1.39; (95% CI: 0.26–7.28), P = 0.700], whereas it was lower in patients aged 30 years or older (OR: 0.56; 95% CI: 0.18–1.69) P = 0.303) and in patients living in urbanized areas (OR: 0.74; 95% CI: 0.17–3.25; P = 0.685). Our findings showed that drug-resistant TB is emerging in Angola. Further studies on factors related to anti-TB drug resistance are urgently needed to ascertain the magnitude of the problem and to proffer strategies toward TB control in Angola.

scholarly journals A Rapid Drug Resistance Genotyping Workflow for Mycobacterium tuberculosis, Using Targeted Isothermal Amplification and Nanopore Sequencing

2021 ◽  
Author(s):  
Harriet D. Gliddon ◽  
Dan Frampton ◽  
Vanisha Munsamy ◽  
Jude Heaney ◽  
Thomas Pataillot-Meakin ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Mycobacterium Tuberculosis ◽  
Nanopore Sequencing ◽  
Drug Resistant ◽  
Resource Limited Settings ◽  
Drug Resistant Tuberculosis ◽  
Resistant Tuberculosis ◽  
Resource Limited ◽  
Drug Resistance Genotyping ◽  
High Level

Current methods for diagnosing drug-resistant tuberculosis are time consuming, resulting in delays in patients receiving treatment and in transmission onwards. They also require a high level of laboratory infrastructure, which is often only available at centralized facilities, resulting in further delays to diagnosis and additional barriers to deployment in resource-limited settings.

scholarly journals Prevalence of Drug-Resistant Tuberculosis in Sudan: A Systematic Review and Meta-Analysis

Antibiotics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 932
Author(s):  
Khalid Hajissa ◽  
Mahfuza Marzan ◽  
Mubarak Ibrahim Idriss ◽  
Md Asiful Islam
Keyword(s):  
Systematic Review ◽  
Drug Resistance ◽  
Meta Analysis ◽  
Treatment Strategies ◽  
Drug Resistant ◽  
Drug Resistant Tuberculosis ◽  
Tb Control ◽  
Resistant Tuberculosis ◽  
Pooled Prevalence ◽  
Critical Issues

Drug-resistant tuberculosis (DR-TB) is still one of the most critical issues impeding worldwide TB control efforts. The aim of this systematic review and meta-analysis was to give an updated picture of the prevalence of DR-TB in Sudan. A comprehensive systematic search was performed on four electronic databases (PubMed, Scopus, Web of Science and Google Scholar) to identify all published studies reporting prevalence data of DR-TB in Sudan. Sixteen eligible studies published during 2002–2020 were included. Using meta-analysis of proportions, the pooled prevalence of TB cases with resistance to any anti-TB drugs was 47.0% (95% CI: 35.5–58.6%). The overall prevalence of mono, multi, poly and extensive drug resistance were estimated to be 16.2% (95% CI: 9.0–23.4%), 22.8% (95% CI: 16.0–29.7%), 6.8% (95% CI: 0.5–13.0%) and 0.7% (95% CI: 0–2.1%), respectively. Considering any first-line anti-TB drugs, the resistance prevalence was highest for isoniazid (32.3%) and streptomycin (31.7%), followed by rifampicin (29.2%). In contrast, resistance against second-line drugs was reported for only two antibiotics, namely, ofloxacin (2.1%) and kanamycin (0.7%). Of note, the resistance profile of the previously treated patients was found to be remarkably high compared with the newly diagnosed TB patients. The relatively high prevalence estimation of anti-TB drug resistance warrants strengthening TB control and treatment strategies in Sudan.

scholarly journals Anti-Mycobacterial Drug Resistance in Japan: How to Approach This Problem?

Antibiotics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 19
Author(s):  
Keisuke Kamada ◽  
Satoshi Mitarai
Keyword(s):  
Drug Resistance ◽  
Time Course ◽  
Antimicrobial Agents ◽  
Treatment Success ◽  
Drug Susceptibility Testing ◽  
Health Concern ◽  
Drug Resistant ◽  
Drug Resistant Tuberculosis ◽  
Resistant Tuberculosis ◽  
Long Term Treatment

Mycobacteriosis is mainly caused by two groups of species: Mycobacterium tuberculosis and non-tuberculosis mycobacteria (NTM). The pathogens cause not only respiratory infections, but also general diseases. The common problem in these pathogens as of today is drug resistance. Tuberculosis (TB) is a major public health concern. A major challenge in the treatment of TB is anti-mycobacterial drug resistance (AMR), including multidrug-resistant tuberculosis and extensively drug-resistant tuberculosis. Recently, the success rate of the treatment of drug-resistant tuberculosis (DR-TB) has improved significantly with the introduction of new and repurposed drugs, especially in industrialized countries such as Japan. However, long-term treatment and the adverse events associated with the treatment of DR-TB are still problematic. To solve these problems, optimal treatment regimens designed/tailor-made for each patient are necessary, regardless of the location in the world. In contrast to TB, NTM infections are environmentally oriented. Mycobacterium avium-intracellulare complex (MAC) and Mycobacterium abscessus species (MABS) are the major causes of NTM infections in Japan. These bacteria are naturally resistant to a wide variation of antimicrobial agents. Macrolides, represented by clarithromycin (CLR) and amikacin (AMK), show relatively good correlation with treatment success. However, the efficacies of potential drugs for the treatment of macrolide-resistant MAC and MABS are currently under evaluation. Thus, it is particularly difficult to construct an effective treatment regimen for macrolide-resistant MAC and MABS. AMR in NTM infections are rather serious in Japan, even when compared with challenges associated with DR-TB. Given the AMR problems in TB and NTM, the appropriate use of drugs based on accurate drug susceptibility testing and the development of new compounds/regimens that are strongly bactericidal in a short-time course will be highly expected.

scholarly journals Drug susceptibility testing and mortality in patients treated for tuberculosis in high-burden countries

2018 ◽  
Author(s):  
Kathrin Zürcher ◽  
Marie Ballif ◽  
Lukas Fenner ◽  
Sonia Borrell ◽  
Peter M. Keller ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Susceptibility Testing ◽  
Drug Susceptibility ◽  
Drug Susceptibility Testing ◽  
Reference Laboratory ◽  
Drug Resistant ◽  
Hiv Status ◽  
Resistant Tuberculosis ◽  
Resistant Strains ◽  
Drug Resistant Strains

ABSTRACTBackgroundDrug resistance and HIV co-infection are challenges for the global control of tuberculosis.MethodsWe collected Mycobacterium tuberculosis isolates from adult patients in Côte d’Ivoire, Democratic Republic of the Congo, Kenya, Nigeria, South Africa, Peru, and Thailand, stratified by HIV status and tuberculosis drug resistance. Molecular or phenotypic drug susceptibility testing (DST) was done locally and at the Swiss tuberculosis reference laboratory. We examined mortality during treatment according to DST results and treatment adequacy in logistic regression models adjusting for sex, age, sputum microscopy and HIV status.Findings634 tuberculosis patients were included; median age was 33.2 years, 239 (37.7%) were female, 272 (42.9%) HIV-positive and 69 (10.9%) patients died. Based on the reference laboratory DST, 394 (62.2%) strains were pan-susceptible, 45 (7.1%) mono-resistant, 163 (25.7%) multidrug-resistant (MDR-TB), and 30 (4.7%) had pre-extensive or extensive drug resistance (pre-XDR/XDR-TB). Results of reference and local laboratories were discordant in 121 (19.1%) cases, corresponding to a sensitivity of 84.3% and a specificity of 90.8%. In patients with drug-resistant tuberculosis, discordant results were associated with increased mortality (risk ratio 1.81; 95% CI 1.07-3.07). In logistic regression, compared to adequately treated patients with pan-susceptible strains, the adjusted odds ratio for death was 4.23 (95% CI 2.16-8.29) for adequately treated patients with drug-resistant strains and 21.54 (95% CI 3.36-138.1) for inadequately treated patients with drug-resistant strains. HIV status was not associated with mortality.InterpretationUsing a reference laboratory standard, inaccurate DST leading to inappropriate treatment of drug-resistant tuberculosis, but not HIV infection, contributed to mortality.

scholarly journals Risk factors for drug-resistant tuberculosis, the association between comorbidity status and drug-resistant patterns: a retrospective study of previously treated pulmonary tuberculosis in Shandong, China, during 2004–2019

BMJ Open ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. e044349
Author(s):  
Ning-ning Tao ◽  
Yi-fan Li ◽  
Wan-mei Song ◽  
Jin-yue Liu ◽  
Qian-yun Zhang ◽  
...  
Keyword(s):  
Risk Factors ◽  
Drug Resistance ◽  
Retrospective Study ◽  
Pulmonary Tuberculosis ◽  
Logistic Models ◽  
Smoking History ◽  
Categorical Variables ◽  
Drug Resistant ◽  
Drug Resistant Tuberculosis ◽  
Resistant Tuberculosis

ObjectiveThis study was designed to identify the risk factors for drug-resistant tuberculosis (DR-TB) and the association between comorbidity and drug resistance among retreated pulmonary tuberculosis (PTB).DesignA retrospective study was conducted among all the 36 monitoring sites in Shandong, China, over a 16-year period. Baseline characteristics were collected from the TB Surveillance System. Categorical variables were compared by Fisher’s exact or Pearson’s χ2 test. The risk factors for drug resistance were identified using univariable analysis and multivariable logistic models. The influence of comorbidity on different types of drug resistance was evaluated by performing multivariable logistic models with the covariates adjusted by age, sex, body mass index, drinking/smoking history and cavity.ResultsA total of 10 975 patients with PTB were recorded during 2004–2019, and of these 1924 retreated PTB were finally included. Among retreated PTB, 26.2% were DR-TB and 12.5% had comorbidity. Smoking (adjusted OR (aOR): 1.69, 95% CI 1.19 to 2.39), cavity (aOR: 1.55, 95% CI 1.22 to 1.97) and comorbidity (aOR: 1.44, 95% CI 1.02 to 2.02) were risk factors for DR-TB. Of 504 DR-TB, 9.5% had diabetes mellitus, followed by hypertension (2.0%) and chronic obstructive pulmonary disease (1.8%). Patients with retreated PTB with comorbidity were more likely to be older, have more bad habits (smoking, alcohol abuse) and have clinical symptoms (expectoration, haemoptysis, weight loss). Comorbidity was significantly associated with DR-TB (aOR: 1.44, 95% CI 1.02 to 2.02), overall rifampin resistance (aOR: 2.17, 95% CI 1.41 to 3.36), overall streptomycin resistance (aOR: 1.51, 95% CI 1.00 to 2.27) and multidrug resistance (aOR: 1.96, 95% CI 1.17 to 3.27) compared with pan-susceptible patients (p<0.05).ConclusionSmoking, cavity and comorbidity lead to an increased risk of drug resistance among retreated PTB. Strategies to improve the host’s health, including smoking cessation, screening and treatment of comorbidity, might contribute to the control of tuberculosis, especially DR-TB, in China.

scholarly journals Primary Drug-Resistant Tuberculosis in the Elderly in Shandong,China,from 2004 - 2019.

2020 ◽  
Author(s):  
Qiqi An ◽  
Wan-mei Song ◽  
Jin-yue Liu ◽  
Ning-ning Tao ◽  
Yao Liu ◽  
...  
Keyword(s):  
Elderly Patients ◽  
The Elderly ◽  
Drug Susceptibility ◽  
Drug Resistant ◽  
Chi Square ◽  
Susceptibility Data ◽  
Resistant Tuberculosis ◽  
Mdr Tb ◽  
Epidemiological Characteristics ◽  
Descriptive Statistical Analysis

Abstract Background: With an aging population, China is facing a huge buedern of elderly patients with drug resistant tuberculosisi (DR-TB), which has become an significant obscale for the global TB control targets. There is still few study on DR-TB among China so far.Thus, more researches on the epidemiological characteristics and trend of primary DR-TB among the elderly will be necessary. Methods: A retrospective study was conducted in Shandong, China from 2004-2019, 12661 primary TB and 4368 elderly (≥60 years of age) primary TB cases were involved. Clinical characteristics including age, sex, Cavity, Smoking, drinking, comorbidity and drug susceptibility data were included. Descriptive statistical analysis, Chi-square and linear regression were used for analyzing.Results: Among 4368 elderly patients with primary TB, the DR-TB and MDR-TB accounted for 17.19% and 2.29% respectively. During 2004 to 2019, the proportions of MDR-TB, PDR-TB, RFP-resistance increased by160.00%, 18.18%, 231.82%, and the rate of DR-TB among elderly patients with primary cavitary TB increased by 255%.Among the elderly with primary DR-TB, the proportion of male (from 85.19 to 89.06), cavity (from 7.41 to 46.88), RFP (from 3.70 to 21.88), SM (from 37.04 to 62.5) increased significantly(P<0.05) . And the proportion of female (from 14.81 to 10.94), non-cavity (from 92.59 to 32.81 ), INH (from 66.67 to 57.81 ) decreased significantly. (P<0.05) .Conclusion: Among the elderly, the proportions of MDR-TB, PDR-TB,RFP-resistance and cavitary DR-TB increased significantly. The pattern of DR-TB changed from female, non-cavity and INH-resistant groups to male, cavity and RFP, SM-resistant groups. For a better control on the elderly DR-TB in the future, we should pay more attention to, male, smoking, drinking, COPD and diabetes subgroups.

scholarly journals A STUDY ON LIVER FUNCTION TEST PROFILE OF 2ND LINE DRUGS IN MULTI DRUG RESISTANT (MDR) AND EXTENSIVELY DRUG RESISTANT (XDR) TUBERCULOSIS CASES REGISTERED UNDER DR-TB CENTRE IN A TERTIARY CARE HOSPITAL

2020 ◽  
pp. 1-3
Author(s):  
Rupam Kumar Ta ◽  
Pronoy Sen
Keyword(s):  
Adverse Drug Reactions ◽  
Initial Period ◽  
Care Hospital ◽  
Drug Resistant ◽  
Drug Reactions ◽  
Drug Resistant Tuberculosis ◽  
Intensive Phase ◽  
Tb Control ◽  
Resistant Tuberculosis ◽  
Extensively Drug Resistant

BACKGROUND: The emergence of drug resistant mycobacterium has become a signicant public health problem creating an obstacle to effective Tuberculosis (TB) control. Freedom from TB is possible with timely, regular, complete treatment, with assurance, prevention and management of side effects of antitubercular drugs. Present study was conducted to evaluate common and rare adverse drug reactions (ADR) of CAT IV and CAT V to analyse demographic, radiological and bacteriological prole and treatment outcome in MDR &XDR patients. Aims and Objectives- To evaluate the common and rare adverse drug reactions of intensive phase treatment of Multi Drug Resistant Tuberculosis (MDR) and Extensively Drug Resistant Tuberculosis (XDR) as per WHO-UMC Causality Assessment Scale. METHODS: 76 patients of MDR and XDR Tuberculosis were admitted in DR-TB (Drug Resistant TB) centre, Burdwan Medical College and Hospital and the adverse drug reaction prole of 2nd line drugs were analysed during the intensive phase for a year after fullling the inclusion and exclusion criteria. Treatment was given as per guidelines by Revised National TB Control Program PMDT (Programmatic management of drug-resistant TB). RESULTS:Adverse drug reactions on GI system were nausea 73 patients (96.10%), vomiting 70 (92.10%), acidity 41 (53.9%), and sulphurous belching and hepatitis 1 (1.31%) each. CONCLUSIONS: The reactions were common in rst 60 days of the regimen and in patients with BMI ≤18. Hence vigilant monitoring is required for these types of patients during the initial period and sputum smear and culture conversion is very well correlated with clinical and radiological improvement.

scholarly journals Mycobaterial interspersed repetitive units-variable number of tandem repeats analysis and pattern of drug resistance in extended drug resistant (XDR) TB isolates from pulmonary tuberculosis patients in Bangladesh

2020 ◽  
Vol 46 (1) ◽  
pp. 22-28
Author(s):  
Shirin Tarafder ◽  
Md Bayzid Bin Monir
Keyword(s):  
Drug Resistance ◽  
Molecular Typing ◽  
Tandem Repeats ◽  
Variable Number ◽  
Drug Resistant ◽  
Gyra Gene ◽  
Drug Resistant Tuberculosis ◽  
Tree Analysis ◽  
Resistant Tuberculosis ◽  
Mdr Tb

Background: To investigate the spread of specific genotypes in a defined geographical area and to determine any relationship of these genotypes with drug resistance the most essential method is molecular typing. It allows a rapid and precise species differentiation. Objective: This study was intended to observe the genotypes of XDR mycobacterium tuberculosis by determining 24 loci MIRU-VNTR analysis. Methods: To gain an insight about molecular typing of MTB and drug resistance-associated mutations in XDR-TB isolates a total of 98 multi drug resistant tuberculosis (MDR-TB) isolates collected through Xpert MTB/RIF assay. They were subjected to 2nd line (Fluoroquinolones, kanamycin, capreomycin and amikacin) drug susceptibility testing through line probe assay (LPA) in a view to detect extensively drug resistant tuberculosis (XDR-TB). Genotyping was done for XDR-TB isolates using 24 loci Mycobacterial Interspersed Repetitive Units-Variable Number of Tandem Repeats (MIRU-VNTR) using the online tool at http://www.MIRU-VNTRplus.org.. Out of 98 MDR-TB isolates 11(11.23%)  XDR-TB isolates were typed and analysed. Results: Twenty four loci MIRU-VNTR genotyping involving similarity searching and phylogenetic tree analysis revealed that six (54.60%) XDR-TB isolates belonged to Beijing strain, Other MTB strain also detected were Delhi/CAS two(18.20%), Haarlem two(18.20%) and New-1, one (9.10%) in number. Minimum spanning tree analysis showed two strain of Beijing family form a clonal complex. Beijing strains were more common among younger age group and within urban population. Beijing strains were also predominant in treatment failure patient. Only one new case of XDR-TB belongs to Delhi/CAS family. Second line mycobacterial drug resistance (MTBDRsl) detected by LPA showed the most prevalent mutations involved in Fluoroquinolones drug resistance (FQ) was Asp94Gly in gyrA gene (54.55%) in quinolone resistance determining region (QRDR) and for Injectable 2nd line Drug resistance (ISL) was A1401G, C1402T in 16S rrs gene (100%)..  All XDR-TB isolates showed resistance to Levofloxacin in 2nd line LPA but Moxifloxacin showed low level resistance to some cases. Conclusion: Molecular typing of XDR- TB isolates and pattern of drug resistance associated mutations in XDR-TB isolates in Bangladesh have not been reported previously. The result of this study highlights the need to reinforce the TB policy in Bangladesh with regard to control the spread and transmission as well as detection and treatment strategies regarding XDR-TB. Bangladesh Med Res Counc Bull 2020; 46(1): 22-28

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