scholarly journals Emergence of multidrug resistance and extensive drug resistance among enterococcal clinical isolates in Egypt

2019 ◽  
Vol Volume 12 ◽  
pp. 1113-1125 ◽  
Author(s):  
Heba Shehta Said ◽  
Eman Salama Abdelmegeed
Keyword(s):  
Drug Resistance ◽  
Multidrug Resistance ◽  
Clinical Isolates ◽  
Extensive Drug Resistance

Investigation of Extensive Drug Resistance in Multidrug Resistance Tuberculosis Isolates

2013 ◽  
pp. 59-70 ◽  
Author(s):  
Bayhan BEKTÖRE ◽  
Tunçer HAZNEDAROĞLU ◽  
Orhan BAYLAN ◽  
Mustafa ÖZYURT ◽  
Nuri ÖZKÜTÜK ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Multidrug Resistance ◽  
Extensive Drug Resistance

scholarly journals Whole genomic sequencing as a tool for diagnosis of drug and multidrug-resistance tuberculosis in an endemic region in Mexico

2019 ◽  
Author(s):  
Carlos Francisco Madrazo-Moya ◽  
Irving Cancino-Muñoz ◽  
Betzaida Cuevas-Cordoba ◽  
Vanessa Gonzalez-Covarrubias ◽  
Martín Barbosa-Amezcua ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Multidrug Resistance ◽  
Multidrug Resistant ◽  
Genetic Distances ◽  
Clinical Isolates ◽  
Epidemiological Surveillance ◽  
Drug Resistant ◽  
Second Line ◽  
Endemic Region ◽  
Phenotypic Profile

AbstractBackgroundWhole genome sequencing (WGS) has been proposed as a tool for diagnosing drug resistance in tuberculosis. However, reports of its effectiveness in endemic countries with important numbers of drug resistance are scarce. The goal of this study was to evaluate the effectiveness of this procedure in isolates from a tuberculosis endemic region in Mexico.MethodsWGS analysis was performed in 81 tuberculosis positive clinical isolates with a known phenotypic profile of resistance against first-line drugs (isoniazid, rifampin, ethambutol, pyrazinamide and streptomycin). Mutations related to drug resistance were identified for each isolate; drug resistant genotypes were predicted and compared with the phenotypic profile. Genotypes and transmission clusters based on genetic distances were also characterized.FindingsPrediction by WGS analysis of resistance against isoniazid, rifampicin, ethambutol, pyrazinamide and streptomycin showed sensitivity values of 84%, 96%, 71%, 75% and 29%, while specificity values were 100%, 94%, 90%, 90% and 98%, respectively. Prediction of multidrug resistance showed a sensitivity of 89% and specificity of 97%. Moreover, WGS analysis revealed polymorphisms related to second-line drug resistance, enabling classification of eight and two clinical isolates as pre- and extreme drug-resistant cases, respectively.Four lineages were identified in the population (L1, L2, L3 and L4). The most frequent of these was L4, which included 90% (77) of the isolates. Six transmission clusters were identified; the most frequent was TC6, which included 13 isolates with a L4.1.1 and a predominantly multidrug-resistant condition.ConclusionThe results illustrate the utility of WGS for establishing the potential for prediction of resistance against first and second line drugs in isolates of tuberculosis from the region. They also demonstrate the feasibility of this procedure for use as a tool to support the epidemiological surveillance of drug- and multidrug-resistant tuberculosis.

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