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Reviews of "Rapid Acquisition and Transmission of Drug Resistance Amongst Beijing Lineage Mycobacterium tuberculosis in Vietnam"

Reviewers: I Kontsevaya (Research Center Borstel) | 📘📘📘📘📘

Published onDec 21, 2022
Reviews of "Rapid Acquisition and Transmission of Drug Resistance Amongst Beijing Lineage Mycobacterium tuberculosis in Vietnam"
key-enterThis Pub is a Review of
Rapid Acquisition and Transmission of Drug Resistance Amongst Beijing Lineage Mycobacterium tuberculosis in Vietnam
Description

AbstractWhole genome sequencing (WGS) and phenotypic drug susceptibility testing was performed on a collection of 2,542Mycobacterium tuberculosis (Mtb)isolates from tuberculosis (TB) patients recruited in Ho Chi Minh City (HCMC), Vietnam, to investigateMtbdiversity, the prevalence and phylodynamics of drug resistance, andin silicoresistance prediction with sequencing data. Amongst isolates tested phenotypically against first-line drugs, we observed high rates of streptomycin [STR, 37.7% (N=573/1,520)] and isoniazid resistance [INH, 25.7% (N=459/1,786)], and lower rates of resistance to rifampicin [RIF, 4.9% (N=87/1,786)] and ethambutol [EMB, 4.2% (N=75/1,785)]. Resistance to STR and INH was predicted moderately well when applying the TB-Profiler algorithm to WGS data (sensitivities of 0.81 and 0.87 respectively), while resistance to RIF and EMB was predicted relatively poorly (sensitivities of 0.70 and 0.44 respectively). Rates of multidrug-resistance [(MDR, 3.9% (N=69/1,786)], and resistance to a number of second-line drugs [Para-aminosalicylic acid (29.6% N=79/267), Amikacin (15.4% N=41/267) and Moxifloxacin (21.3%), N=57/267], were found to be high within a global context. Comparing rates of drug resistance among lineages, and exploring the dynamics of resistance acquisition through time, suggest the Beijing lineage (lineage 2.2) acquiresde novoresistance mutations at higher rates and suffers no apparent fitness cost acting to impede the transmission of resistance. We infer resistance to INH and STR to have arisen earlier, on average, than resistance to RIF, and to be more widespread across the phylogeny. The high prevalence of ‘background’ INH resistance, combined with high rates of RIF mono-resistance (20.7%, N=18/87) suggests that rapid assays for INH resistance will be valuable in this setting. These tests will allow the detection of INH mono-resistance, and will allow MDR isolates to be distinguished from isolates with RIF mono-resistance.

To read the original manuscript, click the link above.

Reviewer 1 (Irina K…) | 📘📘📘📘📘

RR:C19 Strength of Evidence Scale Key

📕 ◻️◻️◻️◻️ = Misleading

📙📙 ◻️◻️◻️ = Not Informative

📒📒📒 ◻️◻️ = Potentially Informative

📗📗📗📗◻️ = Reliable

📘📘📘📘📘 = Strong

To read the reviews, click the links below. 


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