Lancet Infect. MIC breakpoint concentrations were defined as 0.2 mg/L for isoniazid (INH), 1.0 mg/L for rifampicin (RIF), 5.0 mg/L for ethambutol (EMB), 1.0 mg/L for levofloxacin (LFX), 4.0 mg/L for amikacin (AMK), and 4.0 mg/L for capreomycin (CAP). Bao H, Liu K, Wu Z, Wang X, Chai C, He T, Wang W, Wang F, Peng Y, Chen B, Jiang J. BMC Infect Dis. N. Engl. 52, 638–641. ZZ, FH, JS, GJ, and GD interpreted the data. 10.1016/j.tube.2013.03.004 Elevated rates of reinfection tuberculosis in various hyperendemic regions have been reported and, in particular, it has been shown that in a high-incidence setting near Cape Town, South Africa, the rate of reinfection tuberculosis (TB) disease after cure of a previous TB disease episode is about four times greater than the rate of first-time TB disease. The 100-bp DNA ladder (Transgene, Beijing, China) was loaded into wells of every fourth lane to serve as a size marker. (2015). Antimicrob. Third, as an important action of FQs on bacteria, FQs are effective inducers of the SOS DNA repair system, which is associated with an elevated mutation rate (Ysern et al., 1990). No use, distribution or reproduction is permitted which does not comply with these terms.

12, 1776–1778. Clin. Bandera A, Gori A, Catozzi L, Degli Esposti A, Marchetti G, Molteni C, Ferrario G, Codecasa L, Penati V, Matteelli A, Franzetti F. J Clin Microbiol.

HHS Reinfection TB was defined as a recurrent TB episode in which the strains of the separate episodes differed by more than four bands. 54 593–602. Of MTB isolates obtained from the 37 relapse cases, 11 exhibited conversion from susceptible to resistance to at least one antibiotic, with the most frequent emergence of drug resistance observed to be levofloxacin. Get the latest research from NIH: https://www.nih.gov/coronavirus. On one hand, this observation may result from more frequent social communication between men that leads to an increased risk of TB overexposure, especially for patients living in settings with high TB prevalence. A causal association with HIV infection could not be confirmed. PLoS Med. Global Tuberculosis Report 2016. doi: 10.1016/j.tube.2013.03.004, PubMed Abstract | CrossRef Full Text | Google Scholar, Cox, H., Kebede, Y., Allamuratova, S., Ismailov, G., Davletmuratova, Z., Byrnes, G., et al.

-, Int J Tuberc Lung Dis.

We further compared characteristics between relapse cases and reinfection cases. In contrast, the other 21 pairs of isolates exhibited different 24-locus MIRU-VNTR patterns for two or more loci between the first and second episode and were therefore classified as reinfection cases (Velayutham et al., 2018). 49, 1331–1338. [Recurrent tuberculosis: relapse or reinfection?]. Mutagenesis 5, 63–66. COVID-19 is an emerging, rapidly evolving situation. FIGURE 3. Time period: 1995-2010. J. Antimicrob.
Measurements and Main Results: 612 of 897 (68%) patients had a DNA fingerprint available at enrollment. The results showed that 21 (36.2%, n = 21/58) pairs of isolates exhibited consistent MIRU-VNTR patterns, while 16 pairs (27.6%, n = 16/58) exhibited different patterns between episodes after testing of only one locus. Transmission of Mycobacterium tuberculosis in China: a population-based molecular epidemiologic study. However, TB relapses occurred until 4 years after the first episode. Remarkably, reinfection episodes were more likely to exhibit resistance to both RIF and EMB, with one-fifth of MTB isolates from reinfection cases exhibiting this resistance profile. For reinfection cases, reemergence of rifampicin-resistant isolates harboring double gene mutations, of codon 531 of rpoB and codon 306 of embB, were observed. For relapse cases, changes in LFX susceptibility were mainly due to a mutation in codon 94 of gyrA (50%, n = 3/6) that resulted in amino acid substitution from Asp to Gly. After India and Indonesia, China has the third highest TB burden globally (World Health Organization [WHO], 2016), although during the past 20 years China has achieved great progress in halving its TB prevalence (Wang et al., 2014).

Recurrence in tuberculosis: relapse or reinfection? Please enable it to take advantage of the complete set of features! Tuberculosis 94 159–161. Lancet Respir.

All DNA fragments amplified from isolates were analyzed by DNA sequencing and the results are summarized in Table 3. Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. eCollection 2020. The development of molecular genotyping methods for differentiating between MTB strains has made it possible to differentiate between the mechanisms giving rise to exogenous relapse and reinfection cases (Guerra-Assunção et al., 2015; Jagielski et al., 2016). For reinfection cases, reemergence of rifampicin-resistant isolates harboring double gene mutations, of codon 531 of rpoB and codon 306 of embB, were observed. Because TB relapse is usually associated with drug resistance (Cox et al., 2006), it is reasonable to predict that the emergence of drug-resistant TB will bias future recurrent TB cases away from reinfection rates toward greater relapse rates, as suggested by preliminary data from China regarding this issue (Shen et al., 2006, 2017; Yang et al., 2017). Therefore, by differentiating between mechanisms underlying the two distinct types TB recurrence, relapse versus reinfection, ultimately more effective TB control strategies could be implemented to achieve better TB control (Guerra-Assunção et al., 2015). This work was supported by the Natural Science Foundation of China (81672065) and Tongzhou District Science and Technology Committee (Grant No. doi: 10.1371/journal.pone.0211972. In order to investigate changes in drug susceptibility patterns between first and second TB episodes, we subcultured the isolates and used the alamarBlue assay to the minimal inhibitory concentrations (MICs) for MTB isolates from study patients (Zhang et al., 2014a).
Unfortunately, the epidemic of drug-resistant TB is threatening to destabilize TB control there (Zhao et al., 2012). After 7 days of incubation at 37°C, 70 μL of alamarBlue solution was added to each well for results interpretation. Relapses and exogenous reinfections shared an augmented risk of multidrug resistance development, frequently requiring the use of second-line anti-TB … doi: 10.1093/cid/civ255, Ysern, P., Clerch, B., Castańo, M., Gibert, I., Barbé, J., and Llagostera, M. (1990). Emerg. N Engl J Med. Recurrence of tuberculosis (TB) can be the consequence of relapse or exogenous reinfection.

Geneva: World Health Organization. TABLE 1. Martín, A., Herranz, M., Navarro, Y., Lasarte, S., Ruiz Serrano, M. J., Bouza, E., et al.

Odds ratios (OR) and 95% confidence interval (95%CI) were calculated in the univariate analyses. doi: 10.1016/j.tube.2017.01.007, Supply, P., Allix, C., Lesjean, S., Cardoso-Oelemann, M., Rüsch-Gerdes, S., Willery, E., et al. 2020;2(1):1-5. doi: 10.33696/immunology.2.011.


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