Characterization of rifampin-resistant staphylococcus aureus nasal carriage in patients receiving rifampin-containing regimens for tuberculosis
Journal
Infection and Drug Resistance
Journal Volume
11
Pages
1175
Date Issued
2018-01-01
Author(s)
Liao, Chun Hsing
Yang, Chia Jui
Hsu, Hsin Sui
Abstract
© 2018 Huang et al. Objectives: This study investigated molecular characteristics of rifampin (RIF)-resistant (RIF-R) Staphylococcus aureus isolates recovered from patients receiving RIF-containing regimens for tuberculosis (TB). Patients and methods: Patients with TB who received RIF-containing regimens from November 2009 to May 2011 at a medical center were enrolled. Nasal swabs for S. aureus culture were obtained at the time of enrollment, and then every two months until two months after RIF treatment had been completed. Genetic relatedness of the isolates was determined using pulsed-field gel electrophoresis, multilocus sequence typing, and gene typing of spa and SCCmec. The presence of RIF resistance-associated mutations in rpoB, and fusidic acid resistance genes fusB and fusC in the S. aureus isolates were analyzed. Results: Among the 200 patients enrolled in this study, 152 completed follow-ups during treatment, and 114 completed two months of follow-up after discontinuing use of RIF. At enrollment, ten patients (5%) had nasal colonization with S. aureus, namely eight with methicillin-susceptible S. aureus (MSSA), and two with methicillin-resistant S. aureus (MRSA, ST59-SCCmecIV-RIF-susceptible). All these patients were decolonized after RIF usage. Two patients with MSSA colonization at enrollment showed recolonization with genetically unrelated MSSA strains two months after completion of RIF treatment. There were five ST45-SCCmecV T -RIF-R strains from two patients isolated during RIF exposure. Sequencing of rpoB in the RIF-R S. aureus isolates revealed different mutation sites between the MSSA and MRSA isolates. Conclusion: RIF-R S. aureus strains are more likely to result in persistent nasal carriage in TB patients receiving RIF treatment. Monitoring of emergence and possible dissemination of the MRSA ST45 strains among TB patients treated with RIF in Taiwan is warranted.
Subjects
Methicillin-resistant S. aureus | Nasal carriage | Rifampin resistance | Staphylococcus aureus | Taiwan | Tuberculosis
Methicillin-resistant S. aureus; Nasal carriage; Rifampin resistance; Staphylococcus aureus; Taiwan; Tuberculosis
SDGs
Other Subjects
fusidic acid; rifampicin; RNA polymerase beta subunit; adult; antibiotic resistance; Article; bacterial colonization; bacterial gene; bacterial mutation; bacterial strain; bacterium culture; bacterium isolate; cohort analysis; controlled study; drug exposure; drug use; female; follow up; fusB gene; fusC gene; genetic association; genotype; human; major clinical study; male; methicillin resistant Staphylococcus aureus; methicillin susceptible Staphylococcus aureus; middle aged; molecular typing; multilocus sequence typing; nonhuman; nose infection; nose smear; observational study; prospective study; pulsed field gel electrophoresis; rpoB gene; Staphylococcus aureus; treatment duration; tuberculosis
Publisher
DOVE MEDICAL PRESS LTD
Type
journal article