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Open AccessJournal ArticleDOI

Quinupristin-Dalfopristin Nonsusceptibility in Pneumococci from Sickle Cell Disease Patients

TLDR
Nonsusceptibilty to quinupristin-dalfopristin (Q-D) was absent from 105 non-SCD- associated pneumococcal isolates but was present in 33/148 SCD-associated isolates, and one-third of the isolates harbored a known resistance mechanism.
Abstract
Sickle cell disease (SCD) is a risk factor for fatal pneumococcal infection. Nonsusceptibilty to quinupristin-dalfopristin (Q-D) was absent from 105 non-SCD-associated pneumococcal isolates but was present in 33/148 (22%) SCD-associated isolates. One-third of the isolates harbored a known resistance mechanism. Q-D is not optimal for use for the treatment of pneumococcal infection in SCD patients.

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References
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Performance standards for antimicrobial susceptibility testing

TL;DR: The supplemental information presented in this document is intended for use with the antimicrobial susceptibility testing procedures published in the following Clinical and Laboratory Standards Institute (CLSI)–approved standards.
Journal ArticleDOI

Identification of a Candidate Streptococcus pneumoniae Core Genome and Regions of Diversity Correlated with Invasive Pneumococcal Disease

TL;DR: RDs are unequally distributed between invasive and noninvasive isolates, RD8a and RD10 are correlated with the propensity of an isolate to cause IPD, and PsrP is required for full virulence in mice.
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