Publication
Title
lytA-based identification methods can misidentify Streptococcus pneumoniae
Author
Abstract
During surveillance studies we detected, among over 1500 presumptive pneumococci, 11 isolates displaying conflicting or novel results when characterized by widely accepted phenotypic (optochin susceptibility and bile solubility) and genotypic (lytA-BsaAI-RFLP and MLST) identification methods. We aimed to determine the genetic basis for the unexpected results given by lytA-BsaAl-RFLP and investigate the accuracy of the WHO recommended lytA real-time PCR assay to classify these 11 isolates. Three novel lytA-BsaAI-RFLP signatures were found (one in pneumococcus and two in S. mitts). In addition, one pneumococcus displayed the atypical lytA-BsaAl-RFLP signature characteristic of non-pneumococci and two S. pseudopneumoniae displayed the typical lytA-BsaAl-RFLP pattern characteristic of pneumococci. lytA real-time PCR misidentified these three isolates. In conclusion, identification of pneumococci by lytA real-time PCR, and other lytA-based methodologies, may lead to false results. This is of particular relevance in the increasingly frequent colonization studies relying solely on culture independent methods. (C) 2016 Elsevier Inc. All rights reserved.
Language
English
Source (journal)
Diagnostic microbiology and infectious disease. - Amsterdam
Publication
Amsterdam : 2016
ISSN
0732-8893
Volume/pages
85:2(2016), p. 141-148
ISI
000376822600004
Full text (Publishers DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 01.06.2017
Full text (publishers version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 05.07.2016
Last edited 08.05.2017
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