Abstract:
BACKGROUND:Pneumococcal parapneumonic effusion seems to be increasing in children in the postvaccine era and is frequently associated with negative culture. Due to the low yield of culture, culture-independent tools are evaluated. METHODS:Culture-negative pleural fluid specimens from 38 children with parapneumonic effusion were examined for pneumococcal lytA by quantitative polymerase chain reaction (qPCR) and soluble antigen (C-polysaccharide) using an immunochromatographic test (BinaxNow Streptococcus pneumoniae). RESULTS:In 81% (30/37) and 63% (24/38) of the specimens, a positive result was obtained by qPCR and antigen detection, respectively. Most mismatches were observed in specimens with low quantities of pneumococcal DNA and a negative antigen test. CONCLUSIONS:Our results suggest an imperfect relationship between the 2 described methods. The immunochromatographic assay is a simple diagnostic tool, which can be used when resources are limited, and even after antibiotic use, but negative results may require confirmation through a more sensitive test, such as qPCR.
journal_name
Diagn Microbiol Infect Disjournal_title
Diagnostic microbiology and infectious diseaseauthors
Perez VP,Caierão J,Fischer GB,Dias CA,d'Azevedo PAdoi
10.1016/j.diagmicrobio.2016.07.022subject
Has Abstractpub_date
2016-10-01 00:00:00pages
200-4issue
2eissn
0732-8893issn
1879-0070pii
S0732-8893(16)30230-9journal_volume
86pub_type
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