Affordable Access

deepdyve-link
Publisher Website

[Laboratory diagnosis of Treponema pallidum infection in patients with early syphilis and neurosyphilis through a PCR-based test].

Authors
  • García, Patricia
  • Grassi, Bruno
  • Fich, Félix
  • Salvo, Aurelio
  • Araya, Luis
  • Abarzúa, Fernando
  • Soto, Julia
  • Poggi, Helena
  • Lagos, Marcela
  • Vásquez, Patricia
  • León, Eugenia P
  • Pérez, Carlos
  • Wozniak, Aniela
Type
Published Article
Journal
Revista chilena de infectología : órgano oficial de la Sociedad Chilena de Infectología
Publication Date
Aug 01, 2011
Volume
28
Issue
4
Pages
310–315
Identifiers
DOI: /S0716-10182011000500002
PMID: 22052394
Source
Medline
License
Unknown

Abstract

Syphilis is a sexually transmitted disease caused by Treponema pallidum. The diagnosis is based mainly in clinical presentation and non-specific assays. PCR-based diagnosis has been suggested as an attractive alternative method. The aim of this study was the validation of a PCR-based test for the diagnosis of early syphilis (ES) and neurosyphilis (NS). Clinical samples of mucocutaneous lesions and cerebrospinal fluid (CSF) specimens from patients previously diagnosed for ES and NS respectively using an enlarged gold standard, were tested by PCR. The reaction was done using primers targeting the tpN47 gene. Twenty out of 21 mucocutaneous samples from patients diagnosed with ES were positive by PCR, with a clinical sensitivity of 95%. Four out of 8 CSF samples from patients previously diagnosed with NS were positive by PCR, with a clinical sensitivity of 50%. The clinical specificity for both ES and NS was 100%. The PCR sensitivity and specificity for mucocutaneous samples allowed us to implement this assay in our laboratory for routine diagnosis. Although the sensitivity of the PCR in CSF was low, it may be useful to support clinical diagnosis.

Report this publication

Statistics

Seen <100 times