Rapid diagnosis of cryptococcosis using an antigen detection immunochromatographic test.

J Infect

Assistance Publique-Hôpitaux de Paris, Hôpital St Antoine, Service de Parasitologie-Mycologie, F-75012, Paris, France; Inserm, U1135, CIMI-Paris, 91 Bd de l'hôpital, F-75013, Paris, France; CNRS, ERL 8255, CIMI-Paris, 91 Bd de l'hôpital, F-75013, Paris, France; Sorbonne Universités, UPMC Univ Paris 06, CR7, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), 91 Bd de l'hôpital, F-75013, Paris, France. Electronic address:

Published: May 2015

Objectives: Current methods for cryptococcal antigen detection have some limitations. This study aimed at evaluating a lateral flow assay (LFA) for the diagnosis of cryptococcosis in a French University medical center.

Methods: A retrospective study was performed on samples collected from patients with a definitive diagnosis of cryptococcosis (group I 66 samples; 28 patients) or with non-Cryptococcus invasive fungal infection (group II 18 samples; 17 patients). In addition, 274 samples from 205 consecutive patients, either suspected of cryptococcal infection or routinely screened during their follow-up, were prospectively tested (group III). Cryptococcal antigen was assayed using LFA and an EIA. A latex-based test was used for confirmation.

Results: Sensitivity calculated on group I and specificity on group II, were respectively at 100% and 90.0%. Two false positives were related to Trichosporon fungemia. Per-sample analysis on group III revealed sensitivity, specificity, positive and negative predictive values all at 100% for CSF, and at 100%, 98.9%, 75% and 100%, respectively for serum samples. LFA enabled the diagnosis of two cases of asymptomatic cryptococcosis.

Conclusion: The excellent diagnostic value and practicality (visual reading results in 15 min) of LFA make it fully appropriate for the diagnosis of cryptococcosis in this particular setting.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jinf.2014.12.017DOI Listing

Publication Analysis

Top Keywords

diagnosis cryptococcosis
16
antigen detection
8
cryptococcal antigen
8
group samples
8
samples patients
8
group iii
8
group
6
samples
5
rapid diagnosis
4
cryptococcosis
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!