Evaluation of a real-time polymerase chain reaction assay for the laboratory diagnosis of giardiasis

被引：35

作者：

Calderaro, Adriana ^{[1
]}

Gorrini, Chiara ^{[1
]}

Montecchini, Sara ^{[1
]}

Peruzzi, Simona ^{[1
]}

Piccolo, Giovanna ^{[1
]}

Rossi, Sabina ^{[1
]}

Gargiulo, Franco ^{[2
]}

Manca, Nino ^{[2
]}

Dettori, Giuseppe ^{[1
]}

Chezzi, Carlo ^{[1
]}

机构：

[1] Univ Hosp Parma, Microbiol Sect, Dept Pathol & Lab Med, I-43100 Parma, Italy

[2] Univ Brescia, Spedali Civili, Inst Microbiol, Dept Expt & Appl Med, I-25123 Brescia, Italy

来源：

DIAGNOSTIC MICROBIOLOGY AND INFECTIOUS DISEASE | 2010年 / 66卷 / 03期

关键词：

Giardia intestinalis; Real-time PCR; Genotyping; ENTAMOEBA-HISTOLYTICA; CRYPTOSPORIDIUM-PARVUM; FECAL SAMPLES; DUODENALIS; LAMBLIA; PCR; GENOTYPE; EPIDEMIOLOGY; IMMUNOASSAY; SPECIMENS;

D O I：

10.1016/j.diagmicrobio.2009.10.004

中图分类号：

R51 [传染病];

学科分类号：

100401 ;

摘要：

A real-time polymerase chain reaction (PCR) assay was evaluated in comparison with the combination of conventional methods (microscopic examination and antigen detection assay) during the period 2006 to 2008 on 771 fecal samples belonging to 386 patients to assess its usefulness for an accurate laboratory diagnosis of giardiasis. The real-time PCR assay detected Giardia infestinalis DNA in 195 samples (106 patients), including 26 samples (21 patients) negative by the conventional assays. Among the 21 patients, in 8 cases, giardiasis was previously diagnosed also by conventional methods in additional samples of the same patients, whereas in 13, it would have been undiagnosed if real-time PCR assay was not used. The real-time PCR assay demonstrated a detection limit of 2 cysts per reaction and 100% specificity and sensitivity compared to conventional methods. A genotype analysis targeting the beta-giardin gene allowed to identify 53 samples (23 patients) containing genotype A and 59 samples (45 patients) containing genotype B. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：261 / 267

页数：7

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