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Evaluation of a real-time polymerase chain reaction assay for the laboratory diagnosis of giardiasis
- Source :
- Diagnostic Microbiology and Infectious Disease. 66:261-267
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- 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 intestinalis 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.
- Subjects :
- Adult
Giardiasis
Microbiology (medical)
Protozoan Proteins
Biology
Polymerase Chain Reaction
Sensitivity and Specificity
Genetic analysis
law.invention
Feces
Antigen
law
Genotype
Humans
Typing
Child
Genotyping
Polymerase chain reaction
General Medicine
Molecular biology
Bacterial Typing Techniques
Cytoskeletal Proteins
Infectious Diseases
Real-time polymerase chain reaction
Giardia lamblia
Polymorphism, Restriction Fragment Length
Subjects
Details
- ISSN :
- 07328893
- Volume :
- 66
- Database :
- OpenAIRE
- Journal :
- Diagnostic Microbiology and Infectious Disease
- Accession number :
- edsair.doi.dedup.....503a48ee22a8a95ec3d99eec800b2c24