|
1
|
Longoni SS, Pomari E, Antonelli A, Formenti F, Silva R, Tais S, Scarso S, Rossolini GM, Angheben A, Perandin F. Performance Evaluation of a Commercial Real-Time PCR Assay and of an In-House Real-Time PCR for Trypanosoma cruzi DNA Detection in a Tropical Medicine Reference Center, Northern Italy. Microorganisms 2020; 8:E1692. [PMID: 33143253 PMCID: PMC7692395 DOI: 10.3390/microorganisms8111692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/23/2020] [Accepted: 10/28/2020] [Indexed: 02/01/2023] Open
Abstract
Chagas disease, a neglected protozoal disease endemic in Latin America, is also currently considered an emerging threat in nonendemic areas because of population movements. The detection of Trypanosoma cruzi DNA is increasingly being considered as important evidence to support Chagas disease diagnoses. However, further performance evaluation of molecular assays is useful for a standardization of strategy considering the whole process in routine diagnosis, especially for the different settings such as endemic and nonendemic countries. Seventy-five samples were collected from subjects screened for Chagas disease in Italy. The DNA was isolated from blood using automated extraction. We evaluated the performance of the commercial RealCycler® CHAG kit (pmPCR) based on satellite DNA (SatDNA) and of an in-house real-time PCR (ihPCR) targeting Sat and kinetoplast (k) DNAs, using the concordance of two serology assays as a reference standard. The sensitivity of kDNA and SatDNA tests by ihPCR and SatDNA by pmPCR were 14.29% (95% confidence interval (CI) 6.38 to 26.22), 7.14% (95% CI 1.98 to 17.29), and 7.14% (95% CI 1.98 to 17.29), respectively. Specificity was 100% for all PCR assays and targets. Overall, our results suggest that the preferred approach for clinical laboratories is to combine the kDNA and SatDNA as targets in order to minimize false-negative results increasing sensitivity.
Collapse
Affiliation(s)
- Silvia Stefania Longoni
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Elena Pomari
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Alberto Antonelli
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (A.A.); (G.M.R.)
- Microbiology and Virology Unit, Careggi University Hospital, 50134 Florence, Italy
| | - Fabio Formenti
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Ronaldo Silva
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Stefano Tais
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Salvatore Scarso
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Gian Maria Rossolini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy; (A.A.); (G.M.R.)
- Microbiology and Virology Unit, Careggi University Hospital, 50134 Florence, Italy
| | - Andrea Angheben
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| | - Francesca Perandin
- Department of Infectious-Tropical Diseases and Microbiology, IRCCS SacroCuore Don Calabria Hospital, Negrar di Valpolicella, 37024 Verona, Italy; (E.P.); (F.F.); (R.S.); (S.T.); (S.S.); (A.A.); (F.P.)
| |
Collapse
|
|
2
|
What is the role of real time PCR in the follow up of patients with chronic Chagas’ disease? Enferm Infecc Microbiol Clin 2020; 38:353-355. [DOI: 10.1016/j.eimc.2020.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 11/18/2022]
|