Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR
Context: COVID-19 caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is an emerging pandemic that is rapidly spreading with more than 114 million confirmed cases and 2.5 million deaths by far. Nasopharyngeal swab (NPS) in VTM has been used as the gold standard respiratory specime...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2022-01-01
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| Series: | Indian Journal of Pathology and Microbiology |
| Subjects: | |
| Online Access: | http://www.ijpmonline.org/article.asp?issn=0377-4929;year=2022;volume=65;issue=4;spage=907;epage=910;aulast=Gupta |
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| author | Megha Gupta Parul Sinha Sandeep Gupta Dinesh K Jain Saroj Hooja Nitya Vyas |
| author_facet | Megha Gupta Parul Sinha Sandeep Gupta Dinesh K Jain Saroj Hooja Nitya Vyas |
| author_sort | Megha Gupta |
| collection | DOAJ |
| description | Context: COVID-19 caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is an emerging pandemic that is rapidly spreading with more than 114 million confirmed cases and 2.5 million deaths by far. Nasopharyngeal swab (NPS) in VTM has been used as the gold standard respiratory specimen for SARS-CoV-2 reverse-transcriptase real-time PCR (rRT-PCR) tests. But now the virus can also be detected in other clinical specimens like bronchoalveolar lavage, sputum, saliva, throat swab, blood, and stool specimens. Aims: The aim of this study was to determine the diagnostic potential of saliva as a sample in comparison to NPS for detection of SARS-CoV-2 by rRT-PCR. Settings and Design: A cross-sectional study was conducted among 256 paired samples (NPS and Saliva) received in the Department of Microbiology, SMS Medical College, Jaipur over a period of 2 months Methods and Material: NPS from individuals were collected in a sterile tube containing Viral Transport Medium™. Before swab collection, whole saliva was collected by spitting from the suspected patient into a sterile container. Both were stored at room temperature and transferred to the diagnostic laboratory within four hours of collection where extraction was done using Perkin Elmer chemagic extractor and rRT- PCR was performed using NIV, Pune mastermix. Results: Sensitivity, specificity, PPV, and NPV of RT-PCR for the diagnosis of COVID-19 in saliva were 84.26%, 100%, 100%, and 54.05%, respectively. The accuracy of detection of COVID-19 by saliva samples compared to the routinely used NPS samples (considered as the standard reference) for RT PCR was 86.72%. Conclusions: Our results show that saliva as a reliable sample type for SARS-CoV-2 detection. |
| first_indexed | 2024-04-11T01:24:22Z |
| format | Article |
| id | doaj.art-ec81902384424a83875b9a70497e26c3 |
| institution | Directory Open Access Journal |
| issn | 0377-4929 |
| language | English |
| last_indexed | 2024-04-11T01:24:22Z |
| publishDate | 2022-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Pathology and Microbiology |
| spelling | doaj.art-ec81902384424a83875b9a70497e26c32023-01-03T10:48:41ZengWolters Kluwer Medknow PublicationsIndian Journal of Pathology and Microbiology0377-49292022-01-0165490791010.4103/ijpm.ijpm_292_21Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCRMegha GuptaParul SinhaSandeep GuptaDinesh K JainSaroj HoojaNitya VyasContext: COVID-19 caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is an emerging pandemic that is rapidly spreading with more than 114 million confirmed cases and 2.5 million deaths by far. Nasopharyngeal swab (NPS) in VTM has been used as the gold standard respiratory specimen for SARS-CoV-2 reverse-transcriptase real-time PCR (rRT-PCR) tests. But now the virus can also be detected in other clinical specimens like bronchoalveolar lavage, sputum, saliva, throat swab, blood, and stool specimens. Aims: The aim of this study was to determine the diagnostic potential of saliva as a sample in comparison to NPS for detection of SARS-CoV-2 by rRT-PCR. Settings and Design: A cross-sectional study was conducted among 256 paired samples (NPS and Saliva) received in the Department of Microbiology, SMS Medical College, Jaipur over a period of 2 months Methods and Material: NPS from individuals were collected in a sterile tube containing Viral Transport Medium™. Before swab collection, whole saliva was collected by spitting from the suspected patient into a sterile container. Both were stored at room temperature and transferred to the diagnostic laboratory within four hours of collection where extraction was done using Perkin Elmer chemagic extractor and rRT- PCR was performed using NIV, Pune mastermix. Results: Sensitivity, specificity, PPV, and NPV of RT-PCR for the diagnosis of COVID-19 in saliva were 84.26%, 100%, 100%, and 54.05%, respectively. The accuracy of detection of COVID-19 by saliva samples compared to the routinely used NPS samples (considered as the standard reference) for RT PCR was 86.72%. Conclusions: Our results show that saliva as a reliable sample type for SARS-CoV-2 detection.http://www.ijpmonline.org/article.asp?issn=0377-4929;year=2022;volume=65;issue=4;spage=907;epage=910;aulast=Guptanasopharyngeal swabrrt-pcrsalivasars-cov-2 |
| spellingShingle | Megha Gupta Parul Sinha Sandeep Gupta Dinesh K Jain Saroj Hooja Nitya Vyas Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR Indian Journal of Pathology and Microbiology nasopharyngeal swab rrt-pcr saliva sars-cov-2 |
| title | Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR |
| title_full | Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR |
| title_fullStr | Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR |
| title_full_unstemmed | Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR |
| title_short | Diagnostic accuracy of saliva as a specimen for detection of SARS-CoV-2 by RT-PCR |
| title_sort | diagnostic accuracy of saliva as a specimen for detection of sars cov 2 by rt pcr |
| topic | nasopharyngeal swab rrt-pcr saliva sars-cov-2 |
| url | http://www.ijpmonline.org/article.asp?issn=0377-4929;year=2022;volume=65;issue=4;spage=907;epage=910;aulast=Gupta |
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