Table 2

Main findings of recent studies on SARS-CoV-2 detection in saliva samples by using RT-PCR.

AuthorsMain finding(s) related to salivary specimens
To et al 28 91.7% of nasopharyngeal swab-diagnosed cases.
Live virus was detected in saliva using viral culture.
To et al 29 87% of nasopharyngeal swab-diagnosed cases.
Salivary viral load was highest during the first week of symptom.
Azzi et al 32 Detected in all nasopharyngeal swab-diagnosed cases.
Kojima et al 24 Self-collected saliva and nasal swab had similar sensitivity as compared with the clinician-collected nasopharyngeal swabs
Wyllie et al 25 Saliva is more sensitive and consistent than nasopharyngeal swabs
Williams et al 31 84.6% of nasopharyngeal swab-diagnosed cases.
Viral load was higher in the nasopharyngeal swab.
Pasomub et al 33 84.2% of nasopharyngeal swab-diagnosed cases.
Saliva might be an alternative specimen for COVID-19 diagnosis.
  • SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.