Table 3.
COVID-19 disease phase and sample site recommendation.
| Sample Sites | Asymptomatic Phase | Onset of the Symptomatic Phase | Symptomatic Phase | Convalescence Phase |
|---|---|---|---|---|
| Naso-pharyngeal swabs | Unclear | Highly recommended Detection rate: 80% |
Recommended Detection rate: 59% |
Recommended Detection rate: 36% |
| Oro-pharyngeal swabs | Unclear | Highly recommended Detection rate: 75% |
Not recommended Detection rate: 35% |
Not recommended Detection rate: 12% |
| Saliva collection | Unclear | Highly recommended Detection rate: 82.2% |
Unclear | Unclear |
| Sputum collection | Unclear | Highly recommended Detection rate: 98% |
Highly recommended Detection rate: 69% |
Not recommended Detection rate: 46% |
| Bronco-alveolar lavage | Unclear/not recommend | Unclear/not recommended | Highly recommended in intubated patients Detection rate: 94% |
Not recommend |
| Fecal/anal swabs | Not recommend | Not recommended Detection rate: 48% |
Not recommended | Recommended Detection rate: 73% |