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Table 1 Virus inoculation and subsequent recovery by PCR

From: A novel sampling method to detect airborne influenza and other respiratory viruses in mechanically ventilated patients: a feasibility study

Virus Treatment Conditions 1 week 2 weeks 4 weeks
Influenza virus Negative controlsa   No No No
Virus added 20 °C Detected No No
Virus added − 20 °C Detected Detected Detected
Rhinovirus Negative controlsa   No No No
Virus added 20 °C Detected No No
Virus added − 20 °C Detected Detected Detected
  1. 10 uL of viral stock was inoculated onto each ventilator filter. These filters were then stored at either room temperature (20 °C) or low temperature (− 20 °C) for 1, 2 or 4 weeks. Triplicates were stored for each condition
  2. aNegative controls did not have any virus particles added to the filter