TABLE 1.
CPE observations at each passage
| Culture (passage) | Species | Name | Observations of CPE | ||||
|---|---|---|---|---|---|---|---|
| P1 | P2 | P3 | P4 | P5 | |||
| Vero/TMPRSS2 |
Respirovirus laryngotracheitidis (human parainfluenza virus 1) |
PIV1_Fukushima_O77_2018 | − | − | + | + | +a |
| PIV1_Fukushima_H171_2018 | − | − | − | + | +a | ||
| PIV1_Fukushima_O425_2018 | − | − | − | + | + | ||
| PIV1_Fukushima_O503_2019 | − | + | + | + | + | ||
|
Orthorubulavirus laryngotracheitidis (human parainfluenza virus 2) |
PIV2_Fukushima_O13_2018 | + | + | + | + | + | |
| PIV2_Fukushima_O33_2018 | + | + | + | + | + | ||
| PIV2_Fukushima_O836_2019 | + | + | + | + | + | ||
| PIV2_Fukushima_O861_2019 | + | + | + | + | + | ||
|
Respirovirus pneumoniae (human parainfluenza virus 3) |
PIV3_Fukushima_O330_2018 | − | + | + | + | +a | |
| PIV3_Fukushima_O644_2019 | − | + | + | + | + | ||
| PIV3_Fukushima_O726_2019 | + | + | + | + | + | ||
|
Orthorubulavirus hominis (human parainfluenza virus 4) |
PIV4a_Fukushima_H725_2019 | − | − | − | + | + | |
| PIV4b_Fukushima_O896_2019 | − | − | + | + | + | ||
| PIV4b_Fukushima_OR476_2022 | + | + | + | + | + | ||
| Vero |
Orthorubulavirus laryngotracheitidis (human parainfluenza virus 2) |
PIV2_Fukushima_O13_2018 | − | − | + | − | + |
| PIV2_Fukushima_O33_2018 | − | − | − | + | + | ||
| PIV2_Fukushima_O836_2019 | − | − | + | − | + | ||
| PIV2_Fukushima_O861_2019 | + | + | + | + | + | ||
a
No syncytia were observed at P5.