Table 1. Number of samples collected from 2019 to 2021 and number of virus isolates.
| Broiler breeder farm (Prefecture name) | Year | Age (weeks) | Samples | FAdV | FAdV Serotype | ARV | ARV Genotype |
|---|---|---|---|---|---|---|---|
| A (Gifu) | 2019 | 8 | 5 a) | 5 b) | 5 c) | 0 b) | |
| 19 | 5 | 3 | 5 | 0 | |||
| 38 | 5 | 0 | 0 | ||||
| 64 | 5 | 0 | 0 | ||||
| B (Gifu) | 2020 | 8 | 3 | 0 | 3 | V d) | |
| 3 | 0 | 3 | II, V | ||||
| 20 | 3 | 0 | 0 | ||||
| 3 | 0 | 0 | |||||
| 61 | 3 | 0 | 0 | ||||
| 3 | 0 | 0 | |||||
| 2021 | 13 | 3 | 1 | 5 | 0 | ||
| 3 | 1 | 5 | 0 | ||||
| C (Nagano) | 2020 | 30 | 3 | 0 | 0 | ||
| 3 | 0 | 0 | |||||
| 39 | 3 | 0 | 1 | II, V | |||
| 3 | 0 | 0 | |||||
| 61 | 3 | 0 | 0 | ||||
| 3 | 0 | 0 | |||||
| 2021 | 35 | 3 | 0 | 0 | |||
| 56 | 3 | 0 | 0 | ||||
| 3 | 0 | 0 | |||||
| 45 | 1 | 0 | 0 | ||||
| 60 | 1 | 0 | 0 | ||||
| 64 | 1 | 0 | 0 | ||||
| Total | 74 | 10 | 7 | ||||
| Layer breeder farm (Prefecture name) | Year | Age (weeks) | Samples | FAdV | FAdV Serotype | ARV | ARV Genotype |
| D (Niigata) | 2019 | 8 | 2 | 2 | 5 | 0 | |
| 2 | 2 | 5 | 0 | ||||
| 2020 | 30 | 2 | 0 | 1 | IV | ||
| 2 | 0 | 2 | IV | ||||
| 50 | 2 | 2 | 8b | 0 | |||
| 2 | 2 | 8b | 0 | ||||
| E (Niigata) | 2019 | 10 | 2 | 2 | 5 | 0 | |
| 2 | 2 | 5 | 0 | ||||
| 2020 | 40 | 2 | 0 | 2 | II | ||
| 2 | 0 | 2 | II | ||||
| F (Iwate) | 2019 | 5 | 1 | 1 | 5 | 0 | |
| G (Gifu) | 2021 | 25 | 3 | 3 | 1 | 0 | |
| 3 | 0 | 0 | |||||
| 56 | 3 | 0 | 0 | ||||
| Total | 30 | 16 | 7 | ||||
FAdV: fowl adenovirus; ARV: avian reovirus. a) The figures indicate the number of samples collected annually from each breeder farm, b) number of positive samples, c) FAdV serotype, d) ARV genotype.