Table 3.
Tissue tropisms of K2p170 compared with the parent strain (K2parent) and respiratory strain (K571/99) in 1-day-old SPF chickens.
| Virusesa (genogroup) | Virus isolationb |
||||
|---|---|---|---|---|---|
| Trachea | Lung | Cecal tonsil | Kidney | Bursa | |
| K2parent (Korean group II) | 10/10 | 9/10 | 8/10 | 8/10 | 10/10 |
| K2p170 (Korean group II) | 8/10 | 3/10 | 1/10 | 0/10 | 0/10 |
| K571/99 (Korean group I) | 6/10 | 0/10 | 1/10 | 0/10 | 1/10 |
| None | 0/10 | 0/10 | 0/10 | 0/10 | 0/10 |
a
One-day-old SPF chicks were inoculated with IBV (104.5 EID50/bird) via the intraocular route.
b
Seven days after challenge chicks were sacrificed and tissues were collected for re-isolation of the challenge virus. Data are the number of chicks from which the virus was isolated/number of chicks inoculated with the virus.