Pathomorphological changes on conchae of piglets experimentally infected with Bordetella bronchiseptica
1996
Vidic, B. (Veterinary Science Institute, Novi Sad (Yugoslavia)) | Knezevic, M. | Asanin, R.
Atrophic rhinitis was provoked in 2- or 3-day old piglets by intranasal application of a virulent strain of Bordetella bronchiseptica. B. bronchiseptica could be isolated from the lungs until day 60, from the trachea until day 75, from the conchae until day 120 and from the ethmoid sinus until day 165 on the infection. Clinical symptoms were evident on day 5 after infection and were noticeable until day 60. Macroscopic changes on conchae appeared as hyperemia, the presence of haemorrhagic content and different degrees of conchae atrophy with deformation of the nasal septum. Atrophic changes were evident on day 23 of infection and could be noticed until the end of the experiment. Changes on the lungs of the animal that died and sacrificed animals appeared as fibrous pneumonia. Pathohistological changes were found in all infected animals from day 12 of the infection until the end of the experiment. The type of changes depended on the infection stadium.
显示更多 [+] 显示较少 [-]