he Sus scrofa var. domesticus infects easily the human and the a type influenza virus in Tuoli. The appearance of disease Sus scrofa var. domesticus shows an energetic disappearance, a nud, a general symptom, a runny nose, and a throe of the exoergic etc. tussis, and the respiratory symptom such as breath Unagahac. The catarrhal inflammation of the respiratory mucosa cuticle, the hyperemia of the pharyngeal mucous membrane, the bronchia, and endotracheal mucus retention, the pulmonary collapse, interstitial pneumonia, and the pneumonectasia, etc. are taken as pathological findings. The isolation of the virus does the allantoic cavity inscribed kind in the amniotic cavity and does runny nose wipe, the trachea, and the pulmonary lesion part of the growth egg. It ..straightening method of treatment Hanai.. treats symptoms as they appear specific. The prognosis is benign, and in general, the prognosis is bad and it becomes a lethal target in the young pig when progressing to the pulmonitis though the mortality is 1% or less.
The main subtype of the a type influenza virus that becomes popular between Sus scrofa var. domesticus in Japan is two subtypes of H1N1 and H3N2, and the inactivated vaccine to these two subtypes is developed. The swine influenza virus strain of a different subtype is at the same time in the same cell and in the infection lingua situation, there is a possibility that a new influenza virus appears by the genetic reassortment (antigenic shift).
