標題: The cause of disease [打印本頁] 作者: monica 時間: 2007-5-4 00:40 標題: The cause of disease The Causes of DiseaseIt is likely that when considering the causes of disease you think first of infectious micro-organisms. You would be right to do so in that infectious disease plays a much bigger role in pig herds, particularly large intensive pig herds, than in animals kept individually such as dogs and cats. Nevertheless there are other non-infectious causes of disease which may also be damaging to the herd and to productivity and profitability. Causes of disease are considered here under nine main headines :
Infectious agents : Viruses ;Bacteria including; Chlamydia, Anaplasma and Mycoplasma ;Fungi ,Parasites
Non infectious agents : Trauma,Hereditary and congenital defects (developmental abnormalities),Nutritional deficiencies and excesses ,Toxic agents (poisons),Stress .
[ 本帖最后由 monica 于 2007-5-4 00:42 編輯 ]作者: 山中的漫游者 時間: 2007-5-4 00:48
today，stress maybe the first factor for pig's disease,such as high-fever disease.作者: hyy1012 時間: 2007-5-4 11:23
what are the causes of stress upon all animals? environment, nutrition, disease, animal welfare or human?