A serous pericarditis, in which there is some inflammation but little or no exudation, is most often due to autoimmune diseases or viral infection.
自身免疫性疾病或病毒感染时易发生浆液性心包炎，有一定程度的炎症反应，但很少有渗出。
2
The disease characterized by high fever, cough, serous and fibrinous inflammation of the lungs and pleura with a high mortality rate, is harm to the sheep industry.