The ducks were inoculated with inactive vaccine made from isolated strains, and the protectiverate could reach 98.3%.
用分离菌株制成的灭活菌苗免疫当地小鸭，免疫保护率可达98.3%。
2
Chinese herbal compound prescription had better protective effect on preventing colibacillosis in broilers with the protectiverate of 93.3%, which was the same with that of amikacin.
中草药复方制剂对预防肉仔鸡大肠杆菌病有较好的保护作用，保护率为93.3%，与丁胺卡那霉素相同。
3
The skin's protective reaction of constricting surface blood vessels is slower with age, and the cold-induced rise in metabolic rate is also weakened in older people, but the mechanism is unknown.