- It could be used for the surveillance of herd immunity and for the examination of immunization quality . it could aslo be used for diagnosis and epidemiologic investigation of streptoccus suis
该方法操作简便快捷， 2 . 5小时即可得出结果；结果客观，易于判定；重复性好；各种试剂材料均可做到标准化。
Herd immunity (or community immunity) describes a form of immunity that occurs when the vaccination of a significant portion of a population (or herd) provides a measure of protection for individuals who have not developed immunity. Herd immunity theory proposes that, in contagious diseases that are transmitted from individual to individual, chains of infection are likely to be disrupted when large numbers of a population are immune or less susceptible to the disease.