猪瘟耐热保护剂活疫苗（兔源）免疫效果监测

摘要

In order to know the compulsory immunization effects of swine fever vaccine with heat-resistant protectants in natural conditions,2140 piglet serum samples were collected from 50 intensive pig farms and 380 free-ranging pig holders after concentrated immunizations in spring and autumn for immune-surveillance. Results showed that the positive rate of classical swine fever antibody was 67.3%after spring immunization,with 79.8%in intensive farms and 56.3%in free-ranging holders;the positive rate of swine fever antibody was 69.1%after autumn immunization,with 70.1%by vaccine B(81.6%in intensive farms and 61.3%in free-ranging holders),and 65.8%by vaccine C(78.5%in inten-sive farms and 51.2%in free-ranging holders). The antibody dispersion of spring immunization was 37.5%in average, with 25.5%in intensive farms and 48.2%in free-ranging holders;the antibody dispersion of autumn immunization with vaccine B was 31.4%,with 28.4%in intensive farms and 35.6%in free-ranging holders;and the antibody dispersion of autumn immunization with vaccine C was 41.5%,with 42.1%in intensive farms and 41.2%in free-ranging holders.%为了解掌握猪瘟耐热保护剂活疫苗在自然状态下的强制免疫效果，在春秋二季集中免疫之后，跟踪监测了50个规模猪场和380个散养户仔猪血样2140份。监测结果发现：春防猪瘟样品抗体监测阳性率为67.3%，其中规模场79.8%，散户56.3%；秋防猪瘟样品抗体监测阳性率为69.1%，其中，免疫B苗的抗体阳性率为70.1%（规模场81.6%，散户61.3%），C苗的抗体阳性率为65.8%（规模场78.5%，散户51.2%）。春防抗体离散度平均37.5%，其中规模场25.5%，散户48.2%；秋防B苗接种的抗体离散度31.4%，其中规模场28.4%，散户35.6%；秋防C苗接种的抗体离散度41.5%，其中规模场42.1%，散户41.2%。