[Objective] The paper was to formulate classical swine fever( CSF) immunization procedures in large-scale pig farms. [Method] Antibody maintenance time and dynamics of material antibody was detected by enzyme-linked i...[Objective] The paper was to formulate classical swine fever( CSF) immunization procedures in large-scale pig farms. [Method] Antibody maintenance time and dynamics of material antibody was detected by enzyme-linked immunosorbent assay( ELISA),and scientific primary immunization time of piglets was explored. [Result] The positive rate of sows reached the highest level of 93% at 4 weeks post immunization. Piglets were immunized at 9 weeks of age,the antibody level did not increase at 3 weeks post immunization,but increased rapidly after secondary immunization; the antibody level in late fattening period was high,and pigs could be protected completely. [Conclusion]General prevention of CSF is suitable for scale farming. It takes about 4 weeks to produce CSF antibody. Therefore,pig farms should conduct immunization timely at one month prior to susceptible stage according to their infection pressure.展开更多
目的:建立创伤性股骨头坏死(osteonecrosis of femoral head,ONFH)MRI分型,并初步探讨其与股骨头塌陷进展的相关性。方法:回顾性分析2000年1月至2019年12月于泉州市正骨医院关节中心就诊的73例(73髋)创伤性ONFH,男46例、女27例,年龄为(3...目的:建立创伤性股骨头坏死(osteonecrosis of femoral head,ONFH)MRI分型,并初步探讨其与股骨头塌陷进展的相关性。方法:回顾性分析2000年1月至2019年12月于泉州市正骨医院关节中心就诊的73例(73髋)创伤性ONFH,男46例、女27例,年龄为(34.9±8.3)岁(范围19~55岁)。记录患者的骨折分型、复位质量、日本厚生省骨坏死研究会(Japanese Investigation Commite,JIC)分型等临床和影像学资料。采用2019年修订版国际骨坏死与骨循环协会(Association Research Circulation Osseous,ARCO)分期诊断标准评估创伤性ONFH疾病进展程度,将其中的ⅢA期、ⅢB期分别定义为轻度塌陷和进行性塌陷。建立MRI修复带(bone repair band,BRB)分型,并对创伤性ONFH进行划分,并采用Kappa检验分析BRB分型的观察者内及观察者间的一致性,Kaplan-Meier生存曲线与二分类变量Cox回归分析BRB分型与股骨头进行性塌陷的相关性。结果:73例随访(54.8±34.9)个月(范围24~165个月)。根据BRB分型,73例中1型浅表病灶28例(38%)、2型不确定病灶16例(22%)、3型广泛病灶29例(40%)。BRB分型的观察者间一致性Kappa值为0.798,观察者内一致性Kappa值为0.896,一致性高。末次随访时进展至ARCOⅢA期者中BRB分型为1型3例、2型4例、3型14例;进展至ARCOⅢB期者中BRB分型1型1例、2型1例、3型12例。BRB分型是创伤性ONFH进行性塌陷的独立危险因素[HR=13.957,95%CI(4.551,21.193),P<0.001]。以出现进行性塌陷(ⅢB期)为终点事件,2型出现不良预后的风险与1型的差异无统计学意义[HR=1.766,95%CI(0.465,6.702),P=0.403],3型出现不良预后的风险显著高于1型[HR=15.126,95%CI(4.708,48.592),P<0.001]。结论:BRB分型与创伤性ONFH的疾病进展密切相关,是预测进行性塌陷发生的独立危险因素;BRB分型有助于早期诊断后预测塌陷进展与治疗方案决策。展开更多
文摘[Objective] The paper was to formulate classical swine fever( CSF) immunization procedures in large-scale pig farms. [Method] Antibody maintenance time and dynamics of material antibody was detected by enzyme-linked immunosorbent assay( ELISA),and scientific primary immunization time of piglets was explored. [Result] The positive rate of sows reached the highest level of 93% at 4 weeks post immunization. Piglets were immunized at 9 weeks of age,the antibody level did not increase at 3 weeks post immunization,but increased rapidly after secondary immunization; the antibody level in late fattening period was high,and pigs could be protected completely. [Conclusion]General prevention of CSF is suitable for scale farming. It takes about 4 weeks to produce CSF antibody. Therefore,pig farms should conduct immunization timely at one month prior to susceptible stage according to their infection pressure.
