中药方剂对自然感染PCV2断奶仔猪生长性能和猪瘟疫苗免疫应答的影响

探讨中药对自然感染猪圆环病毒2型（PCV2）仔猪生长性能和猪瘟疫苗免疫应答的影响，结果显示：1%中药组、1.5%中药组、2.0%中药组的日增重分别比对照组提高30.40%（P〈0.05）、28.88%（P〈0.05）和31.06%（P〈0.05），饲料转化率分别比对照组提高2.02%、7.25%和10.26%，日采食量分别比对照组提高26.23%、14.75%和9.84%，猪瘟抗体阻断率分别比对照组提高9.57%、18.27%和30.93%（P〈0.05），猪瘟抗体阳性率均大于70%，1.5%中药组、2.0%中药组的猪瘟抗体变异系数均小于40%。表明自拟中药方剂可较好地控制PCV2，提高仔猪生长性能和增强猪瘟疫苗免疫应答，且以2%中药组效果最好。

Effect of TCM on Growth and Immune-response to Hog Cholera Vaccine of Weaned Piglets Carrying Naturally Acquired Porcine Circovirus Type 2

A traditional Chinese medicine （TCM） was formulated to study its effect on the growth and immune-response to the hog cholera vaccine of the piglets. The results showed that, as compared with Control, the daily weight gains of the piglets in Group A, B and C increased by 30.40% （P〈0.05）, 28.88% （P〈0.05） and 31.06% （P〈0.05）, respectively; the feed conversion ratios increased by 2.02%, 7.25% and 10.26%, respectively; the daily feed intakes increased by 26.23%, 14.75% and 9.84%, respectively; and, the rates of blocking the classic swine fever antibody increased by 9.57%, 18.27% and 30.93% （P〈0.05）, respectively. The rates of positive classic swine fever antibody in all three treatment groups were greater than 70%, and the variation coefficients of Group B and C were lower than 40%. It appeared that the TCM used had a measurable effect on PCV2 infection, piglet growth, as well as the piglet＇s immune-response to the hog cholera vaccine. Insofar as TCM dosage is concerned, the best result was obtained on Group C that had a 2% addition on its feed.