| Newcastle diseases, ND is also called the Asian roup or pseudo roup, is by the new town of(Newcastle diseases virus, NDV caused by avian acute, highly contact thermal resistance, sexually transmitted diseases. Newcastle disease has spread rapidly, and the characteristics of high mortality, is one of the world's most recognized the dangers of raising industry one of the major infectious diseases. For Newcastle disease in our country in recent years adopted strict overall immunization measures, but at present it is still the most serious harm, one of the most widely distributed of infectious diseases. To better understand after immunization, the crowd antibody generation and antibody degree distribution, this study of xi 'an different districts, different sources of Newcastle disease monitoring the immune antibody. From 2011 to 2015, from being one of xi 'an, high land, changan district, baqiao, zhouzhi county, yanliang, lantian county, not ended area total 13 counties such as blood samples collected 3465 collection, involves the scale to a chicken farm to pay a more than 120, free-range 10, livestock and poultry market 3, 3227 qualified samples. Of collected blood samples to separate serum, blood clotting test and blood clotting inhibition test, antibody concentration to classification statistical monitoring results according to different categories. The result shows that from 2011 to 2015, during the spring and autumn xian Newcastle disease immune antibody pass rate reached more than 70%, the average percent of pass is 93%, the immune effect is good. According to different season five years of data and monitoring the immune antibody percent of pass. Test results show that after reasonable immunity procedure and standardized operation, comprehensive chickens after immune antibody protection level is higher, can be used as a reference program for promotion. |
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