酒泉市猪圆环病毒2型和3型的流行病学监测和分析

为掌握酒泉市五个农业县猪圆环病毒2型（PCV2）和3型(PCV3)流行情况，在辖区内不同区域、不同养殖规模、不同生长阶段的19个规模化养殖场、38个散养户、4家屠宰场采集血清样品230份、粪便样品250份、猪肺脏、扁桃体、颌下淋巴结等组织样品220份，进行PCV2和PCV3核酸检测，检出阳性样品138份，阳性率为21.23%，PCV2的阳性率为15.54%，PCV3的阳性率为5.69%，表明PCV2的流行比PCV3更普遍、阳性感染率更高，但在不同区域、不同规模猪场的危害程度和流行情况存在一定的差异。规模养殖场的总体阳性感染率明显低于散养户，保育猪的感染率高于其他生长阶段的生猪。本次实验对酒泉市猪场PCV感染综合防控提供技术支撑，为科学养猪产生积极影响。

Epidemiological Surveillance and Analysis of Porcine Circovirus Types 2 and 3 in Jiuquan City

This study aims to understand the prevalence of porcine circovirus type 2 (PCV2) and type 3 (PCV3) in five agricultural counties in Jiuquan City. 230 serum samples, 250 fecal samples, pig lungs, tonsils, and submandibular lymph nodes were collected from 19 large scale farms, 38 free range households, and 4 slaughterhouses in different areas, different breeding scales, and different growth stages. Wait for 220 tissue samples. We conducted PCV2 and PCV3 nucleic acid testing on these samples, and 138 positive samples were detected, with a positive rate of 21.23%. The positive rate of PCV2 was 15.54%, and the positive rate of PCV3 was 5.69%. This indicates that PCV2 is more prevalent and has a higher positive infection rate than PCV3. However, there are certain differences in the degree of harm and prevalence in different regions and pig farms of different sizes. The overall positive infection rate in large scale farms is significantly lower than that in free range households, and the infection rate in nursery pigs is higher than that of pigs at other growth stages. This experiment provides technical support for the comprehensive prevention and control of PCV infection in pig farms in Jiuquan City, which has a positive impact on scientific pig farming.