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

Abstract:

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.