Wilder than intense: higher frequency, variability, and viral flows of porcine circovirus 3 in wild boars and rural farms compared to intensive ones in northern Italy

野性大于强度：与意大利北部密集的猪场相比，野猪和农村农场中猪圆环病毒 3 的发生频率、变异性和病毒流动更高