The northern European wild boar population has increased during the last decade. Highest wild boar numbers in Finland have been reported in the southeastern part near the Russian border. Wild boars may be infected with several human and animal pathogens. In this study, we investigated the presence of important foodborne pathogens in wild boars hunted in 2016 in Finland using serology, PCR and culturing. Seroprevalence of Salmonella (38%) and Yersinia (56%) infections was high in wild boars. Antibodies to hepatitis E virus, Toxoplasma gondii and Brucella were found in 18%, 9% and 9% of the wild boars, respectively. Trichinella antibodies were detected in 1% of the animals. We recorded no differences in the seroprevalence between males and females. However, Yersinia and T. gondii antibodies were detected significantly more often in adults than in young individuals. Listeria monocytogenes (48%) and stx-positive Escherichia coli (33%) determinants were frequently detected in the visceral organs (spleen and kidneys) by PCR. Yersinia pseudotuberculosis O:1 and L. monocytogenes 2a and 4b were identified by culturing from the PCR-positive samples. Brucella suis biovar 2 was isolated from visceral organs. No African swine fever, classical swine fever or Aujeszky’s disease were detected in the wild boars. Our study shows that wild boars are important reservoirs of foodborne pathogens.

在过去十年中，北欧野猪的数量有所增加。据报道，芬兰东南部靠近俄罗斯边境的野猪数量最多。野猪可能会感染多种人类和动物病原体。在这项研究中，我们使用血清学、PCR 和培养方法调查了 2016 年在芬兰猎杀的野猪中是否存在重要的食源性病原体。野猪中沙门氏菌（38%）和耶尔森氏菌（56%）感染的血清阳性率很高。分别在 18%、9% 和 9% 的野猪中发现了针对戊型肝炎病毒、弓形虫和布鲁氏菌的抗体。旋毛虫在 1% 的动物中检测到抗体。我们记录的男性和女性之间的血清阳性率没有差异。然而，耶尔森氏菌和弓形虫抗体在成年人中的检测频率明显高于在年轻人中。通过 PCR 经常在内脏器官（脾脏和肾脏）中检测到单核细胞增生李斯特菌（48%）和stx阳性大肠杆菌（33%）决定簇。通过从 PCR 阳性样品中培养鉴定出假结核耶尔森菌O:1 和单核细胞增生李斯特菌2a 和 4b。猪布鲁氏菌biovar 2 是从内脏器官中分离出来的。在野猪中未检测到非洲猪瘟、古典猪瘟或Aujeszky病。我们的研究表明，野猪是食源性病原体的重要宿主。