We assessed the causes of polyserositis in pigs, categorized by causative agents and ages of animals affected. In a 3-y study, 246 pigs from 80 different farms with recurrent problems of polyserositis, in a high-density breeding area, were submitted for autopsy; 154 pigs with typical fibrinous serosal lesions were sampled for further bacterial and viral investigation. The most common gross lesions were pleuritis and pericarditis (141 of 154; 92%). The animals most affected were weaned pigs (139 of 154; 90%). Haemophilus parasuis and Mycoplasma hyorhinis were the most common bacteria detected and were present at the same rate (85 of 154; 55%). Other bacteria isolated were Streptococcus sp. (44 of 154; 29%), Pasteurella multocida (21 of 154; 14%), Escherichia coli (19 of 154; 12%), Actinobacillus pleuropneumoniae (7 of 154; 5%), and Trueperella pyogenes (4 of 154; 3%). Porcine reproductive and respiratory syndrome virus (PRRSV; 119 of 154; 77%) predominated among the viruses detected, followed, with lesser prevalence, by porcine circovirus 2 (40 of 154; 26%) and swine influenza A virus (19 of 154; 12%). Bacterial coinfection and coinfection of bacteria and viruses were common (128 of 154; 83%). A strong positive correlation was found between coinfection by H. parasuis and M. hyorhinis and also by H. parasuis with PRRSV.

我们评估了猪多发性浆膜炎的病因，按致病因素和受影响动物的年龄进行了分类。在一项为期3年的研究中，来自80个不同农场的246头猪在高密度繁殖区出现了多发性浆膜炎的反复发作，并进行了尸检。抽取了154头典型的纤维性浆膜病变猪进行了进一步的细菌和病毒研究。最常见的肉眼病变是胸膜炎和心包炎（154例中的141例； 92％）。受影响最大的动物是断奶的猪（154只中的139只； 90％）。副猪嗜血杆菌和猪支原体是最常见的细菌，检出率相同（154个中的85个； 55％）。分离的其他细菌是链球菌。（154之44； 29％），多杀巴斯德氏菌（154个中的21个； 14％），大肠杆菌（154个中的19个； 12％），胸膜肺炎放线杆菌（154个中的7个； 5％）和化脓性疟原虫（154个中的4个； 3％）。猪繁殖与呼吸综合症病毒（PRRSV； 154中的119； 154％； 77％）占主导地位，其次是猪圆环病毒2（154中的40； 26％）和甲型猪流感病毒（154中的19； 5）。 12％）。细菌合并感染以及细菌和病毒合并感染很普遍（154个中的128个； 83％）。甲强正相关是由共感染之间发现副猪嗜血杆菌和M.猪鼻支原体，并且还由副猪嗜血菌与PRRSV。