Pettersson Emelie, Hestad Sanna, Möttus Ivo, Skiöldebrand Eva, Wallgren Per
1Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute, SE-751 89 Uppsala, Sweden.
2Department of Clinical Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden.
Porcine Health Manag. 2019 Feb 8;5:7. doi: 10.1186/s40813-019-0114-0. eCollection 2019.
Piglet diarrhoea is considered a worldwide problem resulting in animal welfare problems and financial losses for pig farmers. Porcine rotavirus and the coccidian parasite () are considered two important pathogens associated with diarrhoea in piglets during the suckling and early post weaning periods. To obtain an overview on the prevalence of porcine rotavirus and in piglet producing herds with solid floors and age segregated rearing, faecal sampling of 791 litters in 81 farms was performed.
For porcine rotavirus, faecal samples were analysed using a sandwich ELISA. The overall prevalence of rotavirus in the examined herds was 11.4 ± 17.7% at 2 weeks, 56.8 ± 30.7% at 4 weeks and 71.1 ± 29.1% at 6 weeks of age and the accumulated prevalence was 49, 97 and 100%. To detect faecal samples were analysed using sedimentation. The overall prevalence of in the examined herds was 11.9 ± 15.1% at 2 weeks of age, 10.7 ± 16.7% at 4 weeks and 8.7 ± 15.3% at 6 weeks of age and the accumulated prevalence was 56, 76 and 85%. The number of empty days between farrowing batches did influence the shedding of rotavirus at 2 weeks of age but not later. Regarding , no difference in prevalence was correlated to the number of days between consecutive farrowing batches.
Our study confirmed that rotavirus should be regarded as an ubiquitous virus that can be expected to be present in almost every pig herd in Sweden. The study also demonstrated that the number of infected litters increased from birth to 6 weeks of age. Secondly, it showed that frequently occurred in pig herds and that the number of infected litters was rather stable from two to 6 weeks of age. Consequently, both rotavirus and may play a role in intestinal disturbances in piglets during the suckling and post weaning periods despite age segregated rearing, at least in systems with solid floors. However, as this study was carried out in herds without reported problems with diarrhoea or poor weight gain, the role of these pathogens should not be overestimated.
仔猪腹泻被认为是一个全球性问题，会导致动物福利问题以及给养猪户造成经济损失。猪轮状病毒和球虫寄生虫（）被认为是与哺乳和断奶后早期仔猪腹泻相关的两种重要病原体。为了全面了解采用实地面和按年龄分群饲养的仔猪生产猪群中猪轮状病毒和的流行情况，对81个农场的791窝仔猪进行了粪便采样。
对于猪轮状病毒，采用夹心酶联免疫吸附测定法（ELISA）分析粪便样本。在所检测猪群中，2周龄时轮状病毒的总体流行率为11.4±17.7%，4周龄时为56.8±30.7%，6周龄时为71.1±29.1%，累积流行率分别为49%、97%和100%。为检测，采用沉淀法分析粪便样本。在所检测猪群中，2周龄时的总体流行率为11.9±15.1%，4周龄时为10.7±16.7%，6周龄时为8.7±15.3%，累积流行率分别为56%、76%和85%。分娩批次之间的空栏天数确实会影响2周龄时轮状病毒的排出，但对之后没有影响。关于，流行率的差异与连续分娩批次之间的天数无关。
我们的研究证实，轮状病毒应被视为一种普遍存在的病毒，预计在瑞典几乎每个猪群中都有。该研究还表明，感染窝数从出生到6周龄有所增加。其次，研究表明在猪群中频繁发生，且感染窝数从2周龄到6周龄相当稳定。因此，尽管按年龄分群饲养，至少在实地面系统中，轮状病毒和在哺乳和断奶后仔猪肠道紊乱中可能都起作用。然而，由于本研究是在没有腹泻或体重增加不佳报告问题的猪群中进行 的，这些病原体的作用不应被高估。
