Early Detection of Infection in Pigs through an Online Monitoring System
Early Detection of Infection in Pigs through an Online Monitoring System
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DOI：
10.1111/tbed.12372
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发表时间：
2017-04-01
影响因子：
4.3
通讯作者：
Sanchez-Vizcaino, J. M.
中科院分区：
文献类型：
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作者：
Martinez-Aviles, M.;Fernandez-Carrion, E.;Sanchez-Vizcaino, J. M.
紧急疾病的迟发给生猪生产者和政府造成了巨大的经济损失。由于动物感染的最初症状通常是发烧和运动减少，从而减少了水和饲料的消耗，我们开发了一种新型的智能系统来实时监测体温和运动，有助于及早发现传染病。这项研究是在欧盟研究项目Rapidia field的框架内进行的，我们在10头猪身上测试了SMART系统，这些猪被实验感染了两种剂量的非洲猪瘟减毒株。生物传感器和嵌入耳机的加速度计捕捉感染前后的数据，并使用摄像机每天24小时监测动物。结果显示，9例中有8例在体温测量、临床体征观察、用水量减少或病毒qPCR检测阳性的发热检测前或同时发现感染，表现为体温升高、活动减少。此外，使用视频图像的自动分析可以可靠地检测到运动的这种减少，因此提供了直接运动测量的廉价替代方案。该系统可以设置为在一只或多只动物中检测到高烧、运动减少或两者兼而有之时向工作人员发出警报。这一系统可用于实时监测哨兵群，大大减少定期抽样的财务和后勤成本，并增加早期发现感染的机会。
Late detection of emergency diseases causes significant economic losses for pig producers and governments. As the first signs of animal infection are usually fever and reduced motion that lead to reduced consumption of water and feed, we developed a novel smart system to monitor body temperature and motion in real time, facilitating the early detection of infectious diseases. In this study, carried out within the framework of the European Union research project Rapidia Field, we tested the smart system on 10 pigs experimentally infected with two doses of an attenuated strain of African swine fever. Biosensors and an accelerometer embedded in an eartag captured data before and after infection, and video cameras were used to monitor the animals 24 h per day. The results showed that in 8 of 9 cases, the monitoring system detected infection onset as an increase in body temperature and decrease in movement before or simultaneously with fever detection based on rectal temperature measurement, observation of clinical signs, the decrease in water consumption or positive qPCR detection of virus. In addition, this decrease in movement was reliably detected using automatic analysis of video images therefore providing an inexpensive alternative to direct motion measurement. The system can be set up to alert staff when high fever, reduced motion or both are detected in one or more animals. This system may be useful for monitoring sentinel herds in real time, considerably reducing the financial and logistical costs of periodic sampling and increasing the chances of early detection of infection.