Dunbar Mike R, Johnson Shylo R, Rhyan Jack C, McCollum Matt
United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, Colorado 80521, USA.
J Zoo Wildl Med. 2009 Jun;40(2):296-301. doi: 10.1638/2008-0087.1.
Infrared thermography (IRT) measures the heat emitted from a surface, displays that information as a pictorial representation called a thermogram, and is capable of being a remote, noninvasive technology that provides information on the health of an animal. Foot-and-mouth disease (FMD) caused by FMD virus (FMDV) is a severe, highly communicable viral disease of cloven-hoofed animals, including both domestic and wild ruminants. Early detection of the disease may reduce economic loss and loss of susceptible wildlife. The objective of this study was to evaluate the use of IRT to detect possible heat changes associated with sites of infection with FMDV in experimentally infected mule deer (Odocoileus hemionus). Infection occurred through either inoculation with FMDV or exposure to inoculated animals. Early vesicular lesions were observed on the mouth, feet, or both within 24 hrs postinoculation and 48-96 hrs post-exposure. From internal temperature sensors, the exposed animals' body temperatures elevated significantly from the pre-infection temperature (38.8 degrees C, P < or = 0.002) starting the day before any lesions were observed. Body temperature was also found not to be significantly different from eye temperatures of well-focused thermograms. For feet thermograms, the mean of the daily maximum (MMAX) foot temperature rose significantly (P = 0.017) from two days before (27.3 degrees C +/- 1.9 degrees C SE) to the maximum MMAX observed (33.0 degrees C +/- 2.0 degrees C SE) at two days after the first foot lesion occurrence. These observed changes indicate that IRT may be a rapid, remote, and noninvasive method to screen for suspect animals in order to test further for FMDV infection during an FMD outbreak.
红外热成像（IRT）可测量从物体表面发出的热量，将该信息以称为热像图的图像形式呈现，并且能够作为一种远程、非侵入性技术，提供有关动物健康状况的信息。由口蹄疫病毒（FMDV）引起的口蹄疫（FMD）是偶蹄类动物（包括家养和野生反刍动物）的一种严重的、高度传染性的病毒性疾病。疾病的早期检测可能会减少经济损失以及易感野生动物的损失。本研究的目的是评估使用红外热成像技术检测实验性感染骡鹿（白尾鹿）中与口蹄疫病毒感染部位相关的可能热变化。感染通过接种口蹄疫病毒或接触接种动物发生。接种后24小时内以及接触后48 - 96小时内，在口腔、足部或两者均观察到早期水疱性病变。从内部温度传感器来看，在观察到任何病变的前一天开始，暴露动物的体温从感染前的温度（38.8摄氏度，P≤0.002）显著升高。还发现体温与聚焦良好的热像图的眼部温度无显著差异。对于足部热像图，每日最高（MMAX）足部温度的平均值从首次出现足部病变前两天（27.3摄氏度±1.9摄氏度标准误）到首次出现足部病变后两天观察到的最高MMAX（33.0摄氏度±2.0摄氏度标准误）显著升高（P = 0.017）。这些观察到的变化表明，在口蹄疫疫情期间，红外热成像可能是一种快速、远程且非侵入性的方法，用于筛查可疑动物以便进一步检测口蹄疫病毒感染。
