title: The use of infrared thermography as an early indicator of bovine respiratory disease complex in calves.
abstract: Bovine respiratory disease (BRD) complex causes considerable distress to domestic livestock and economic hardship to the beef industry. Furthermore, the resulting extensive use of antimicrobial treatments is a growing concern from the perspective of facilitating antibiotic resistant microbes. The earlier detection of BRD would enable an earlier, more targeted treatment regime and earlier isolation of infected individuals. The objective of the present study was to investigate the use of non-invasive infrared thermography in the early detection of BRD in cattle. Studies were conducted on 133 head of weaned calves. Data demonstrated that infrared thermography was able to identify animals at early stages of illness, often several days to over one week before clinical signs were manifest. Data indicated that 4-6 days prior to the onset of clinical symptoms of BRD, greater positive and negative predictive values and test efficiency for infrared thermography (80%, 65% and 71%, respectively) compared to the industry standard practice of clinical scoring (70%, 45% and 55%, respectively).
authors.affiliation: Agriculture and Agri-Food Canada, 6000 C and E trail, Lacombe, Alta., Canada T4L 1W1. schaefera@agr.gc.ca
authors.forename: A L
authors.initials: AL
authors.lastname: Schaefer
authors.forename: N J
authors.initials: NJ
authors.lastname: Cook
authors.forename: J S
authors.initials: JS
authors.lastname: Church
authors.forename: J
authors.initials: J
authors.lastname: Basarab
authors.forename: B
authors.initials: B
authors.lastname: Perry
authors.forename: C
authors.initials: C
authors.lastname: Miller
authors.forename: A K W
authors.initials: AK
authors.lastname: Tong
mesh_terms: D000818:Animals; D048090:Bovine Respiratory Disease Complex / Q000175:diagnosis*; D002417:Cattle; D007259:Infrared Rays; D011237:Predictive Value of Tests; D013817:Thermography / Q000662:veterinary*