A field trial of infrared thermography as a non-invasive diagnostic tool for early detection of digital dermatitis in dairy cows

Alsaaod, Maher; Syring, Claudia; Dietrich, Joëlle; Doherr, Marcus G; Gujan, T; Steiner, Adrian (2014). A field trial of infrared thermography as a non-invasive diagnostic tool for early detection of digital dermatitis in dairy cows. Veterinary journal, 199(2), pp. 281-5. Elsevier 10.1016/j.tvjl.2013.11.028

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Infrared thermography (IRT) was used to detect digital dermatitis (DD) prior to routine claw trimming. A total of 1192 IRT observations were collected from 149 cows on eight farms. All cows were housed in tie-stalls. The maximal surface temperatures of the coronary band (CB) region and skin (S) of the fore and rear feet (mean value of the maximal surface temperatures of both digits for each foot separately, CBmax and Smax) were assessed. Grouping was performed at the foot level (presence of DD, n=99; absence, n=304), or at the cow level (all four feet healthy, n=24) or where there was at least one DD lesion on the rear feet, n=37). For individual cows (n=61), IRT temperature difference was determined by subtracting the mean sum of CBmax and Smax of the rear feet from that of the fore feet. Feet with DD had higher CBmax and Smax (P<0.001) than healthy feet. Smax was significantly higher in feet with infectious DD lesions (M-stage: M2+M4; n=15) than in those with non-infectious M-lesions (M1+M3; n=84) (P=0.03), but this was not the case for CBmax (P=0.12). At the cow level, an optimal cut-off value for detecting DD of 0.99°C (IRT temperature difference between rear and front feet) yielded a sensitivity of 89.1% and a specificity of 66.6%. The results indicate that IRT may be a useful non-invasive diagnostic tool to screen for the presence of DD in dairy cows by measuring CBmax and Smax.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > Veterinary Public Health / Herd Health Management
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Clinic for Ruminants
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)

UniBE Contributor:

Alsaaod, Maher; Syring, Claudia; Doherr, Marcus and Steiner, Adrian

Subjects:

600 Technology > 630 Agriculture

ISSN:

1090-0233

Publisher:

Elsevier

Language:

English

Submitter:

Susanne Portner

Date Deposited:

19 Mar 2014 12:30

Last Modified:

12 Feb 2015 11:23

Publisher DOI:

10.1016/j.tvjl.2013.11.028

PubMed ID:

24389042

Uncontrolled Keywords:

Coronary band Dairy cow Digital dermatitis Infrared thermography

BORIS DOI:

10.7892/boris.44861

URI:

https://boris.unibe.ch/id/eprint/44861

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