Correlation between broiler lameness and anatomical measurements of bone using radiographical projections with assessments of consistency across and within radiographs.

Toscano, Michael Jeffrey; Nasr, M. A. F.; Hothersall, B. (2013). Correlation between broiler lameness and anatomical measurements of bone using radiographical projections with assessments of consistency across and within radiographs. Poultry Science, 92(9), pp. 2251-2258. Oxford University Press 10.3382/ps.2012-02904

[img] Text
Poultry Science-2013-Toscano-2251-8.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (745kB) | Request a copy
[img]
Preview
Text
poultrysci92-2251.pdf - Other
Available under License Publisher holds Copyright.

Download (743kB) | Preview

Lameness represents a major welfare and production issue in the poultry industry with a recent survey estimating 27% of birds lame and 3% unable to walk by 40 d of age. A variety of factors may induce lameness and are typically grouped into 2 broad classes on the basis of being infectious or skeletal in nature with the latter accounting for the majority of cases. The current work sought to build upon a large body of literature assessing the anatomical properties of bone in lame birds. Our specific objectives sought to identify relationships between relevant anatomical properties of the tibia and metatarsus using digital quantification from radiographs of legs and a measure of walking difficulty. Resulting output was statistically analyzed to assess 1) observer reliability for consistency in placing the leg during the radiograph procedure and quantification of the various measures within a radiograph, 2) the relationship between the various measurements of anatomical bone properties and sex, bird mass, and gait score, and 3) the relationship between each measurement and leg symmetry. Our anatomical bone measures were found to be reliable (intra-rater and test-retest reliabilities < 0.75) within radiograph for all measures and 8 of the 10 measures across radiographs. Several measures of bone properties in the tibia correlated to difficulty walking as measured by gait score (P < 0.05), indicating greater angulations with increasing lameness. Of the measures that manifested a gait score × bird mass interaction, heavier birds appeared to exhibit less angulation with increasing difficulty walking with lighter birds the opposite. These interactions suggest possibilities for influencing effects of activity or feed intake on bone mineralization with the bone angulation observed. Our efforts agree with that of others and indicate that angulation of the tibia may be related to lameness, though subsequent efforts involving comprehensive measures of bird activity, growth rates, and internal bone structure will be needed if the validity of the measures are to be accepted.

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 Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute > Animal Welfare Division
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)

UniBE Contributor:

Toscano, Michael Jeffrey

Subjects:

600 Technology > 630 Agriculture

ISSN:

0032-5791

Publisher:

Oxford University Press

Language:

English

Submitter:

Susanne Portner

Date Deposited:

22 Aug 2014 14:34

Last Modified:

24 Oct 2019 20:05

Publisher DOI:

10.3382/ps.2012-02904

PubMed ID:

23960106

BORIS DOI:

10.7892/boris.45802

URI:

https://boris.unibe.ch/id/eprint/45802

Actions (login required)

Edit item Edit item
Provide Feedback