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Factors associated with low vitamin D status of Australian alpacas

Judson, G. J., McGregor, B. A. and Partington, D. L. 2008, Factors associated with low vitamin D status of Australian alpacas, Australian veterinary journal, vol. 86, no. 12, pp. 486-490.

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Title Factors associated with low vitamin D status of Australian alpacas
Author(s) Judson, G. J.
McGregor, B. A.ORCID iD for McGregor, B. A. orcid.org/0000-0002-4574-4236
Partington, D. L.
Journal name Australian veterinary journal
Volume number 86
Issue number 12
Start page 486
End page 490
Total pages 4
Publisher Wiley - Blackwell
Place of publication Oxford, England
Publication date 2008-12
ISSN 0005-0423
1751-0813
Summary Objective To investigate factors associated with low vitamin D status of alpacas at pasture in southern Australia.

Design A 2-year survey of alpacas from two farms in South Australia and three in Victoria. Blood samples were collected from 20 to 30 alpacas on each farm on five occasions each year. Breed, gender, age and fleece colour of animals were recorded.

Method Blood samples were assayed for plasma 2.5-hydroxycholecalciferol (25-OH D3) and plasma inorganic phosphorus (Pi). Data sets from 802 animal samples were analysed by multiple regression to determine variables associated with low vitamin D status of alpacas. The relationship between plasma 25-OH D3 and plasma Pi was also investigated.

Results Vitamin D status was significantly affected by month of sampling, with low values in late winter and high values in summer. Plasma vitamin D concentrations increased with age, were higher in alpacas with light fleeces than in those with dark fleeces and were also higher in the Suri than in the Huacaya breed. Plasma Pi concentrations were generally lower in alpacas with plasma 25-OH D3 values < 25 nmol/L.

Conclusions Young alpacas with dark fleeces are most at risk from vitamin D insufficiency in late winter in southern Australia. The present study indicates that plasma Pi values are not a reliable indicator of vitamin D status of alpacas as assessed by plasma 25-OH D3 concentrations.
Language eng
Field of Research 060802 Animal Cell and Molecular Biology
070201 Animal Breeding
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, SARDI, Journal compilation, Australian Veterinary Association
Persistent URL http://hdl.handle.net/10536/DRO/DU:30024564

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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