Seasonal interaction of serum vitamin D concentration and bone density in alpacas

Jill E. Parker, Karen I. Timm, Bradford B. Smith, Robert J. Van Saun, Kerri Winters-Stone, Peerapol Sukon, Christine M. Snow

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Objective-To evaluate temporal changes in bone mineral density associated with seasonal variation in serum vitamin D, calcium, and phosphorus concentrations in alpacas. Animals-5 healthy mature neutered male alpacas. Procedure-Metacarpal bone mineral density was measured at 4 times during a year. Each time alpacas were weighed, blood was collected for determination of serum calcium, phosphorus, and vitamin D concentrations, and samples of feed were analyzed for nutrient content. Vitamin D status was determined by use of an assay that measured serum 25-hydroxycalciferol concentration. Effects of changes in serum vitamin D, calcium, and phosphorus concentration and body weight with season on bone mineral density were determined. Results-Bone mineral density, body weight, and serum vitamin D and phosphorus concentrations varied with season. Bone mineral density, serum vitamin D concentration, and body weight also varied among individual alpacas. Serum vitamin D concentration was lower in January than the previous October and increased from May to the following September. The decrease in bone mineral density lagged behind the decrease in serum vitamin D concentration and was lower in May, compared with the previous October. Body weight was lower in May than the previous October or following September. Solar radiation was highest in July and lowest in December. Conclusions and Clinical Relevance-Seasonal changes in bone mineral density are associated with changes in serum vitamin D concentrations in alpacas. Changes in bone mineral density associated with a decline in serum vitamin D concentration may predispose some alpacas to developing fractures minimal trauma.

Original languageEnglish (US)
Pages (from-to)948-953
Number of pages6
JournalAmerican Journal of Veterinary Research
Volume63
Issue number7
StatePublished - 2002
Externally publishedYes

Fingerprint

New World Camelids
alpacas
bone density
vitamin D
blood serum
Vitamin D
Bone Density
Serum
Phosphorus
Body Weight
phosphorus
body weight
Calcium
calcium
25-Hydroxyvitamin D 2
25-hydroxyergocalciferol
metacarpus
Metacarpal Bones
solar radiation
nutrient content

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Parker, J. E., Timm, K. I., Smith, B. B., Van Saun, R. J., Winters-Stone, K., Sukon, P., & Snow, C. M. (2002). Seasonal interaction of serum vitamin D concentration and bone density in alpacas. American Journal of Veterinary Research, 63(7), 948-953.

Seasonal interaction of serum vitamin D concentration and bone density in alpacas. / Parker, Jill E.; Timm, Karen I.; Smith, Bradford B.; Van Saun, Robert J.; Winters-Stone, Kerri; Sukon, Peerapol; Snow, Christine M.

In: American Journal of Veterinary Research, Vol. 63, No. 7, 2002, p. 948-953.

Research output: Contribution to journalArticle

Parker, JE, Timm, KI, Smith, BB, Van Saun, RJ, Winters-Stone, K, Sukon, P & Snow, CM 2002, 'Seasonal interaction of serum vitamin D concentration and bone density in alpacas', American Journal of Veterinary Research, vol. 63, no. 7, pp. 948-953.
Parker, Jill E. ; Timm, Karen I. ; Smith, Bradford B. ; Van Saun, Robert J. ; Winters-Stone, Kerri ; Sukon, Peerapol ; Snow, Christine M. / Seasonal interaction of serum vitamin D concentration and bone density in alpacas. In: American Journal of Veterinary Research. 2002 ; Vol. 63, No. 7. pp. 948-953.
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