Ingested soil and iodine deficiency in lambs

Autor:	G. Crouchley, P.c. Rankin, R.L. Gillett, W.B. Healy, H.M. Watts
Rok vydání:	1972
Předmět:	Soil Science chemistry.chemical_element Plant Science Biology medicine.disease Iodine Iodine deficiency Animal science Agronomy chemistry medicine Animal Science and Zoology Agronomy and Crop Science Feces
Zdroj:	New Zealand Journal of Agricultural Research. 15:778-782
ISSN:	1175-8775 0028-8233
DOI:	10.1080/00288233.1972.10421631
Popis:	Post-mortem and clinical examination of lambs on the Department of Agriculture Field Research Area at Masterton in 1971 showed that there was a high prevalence of enlarged thyroids in lambs from ewes on low-stocked areas; the condition was almost entirely absent in lambs on high-stocked areas. Faeces from ewes on high-stocked areas which were closely grazed contained substantially more soil than did faeces from ewes on lowstocked areas which had ample feed in winter 1971. Iodine in faeces followed a similar pattern to soil in faeces. Iodine in herbage showed no differences between high- and low-stocked areas. The data suggest that ingested soil was a source of iodine to ewes on high-stocked areas and that this accounts for the virtual absence of enlarged thyroids in the lambs. Possible reasons for the appearance of goitre in 1971 are considered.
Databáze:	OpenAIRE
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