Document Detail

Thyroid function, growth hormone, and organ growth in broilers deficient in phosphorus.
MedLine Citation:
PMID:  3452219     Owner:  NLM     Status:  MEDLINE    
The effects of a dietary P deficiency on thyroid function, serum growth hormone, and growth parameters in 10 to 29-day-old broiler cockerels was determined. Chicks fed severely P-deficient diets (.05% or .10% available P) grew more slowly and ate less feed than controls fed .65% P. The deficiency was also accompanied by hypercalcemia, hypophosphatemia, and decreases in percent bone ash, fat-free tibial weight, and tibial length and width. Increases in the relative weights of kidneys, hearts, and pituitary glands (.05% P only) occurred as well. Most of these changes occurred to a lesser extent or not at all in pair-fed controls, showing that they resulted specifically from the P deficiency and were not simply a result of reductions in feed intake. Phosphorus deficiency also was accompanied by peripheral edema and hydropericardium. Relative thyroid weight was unaffected. Serum triiodothyronine was consistently lower in the P-deficient chicks, although effects were significant only in one experiment. Thyroxine levels tended to be low also, but not consistently so. Serum growth hormone in P-deficient chicks in both studies was consistently lower than that in pair-fed controls, but this was significant only when .10% but not .05% available P was fed. The findings suggest that serum levels of both thyroid hormone and growth hormone are altered by P deficiency, but the results were not clearly definitive.
T G Parmer; L B Carew; F A Alster; C G Scanes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Poultry science     Volume:  66     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  1987 Dec 
Date Detail:
Created Date:  1988-07-15     Completed Date:  1988-07-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1995-2004     Citation Subset:  IM    
Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, CT 06510.
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MeSH Terms
Body Weight*
Growth Hormone / blood*
Organ Size
Phosphorus / deficiency*
Poultry Diseases / blood,  physiopathology*
Thyroid Hormones / blood*
Reg. No./Substance:
0/Thyroid Hormones; 7723-14-0/Phosphorus; 9002-72-6/Growth Hormone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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