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Biotin deficiency and fatty liver and kidney syndrome in chicks given purified diets containing different fat and protein levels

Published online by Cambridge University Press:  25 March 2008

C. C. Whitehead ,
D. W. Bannister ,
A. J. Evans ,
W. G. Siller  and
P. A. L. Wight
C. C. Whitehead
Affiliation:
Agricultural Research Council's Poultry Research Centre, West Mains Road, Edinburgh EH9 3JS
D. W. Bannister
Affiliation:
Agricultural Research Council's Poultry Research Centre, West Mains Road, Edinburgh EH9 3JS
A. J. Evans
Affiliation:
Agricultural Research Council's Poultry Research Centre, West Mains Road, Edinburgh EH9 3JS
W. G. Siller
Affiliation:
Agricultural Research Council's Poultry Research Centre, West Mains Road, Edinburgh EH9 3JS
P. A. L. Wight
Affiliation:
Agricultural Research Council's Poultry Research Centre, West Mains Road, Edinburgh EH9 3JS
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Abstract

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1. The occurrence of biotin deficiency and fatty liver and kidney syndrome (FLKS) in chicks was studied using a 2 × 2 × 2 × 2 factorial-design experiment in which the variables were dietary biotin, fat and protein, and starvation.

2. The severity of biotin deficiency, using growth retardation and severity of dermal lesions as criteria, was least when the low-biotin diet also contained low levels of fat and protein. Addition of fat or protein increased the severity of the deficiency. Tissue fatty acid composition was affected by biotin deficiency only in those birds given the low-protein, low-fat diet. The main change was an increase in the ratio, 16:1 fatty acids:18:0 fatty acids. Plasma glucose and free fatty acid levels in non-fasted birds were unaffected by the dietary variables.

3. Mortality from FLKS with the diet containing low biotin, fat and protein levels was 52% at 28 d, but was reduced or eliminated when the dietary level of any of these ingredients was increased.

4. Starvation considerably increased the incidence of FLKS in the period immediately after fasting, and also affected plasma glucose and free fatty acid concentrations. Liver fatty acid composition indicated an increase in the proportion of 18:0 at the expense of 16:1 and 18:1, irrespective of diet, except when the bird developed FLKS, when 16:1 and 18:1 concentrations increased in proportion, at the expense of 18:0.

5. The relationship between biotin deficiency and FLKS, and a possible mechanism for the induction of FLKS by starvation are discussed.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 35 , Issue 1 , January 1976 , pp. 115 - 125
Copyright
Copyright © The Nutrition Society 1976

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