Effects of early age feed restriction and heat conditioning on heterophil/lymphocyte ratios, heat shock protein 70 expression and body temperature of heat-stressed broiler chickens

Idrus, Zulkifli and Liew, Pit Kang and Israf Ali, Daud Ahmad and Omar, Abdul Rahman and Bejo, Mohd Hair (2003) Effects of early age feed restriction and heat conditioning on heterophil/lymphocyte ratios, heat shock protein 70 expression and body temperature of heat-stressed broiler chickens. Journal of Thermal Biology, 28 (3). pp. 217-222. ISSN 0306-4565

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Official URL: http://dx.doi.org/10.1016/S0306-4565(02)00058-X

Abstract

We examined the effects of early age feed restriction and heat conditioning on heterophil/lymphocyte ratios (HLR), heat shock protein (hsp) 70 expression and body temperature of heat-stressed male broiler chickens. On day (d) 1,chicks were subjected to (1) 60% feed restriction on d 4, 5, and 6 (FR); (2) exposure to 36±1°C for 1 h from d 1 to 21 (HT); (3) both FR and HT (FRHT); or (4) control. On d 35, all the birds were exposed to 39±1°C for 6 h. Subjecting chicks to FR, HT and FRHT reduced HLR response to the heat challenge. The FR and FRHT birds had improved hsp 70 response and the latter were more hyperthermic than controls during the heat exposure.

Item Type:Article
Keyword:Heat stress, Early age feed restriction, Heat conditioning, Heterophil/lymphocyte ratio, Heat shock protein 70, Body temperature, Broiler chickens
Faculty or Institute:Faculty of Veterinary Medicine
Publisher:Elsevier Science
DOI Number:10.1016/S0306-4565(02)00058-X
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/S0306-4565(02)00058-X
ID Code:6466
Deposited By: Azizan Arshad
Deposited On:17 May 2010 02:03
Last Modified:19 Aug 2010 07:00

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