EFFECT OF THYROIDISM ON PRODUCTIVE PERFORMANCE OF GROWING NEW ZEALAND WHITE RABBITS UNDER HOT SUMMER CONDITION IN EGYPT

Document Type : Original Article

Authors

1 Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculturepokki, Giza, Egypt.

2 Animal health Research institute, Agricultural Research Center, Ministry of Agriculture,Dokki, Giza, Egypt.

Abstract

Total of thirty growing New Zealand White rabbits (NZW) aged 35 days and
624121.5(9) live body weight were used in this study. Rabbits were divided into similar
three groups and treated once weekly as follows: The 15‘ group (control) was injected with
saline solution, the 2““ and the 3” groups were treated by eltroxin (hyperthyroidism) and
carbimazoie (hypothyroidism), respectively for two moths.
At 12 weeks of age. feed intake, body weight and body gain in carbimazole treatment
were higher than eltroxin and control. Also, it improved growth rate and feed conversion
than control by 8% and 3%, respectively. At 12 weeks of age, the minimum rectal
temperature was found in eltroxin group.
Carblmazole had the higher final body weight than eltroxin and control by 11.1% and
135%. respectively. Dressing percentage was significantly (P<0.05) higher in eltroxin and
carbimazole than that of the control group. However, weights of liver, kidneys, lungs and
heart were almost higher in the control than both tested groups.
Level of T4 and T3 in control group increased compared to hyperthyroidism or
hypothyroidism. There is no hematological change in both hyper and hypothyroid groups.

Keywords

Journal of Animal and Poultry Production
Volume 30, Issue 4
April 2005
Pages 1971-1981

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