The effect of vitamin E on cellular immune responses in laying hens forced-moulted by different methods
ARCHIV FUR GEFLUGELKUNDE, sa.1, ss.28-34, 2006 (SCI-Expanded)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2006
- Dergi Adı: ARCHIV FUR GEFLUGELKUNDE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
- Sayfa Sayıları: ss.28-34
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Hayır
Özet
The aim of the study was to investigate the effects of vitamin E on the cellular immunity in laying hens induced by two different moulting programs. One hundred and forty four Isabrown hens 72 weeks of age were divided into six treatment groups: FAST group was moulted by fed withdrawal for 10 days; FAST+WE group was moulted by feed withdrawal for 10 days and feed with vitamin E supplemention (200 mg/kg) thereafter; Lo Na group was fed the full layer ration containing 0.08% sodium for 41 days; Lo Na+VE group was fed the full layer ration containing 0.08% sodium for 41 days with vitamin E supplementation (200 mg/kg), and two control (CON FAST and CON Lo Na) groups were feed the full layer ration. Plasma samples were collected from the hens in premoult, moulting I, II, postmoult I and II for determinating the plasma vitamin E levels, total and differential leukocyte count, and the delayed type hypersensitivity. Hens of the FAST, FAST+VE, Lo Na and Lo Na+VE groups exhibited a significant increase in total leukocyte in moulting I. The lymphocyte percentage was significantly lower in FAST+VE group compared to the FAST group. The heterophil percentages in moulting I and II of both moulting programs were lower than in the control groups (p < 0.05). The delayed type hypersensitivity tests (DTH) in the treatment groups were found higher than in control groups. The results of the study suggested that supplementing vitamin E to moulted laying hens could be beneficial to cellular immune responses.