Efficiency of Testosterone Administration on the Performance of Day Old Chick (DOC) Layer: Cockscomb Size, T3/T4 Ratio, and Histopathological Description of Bursa Fabricius

DOI

10.2991/absr.k.210420.008How to use a DOI?

Keywords

Rooster layer, cockscomb size, ratio T3/T4, bursa fabricius

Abstract

This study aimed to evaluate the efficiency of single and continuous testosterone injection against cockscomb size, T3/T4 ratio, and histopathological features of the bursa of Fabricius in the male layers. Sixty DOC layers were divided into 3 groups namely control (C), single testosterone injection with a dose of 3 mg/day (TO), and continues testosterone injection induced for 35 days (TC). One mL of blood was collected through the brachial vein, cockscomb measurements were performed serially every week for 5 weeks, while the bursa of Fabricius organ was carried out subsequently after the animal was sacrificed. Analysis of thyroid hormones was performed using ELISA, while the histopathological features were performed by HE staining. The results showed that cockscomb size was C: (6.29±1.62), TO: (7.79±0.21), and TC: (8.64±1.58) cm2. However, there was no difference between TO and TC at week 5 (P > 0.05). There was a significant decrease of the T3/T4 ratio at week 3, control: 3.24±0.18; TO: 3.76±0.39; and TC: 2.44±0.14. At the age of 35 days, crystals had been formed in the bursa of Fabricius in group TO and TC. In conclusion, testosterone injection affects cockscomb size, T3/T4 ratio, and accelerates degeneration of the bursa of Fabricius. Furthermore, the administration of a single dose of testosterone injection is more efficient than the continuous one.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Rizki Fitrawan Yuneldi
AU  - Claude Mona Airin
AU  - Hendry TSSG Saragih
AU  - Pudji Astuti
PY  - 2021
DA  - 2021/04/21
TI  - Efficiency of Testosterone Administration on the Performance of Day Old Chick (DOC) Layer: Cockscomb Size, T3/T4 Ratio, and Histopathological Description of Bursa Fabricius
BT  - Proceedings of the 2nd International Conference on Veterinary, Animal, and Environmental Sciences (ICVAES 2020)
PB  - Atlantis Press
SP  - 35
EP  - 39
SN  - 2468-5747
UR  - https://doi.org/10.2991/absr.k.210420.008
DO  - 10.2991/absr.k.210420.008
ID  - Yuneldi2021
ER  -