Journal of Animal Science and Technology
Korean Society of Animal Science and Technology
Article

Broiler responses to dietary 3,4,5-trihydroxybenzoic acid and oregano extracts under Eimeria challenge conditions

Myunghwan Yu1, Jong Oh Jeon1, Hyun Min Cho1, Jun Seon Hong1, Yu Bin Kim1, Shan Randima Nawarathne1, Samiru Sudharaka Wickramasuriya1, Young-Joo Yi2, Hans Lee3, Vannie Wan3, Noele Kai Jing Ng3, Chuan Hao Tan3, JUNG MIN HEO1,*
1Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea.
2Department of Agricultural Education, College of Education, Sunchon National , Suncheon 57922, Korea.
3Kemin Industries, Inc, Singapore 758200, Singapore.
*Corresponding Author: JUNG MIN HEO, Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea, Republic of. E-mail: jmheo@cnu.ac.kr.

© Copyright 2021 Korean Society of Animal Science and Technology. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Oct 13, 2021; Revised: Oct 21, 2021; Accepted: Oct 22, 2021

Published Online: Oct 25, 2021

Abstract

A total of 336 one-day-old broilers were randomly assigned to one of six dietary treatments with seven replications per treatment. Dietary treatments were: i) Non-challenged bird without any dietary treatment (NCNT), ii) Challenged bird without any dietary treatment (CNT), iii) Challenged birds fed a THB diet (0.1 g/kg, THB), iv) Challenged birds fed a combination of THB and oregano extracts diet  (0.1 g/kg, COM 100), and a gradual increase of combination of THB and oregano extracts likely v) 0.15 g/kg (COM 150), and 0.2 g/kg (COM 200). On day 14, all groups except for NCNT have orally challenged with a 10-fold dose of  Livacox<sup>®</sup> T anticoccidial vaccine to trigger coccidiosis. The results indicated that <italic>Eimeria</italic>-challenged broilers fed COM 100 and COM 200 diets increased (<italic>P</italic> &lt; 0.05) body weight (BW) than CNT diet on day 35. Furthermore, birds fed COM 100 and COM 200 diets increased (<italic>P</italic> &lt; 0.05) average daily gain compared to those fed CNT diets for the entire experimental period. There is no significant (<italic>P</italic> &gt; 0.05) in average daily feed intake, feed efficiency between NCNT and birds fed with combined THB and oregano extracts for the entire experimental period. A combination of THB and oregano extract regardless of concentration levels or THB alone reduced (<italic>P</italic> &lt; 0.05) lesion score in ileum compared to the CNT diet for 7 days post-infection (dpi). Birds fed COM 100 diet had lower (<italic>P</italic> &lt; 0.05) intestinal lesion scores in jejunum and caeca on 7 dpi compared to those were in the CNT diet. No (<italic>P</italic> &gt; 0.05) difference was observed in the oocysts per gram of feces (OPG) count, intestinal morphology, carcass traits and blood cytokine concentration among the infected treatments. Collectively, we conclude that birds fed with a combination of THB and oregano extracts regardless of the ratios that were used demonstrated better recovery of health after the coccidial challenge than using only THB alone.

Keywords: Broiler; coccidiosis; growth performance; oregano extract; 3,4,5-trihydroxybenzoic acid