Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection
ABSTRACT: The study was conducted to evaluate the effects of graded levels of Eimeria maxima challenge on endogenous loss, apparent ileal digestibility (AID), and standard ileal digestibility (SID) of amino acids. A total of 768 fourteen-day-old male Cobb 500 broiler chickens were randomly allocated...
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doaj-5186784e4609451899aa4b3cb10d97572021-09-21T04:08:30ZengElsevierPoultry Science0032-57912021-11-0110011101426Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infectionPo-Yun Teng0Sudhir Yadav1Hanyi Shi2Woo Kyun Kim3Department of Poultry Science, University of Georgia, Athens, GA, USADepartment of Poultry Science, University of Georgia, Athens, GA, USADepartment of Poultry Science, University of Georgia, Athens, GA, USACorresponding author:; Department of Poultry Science, University of Georgia, Athens, GA, USAABSTRACT: The study was conducted to evaluate the effects of graded levels of Eimeria maxima challenge on endogenous loss, apparent ileal digestibility (AID), and standard ileal digestibility (SID) of amino acids. A total of 768 fourteen-day-old male Cobb 500 broiler chickens were randomly allocated into 64 battery cages. Apart from the regular corn-soybean based diet, the nitrogen-free diet (NFD) was formulated to determine the endogenous loss of amino acids. One-half of the birds (32 cages) were fed the NFD, and another half fed the regular diet from d 14 to 20. Both groups were further assigned to 4 treatments (nonchallenged control or three levels of challenge doses) with 8 replicate cages. The challenge doses were: the low challenge dose (Low) with E. maxima 12,500 oocysts, the medium challenge dose (Medium) with 25,000 E. maxima oocysts, and the high challenge dose (High) with 50,000 E. maxima oocysts. At 6 d postinfection, ileal digesta samples were collected and the intestinal lesion score were recorded. The results indicated a significant linear increase of endogenous amino acid flow in response to the graded E. maxima challenge. Moreover, the AID and SID of amino acids were linearly reduced due to the increasing challenge dose. The study demonstrated that NFD significantly reduced lesion scores, underestimating the true endogenous losses of birds fed regular diets. Even though the endogenous loss of amino acids was underestimated, they were linearly increased in response to the graded E. maxima challenge. In conclusion, the higher Eimeria dose birds were challenged with, the more endogenous amino acids were released into the intestine and the lower dietary nutrients were digested and absorbed by broiler chickens.http://www.sciencedirect.com/science/article/pii/S0032579121004491coccidiosisEimeria maximaendogenous lossstandard ileal digestibilityapparent ileal digestibility |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Po-Yun Teng Sudhir Yadav Hanyi Shi Woo Kyun Kim |
spellingShingle |
Po-Yun Teng Sudhir Yadav Hanyi Shi Woo Kyun Kim Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection Poultry Science coccidiosis Eimeria maxima endogenous loss standard ileal digestibility apparent ileal digestibility |
author_facet |
Po-Yun Teng Sudhir Yadav Hanyi Shi Woo Kyun Kim |
author_sort |
Po-Yun Teng |
title |
Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection |
title_short |
Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection |
title_full |
Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection |
title_fullStr |
Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection |
title_full_unstemmed |
Evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of E. maxima infection |
title_sort |
evaluating endogenous loss and standard ileal digestibility of amino acids in response to the graded severity levels of e. maxima infection |
publisher |
Elsevier |
series |
Poultry Science |
issn |
0032-5791 |
publishDate |
2021-11-01 |
description |
ABSTRACT: The study was conducted to evaluate the effects of graded levels of Eimeria maxima challenge on endogenous loss, apparent ileal digestibility (AID), and standard ileal digestibility (SID) of amino acids. A total of 768 fourteen-day-old male Cobb 500 broiler chickens were randomly allocated into 64 battery cages. Apart from the regular corn-soybean based diet, the nitrogen-free diet (NFD) was formulated to determine the endogenous loss of amino acids. One-half of the birds (32 cages) were fed the NFD, and another half fed the regular diet from d 14 to 20. Both groups were further assigned to 4 treatments (nonchallenged control or three levels of challenge doses) with 8 replicate cages. The challenge doses were: the low challenge dose (Low) with E. maxima 12,500 oocysts, the medium challenge dose (Medium) with 25,000 E. maxima oocysts, and the high challenge dose (High) with 50,000 E. maxima oocysts. At 6 d postinfection, ileal digesta samples were collected and the intestinal lesion score were recorded. The results indicated a significant linear increase of endogenous amino acid flow in response to the graded E. maxima challenge. Moreover, the AID and SID of amino acids were linearly reduced due to the increasing challenge dose. The study demonstrated that NFD significantly reduced lesion scores, underestimating the true endogenous losses of birds fed regular diets. Even though the endogenous loss of amino acids was underestimated, they were linearly increased in response to the graded E. maxima challenge. In conclusion, the higher Eimeria dose birds were challenged with, the more endogenous amino acids were released into the intestine and the lower dietary nutrients were digested and absorbed by broiler chickens. |
topic |
coccidiosis Eimeria maxima endogenous loss standard ileal digestibility apparent ileal digestibility |
url |
http://www.sciencedirect.com/science/article/pii/S0032579121004491 |
work_keys_str_mv |
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