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Title: Heat Production and Energy Efficiency of Broilers Infected With Necrotic Enteritis
Contributor(s): M Sadeq, Shawkat (author); Wu, Shubiao  (author)orcid ; Choct, Mingan  (author)orcid ; Swick, Robert A  (author)orcid 
Publication Date: 2016
DOI: 10.1637/11233-070915-reg.1
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Abstract: Necrotic enteritis (NE) in poultry is the most important bacterial disease in terms of economic losses. The present study was conducted to evaluate the effect of an experimental challenge with necrotic enteritis on respiration and heat production in birds pretreated with dietary acylated starch or antibiotics (AB) zinc bacitracin (50 mg/kg) plus salinomycin (60 mg/kg). In total, 48 1-day-old Ross 308 male broilers were assigned to floor pens until day 10. On day 11, birds were randomly placed into 16 calorimetric chambers with four replicates of three birds per treatment. Treatments were: control, AB, acetylated high-amylose maize starch (SA), or butyrylated high-amylose maize starch (SB). Birds were NE challenged by inoculation with 5000 sporulated oocysts each of 'Eimeria maxima' and 'Eimeria acervulina' and 2500 sporulated oocysts of 'Eimeria brunetti' on day 9 and 'Clostridium perfringens' (3.8 6 108 colony-forming units) on day 14. The results showed that heat production (HP), respiratory quotient (RQ), heat increment, weight gain (WG), feed intake (FI), and livability (LV) of birds fed control, SA, and SB diets were lower than birds fed AB at 19 and 42 hr postinoculation (P , 0.05). At 65 hr postchallenge, increased FI and WG of birds were observed, indicating recovery from NE. During the entire period, from day 14 to day 17, birds fed control, SA, and SB had lower WG, FI, HP, RQ, metabolizable energy intake (MEI), and metabolizable energy (P , 0.01) than those fed AB. The data demonstrate that 'Eimeria' sp. and 'C. perfringens' challenge reduces growth performance, HP, RQ, metabolizable energy, and MEI of birds fed control, SA, and SB but not AB diets
Publication Type: Journal Article
Source of Publication: Avian Diseases, 60(1), p. 50-55
Publisher: American Association of Avian Pathologists
Place of Publication: United States of America
ISSN: 1938-4351
Field of Research (FOR): 070204 Animal Nutrition
070205 Animal Protection (Pests and Pathogens)
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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