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Indian Journal of Veterinary Pathology
Year : 2012, Volume : 36, Issue : 1
First page : ( 114) Last page : ( 116)
Print ISSN : 0250-4758. Online ISSN : 0973-970X.

Organic acids as a replacer of growth promoter antibiotics in broilers: Pathological and bacteriological studies on intestine

Roy H.S., Mukhopadhayay S.K.*, Niyogi D.1, Choudhary P.K.1, Ganguly S.2

Department of Veterinary Pathology, Faculty of Veterinary & Animal Sciences, Kolkata-700 037 (W.B.)

1College of Veterinary Science and Animal Husbandry, Narendra Deva University of Agriculture and Technology, Kumarganj, Faizabad224 229 (U.P.)

2AICRP-PHT (ICAR), Department of Fish Processing Technology, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences, Kolkata-700 094 (W.B.)

*Corresponding author: E-mail: skmpath@gmail.com

Online published on 18 October, 2012.


Experimental studies were conducted to evaluate the pathomorphological effect of different combination of organic acids viz. formic acid, propionic acid and lactic acid as a replacer of growth promoter antibiotics. The birds were divided into six equal groups viz. negative control (C1), positive control (C2) and treatment groups (T1, T2, T3 and T4). Birds of group C1 were supplied with diet without any antibiotics or acid, group C2 with Virginiamycin @ 500 gm/100kg feed, group T1 with 0.3% ammonium formate group T2 with 0.3% calcium propionate, group T3 with 0.15% ammonium formate and 0.15% calcium propionate and group T4 with 0.1% ammonium formate, 0.1% calcium propionate and 0.1% calcium lactate. Body weight gain was higher in C1 and C 2 compared with treatment groups in first two weeks, but pathological changes were maximum in negative control, i.e. after 6 weeks, weight gain was significantly better in T3 and T 4 than in groups C1, T1 and T2 groups. Bacteriologically, significant (P<0.01) reduction of E. coli in T1 and T4 was evident. Pathomorphological changes in group C1 and T2 were maximum. Group C2 and T1 showed same types of changes but the changes were less severe in group T3 and T 4. The most common changes among the groups were thickening of muscular layer, accumulation of inflammatory cells and congested blood vessels. Based on present investigation, it is suggested that combination of organic acid may be used in broiler feed as a replacer of growth promoter antibiotic instead of using only one acid.



Broilers, growth promoter, intestine, organic acid, pathomorphology.


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