Assessment of the efficacy of antibiotics given as in-feed medication to grower pigs
1996
Boonrit Thongsong (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Veterinary Science. Dept. of of Animall Husbandry)
Attempt was made to assess the efficacy of antibiotics as in-feed medication to grower pigs by measuring growth performance, feed-cost ratios. Eighty grower pigs, with an average body weight of 27 kg, were randomly allocated into four groups of twenty pigs and fed ad-libitum for 62 days with feed containing (Treatment A) 40 ppm Acetyl isovaleryl tylosin (AIV) plus 300 ppm Chlortetracycline hydrochoride, (Treatment B) 20 ppm AIV plus 300 ppm Chlortetracycline hydrochoride, (Treatment C) 110 ppm Tylosin plus Sulfamethazine and (Treatment D) 44 ppm Lincomycin plus Spectinomycin. The average daily gain (A.D.G), feed convertion ratio (F.C.R) and feed costs were recorded and compared. At the end of the experiment treatment A gave the highest growth performance, while treatment D showed the lowest feed cost per kilogram gain. Average final body weight, difference in body weight and average daily gain of treatment A were statistically different (p0.05) when compared with treatment C.
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