Abstract
Experiments were conducted to study the effect subtherapeutic levels of dietary antibiotic supplementation on the growth, intestinal characteristics and bacterial populations of chicks reared on "dirty" versus "clean" water. the lack of growth response to antibiotics in a Results showed that growth response to penicillin was independent of water treatment and the magnitude of growth response ranged from 0.9 to 18.3% levels. Bursal weights were significantly increased (P<0.05) and intestinal weights significantly decreased (P<0.01) in. chicks fed penicillin. The effect of antibiotics on The lack of growth response to antibiotics in intestinal thickness and length were inconsistent while bacterial counts on Sulfite - the only common denominator to all Polymyxin-Sulfadiazine (SPS) and K.F. antibiotics is their ability to inhibit the growth streptococcus agar were unaffected by penicillin and water treatments.
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