The histological study of small intestine and immune response and performance of broiler chicken after simultaneous indication of tylosin and Zataria multiflora
Message:
Abstract:
This experiment was conducted to evaluate the effect of Zataria multiflora (ZM) and Tylosin antibiotic on immunity response and intestinal morphology in broiler chicken. The experiment was performed with six treatments and four litter pen repeats by using 480 Ross 308 broiler chickens in a complete randomized design study. Each litter pen had 20 chickens. In this experiment we used two levels of Tylosin and three levels of ZM. The treatments included the oily extract of Zataria multiflora in the three levels (0, 1 and 2 g/kg) and Tylosin phosphate(25%) in the two levels (0 and 200 mg/kg) in the chicken feed of six treatments.In the evaluation of antibody titer in the 13 day old chicks no significant interaction effect of ZM and Tylosin was found. There was no significant effect on feed conversion ratio (FCR) and weight gain in whole periods. In the evaluation of different levels of ZM, treatment containing 2 g/kg rather than level 0 significantly reduced feed intake. In the various periods, addition of ZM and Tylosin had no significant effect on the FCR and level 200 mg/kg Tylosin × 2 ZM was better than 0 mg/kg Tylosin×2 ZM (p<0.05). In the other treatments there was no difference. The simultaneous use of ZM and Tylosin in the different levels also had no significant effect on the weight gain (p>0.05). In evaluation of the effect of ZM and Tylosin at different levels separately, the length of intestine villi, increased by the level zero of ZM. Also in zero level of Tylosin the length of villi significantly increased rather than level 20 of Tylosin. In evaluation of the interaction effect of ZM and Tylosin on the length of intestine villi, the treatment 1 ZM×0 Tylosin had more effect rather than treatments 1 ZM×200 Tylosin and 2 ZM×200 Tylosin with greater length of villi (p<0.05). In considering three levels of ZM, the level 1 increased villi width significantly but Tylosin levels did not affect villi width alone. In the treatment 1 ZM×0 Tylosin, rather than the treatment 2 ZM×200 Tylosin, the width of the villi was greater, but had no significant difference with the other treatments. In considering the interaction effect of ZM and Tylosin there was no significant effect of above treatments on the depth of crypts (p>0.05).
Language:
Persian
Published:
Iranian Journal of Dynamic Agriculture, Volume:7 Issue: 1, 2010
Page:
11
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