%0 Journal Article %T Effect of inclusion of Shirazi thyme (Zataria multiflora Boiss) aqueous extract in drinking water on performance and immune responses of broilers %J Iranian Journal of animal Science %I پردیس کشاورزی و منابع طبیعی دانشگاه تهران %Z 2008-4773 %A Farzanfar, Neda %A Mohammadi, Mehrdad %A Roostaie Ali-Mehr, Mohammad %D 2015 %\ 06/22/2015 %V 46 %N 2 %P 141-149 %! Effect of inclusion of Shirazi thyme (Zataria multiflora Boiss) aqueous extract in drinking water on performance and immune responses of broilers %K Broilers %K Immune system %K Zataria multifora Boiss extract %K performance %R 10.22059/ijas.2015.55645 %X This study was conducted to investigate the effect of0 (control), 0.5, 1, 1.5 and 2 ml/L of Shirazi thyme aqueous extract in drinking water on performance and immune response in broilers. Two hundred one- day- old broiler chicks (Ross 308) were allocated to five treatments with four replicates and 10 birds per cage in a completely randomized design. Daily feed intake, daily body weight gain and feed conversion ratio were measured. The birds were chalenged by sheep red blood cell (SRBC) on days 8 and 22 of age and serum antibody levels produced in response to SRBC were measured on days 21, 28, 35 and 42. Skin response to Phytohemagglutinin-P (PHA-P) injection was assessed intradermally on day 16. The Shirazi thyme aqueous extract had no effect on feed intake, daily weight gain, feed conversion ratio and carcass traits. The consumption of 2 ml/L Shirazi thyme aqueous extract in drinking water increased total Anti-SRBC and IgM titers on day 21; 1 and 1.5 ml/L increased IgM titer on day 28; 0.5, 1.5 and 2 ml/L increased total Anti-SRBC and IgG titers on day 35 and 1.5 and 2 ml/L increased IgG titer on day 42 (P<0.05). Cell immunity in response to PHA-P injection was not affected by treatment groups. It can be concluded that Zataria multifora Boiss have no effects on performance and cell immunity but improve humoral immunity in broilers. %U https://ijas.ut.ac.ir/article_55645_78b2ab6d2bffbfddb4ce205617ac4c8b.pdf