Propolis is known to have considera

Propolis is known to have considerable antimicrobial, antiinflammatory,
and immunomodulatory effects (Bankova et
al., 2000; Burdock, 1998; Dobrowolski et al., 1991). It is also
has been shown that propolis could be a successful
additive in poultry production. Khojasteh Shalmany and
Shivazad (2006) reported that the inclusion of propolis
in broiler chickens diets improved the growth performance.
Galal et al. (2008) showed that dietary supplementation
of propolis improved both performance and the
immune response of laying hens. Ziaran et al. (2005) also
reported that diet supplementation with propolis modulated
both the humoral and cellular immunity of broiler
chickens.