An experiment was conducted on 210 healthy one day old broiler chicks to evaluate the effect of
synbiotics and/ or essential oils on induced necrotic enteritis (NE) and coccidiosis. The treated
groups were, 1) ABAC group: challenged with Eimeria spp. + C. perfringens and fed basal diet
with antibiotic and anticoccidial drugs; 2) SY group: challenged with Eimeria spp. + C. perfringens
and fed basal diet with synbiotic; 3) EO group: challenged with Eimeria spp. + C. perfringens and
fed basal diet with essential oils (EO); 4) SYEO group: challenged with Eimeria spp. + C.
perfringens and fed basal diet with combination of synbiotics and essential oils; 5) CO group: fed
basal diet and challenged with Eimeria spp.; 6) NE group: fed basal diet and challenged with
Eimeria spp. + C. perfringens, and 7) CN group: fed basal diet. All additives were given from 0 day
(d) to 35 d. The results showed positive impact of synbiotic and EO treatments on lesion scoring
and C. perfringens quantification in comparison with challenged non treated groups. The body
weight did not show significant improvement (P>0.05) in SY group but the EO group increased the
BW (P>0.05). The treatments significantly decreased the oocyst shedding, dropping scoring and
litter scoring against coccidiosis infection in comparison with NE group (P0.05). All treatments significantly improved the histopathological lesion scoring
of intestine and liver as well as the coccidial infection score (P