“…Eucalyptus has been used for medicine, ornament purposes, cosmetics, food, and the pulp industry since ancient times. Some constituents extracted from eucalyptus leaf illustrated antimicrobial and anti-inflammatory activities including (1, 8-cineole eucalyptol) ( Vecchio et al, 2016 ), a-Pinene, 8-Pinene, Sabinene ( Dellacassa et al, 1990 ), ZnO ( Ahmad et al, 2020 ), FeO 2 , and Ag ( Salgado et al, 2019 ). This study revealed that eucalyptus leaf extract showed antimicrobial activity against E. coli causing colibacillosis disease in poultry.…”