Inhibitory action of Lippia gracilis Schauer essential oil on pathogenic bacteria and its effects as a growth promoter on quail

Aim of the study: To examine in vitro sensitivity Salmonella sp. and Escherichia coli strains to microbial activity Lippia gracilis Schauer essential oil (LGSEO) determine optimal level LGSEO as a growth promoter diets for Japanese quail up 35 days age.Area São Cristovão, Sergipe, Brazil.Material methods: A total 504 female quails (Coturnix coturnix japonica) at an initial average body weights 6.80±0.10 g was allotted one six treatments (0, 100, 200, 300, 400 mg/kg diet containing 500 bacitracin methylene disalicylate) 7 replicates, using 12 birds per experimental unit.Main results: In age period 21 days, feed intake declined linearly (p=0.04) efficiency improved (p<0.01), whereas no changes were observed production performance (p>0.05). The estimated (p=0.01) maximum relative proventriculus pancreas obtained inclusion levels 196.5 251 mg/kg, respectively. Inclusion 100 300 reduced bacterial count.Research highlights: use organ development demonstrated potential antimicrobial capacity against bacteria. Due its pharmacological composition, can potentially substitute antimicrobials, because contains thymol carvacrol main active constituents.