Antibacterial effect of dragon's blood in in vitro cultures on ATCC bacterial strains

Abstract

Objective. The objective of the research was to evaluate the antibacterial effect of dragon's blood (Croton lechleri) on in vitro cultures of ATCC bacterial strains; Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922, at different concentrations: 1%, 2%, 4%, 6%, 8%, 16%, 80%, 90% and 100%. Materials and methods. A total of 54 cultures were performed, of which 27 cultures corresponded to the analysis of the extract of dragon's blood (Croton lechleri) at different concentrations against Staphylococcus aureus ATCC 25923 and 27 cultures to the analysis of the extract of dragon's blood (Croton lechleri) against the bacterium Escherichia coli ATCC 25922, where 3 replicates were applied for each treatment. Results. In the results, no inhibition halo was observed for the sensitivity discs prepared at different concentrations; therefore, the ATCC bacterial strains Staphylococcus aureus 25923 and Escherichia coli 25922 do not show sensitivity to dragon's blood (Croton lechleri). Conclusions. From the results obtained we can conclude that dragon's blood (Croton lechleri) does not present antibacterial activity for the ATCC bacterial strains; Staphylococcus aureus 25923 and Escherichia coli 25922.