The antibacterial effect of Eucalyptus globulus aqueous crude extract was investigated against antibiotic resistant strains of Streptococcus pneumoniae. Using the agar diffusion techniques, the crude aqueous extract showed activity on strain SP91 at 4.0mg/ml. The minimum inhibitory concentration (MIC) was 0.7 mg/ml. The minimum bactericidal concentration (MBC) was 2.0 mg/ml. The results of the phytochemical screening revealed the presence of alkaloids, carbohydrates, tannins, saponin etc. The results of this study suggest that Eucalyptus globulus could be a potential source of chemotherapeutic drugs that can be used for the treatment of pneumonia.


Eucalyptus globules, Streptococcus pneumomae, Antibacterial effect.